Preparatory Notes for ASNT NDT Level III Examination - Ultrasonic Testing, UT

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Content: Section 2: Physics of Ultrasound 2.0: Ultrasound Formula 2.1: Wave Propagation 2.2: Modes of Sound Wave Propagation 2.3: Sound Propagation in Elastic Materials 2.4: Properties of Acoustic Plane Wave 2.5: Wavelength and Defect Detection 2.6: Attenuation of Sound Waves 2.7: Acoustic Impedance 2.8: Reflection and Transmission Coefficients (Pressure) 2.9: Refraction and Snell's Law 2.10: Mode Conversion 2.11: Signal-to-Noise Ratio 2.12: The Sound Fields- Dead / Fresnel & Fraunhofer Zones 2.13: Inverse Square Rule/ Inverse Rule 2.14: Resonance 2.15 Measurement of Sound 2.16 Practice Makes Perfect
2.0: Ultrasound Formula http://www.ndt-ed.org/GeneralResources/Calculator/calculator.htm
Page 1: Preparatory Notes for ASNT NDT Leve
Page 6 and 7: Numerical Prefix • Micro - (µ) a
Page 8 and 9: Contents: 1. ASNT Level III Exam To
Page 10 and 11: 4. Interpretation/Evaluations • E
Page 12 and 13: UT - Ultrasonic Testing Length: 4 h
Page 14 and 15: 3. Techniques/Calibrations •Conta
Page 16 and 17: ASME V Article Numbers: Gen Article
Page 18: Other Reading • http://techcorr.c
Page 21 and 22: Content: Section 1: Introduction 1.
Page 23 and 24: Content: Section 3: Equipment & Tra
Page 25 and 26: Content: Section 4: Calibration Met
Page 27 and 28: Content: Section 6: Selected Applic
Page 29 and 30: Section 1: Introduction
Page 31 and 32: 1.1: Basic Principles of Ultrasonic
Page 33 and 34: In ultrasonic testing, the reflecte
Page 35 and 36: Basics of Ultrasonic Test- Contact
Page 37 and 38: Basics of Ultrasonic Test- A-Scan
Page 39 and 40: Source-2: The advantages of ultraso
Page 41 and 42: • Operation is electronic, which
Page 43 and 44: 1.3: Limitations (Disadvantages) As
Page 48 and 49: Ultrasonic Formula
Page 50: Parameters of Ultrasonic Waves
Page 53 and 54: Acoustic Spectrum
Page 55 and 56: Acoustic Spectrum
Page 57 and 58: Acoustic Wave - Node and Anti-Node
Page 59 and 60: Q151 A point, line or surface of a
Page 61 and 62: 2.2.2 Propagation & Polarization Ve
Page 63 and 64: Longitudinal and shear waves- Defin
Page 65 and 66: Longitudinal and shear waves
Page 67 and 68: In longitudinal waves, the oscillat
Page 69: Longitudinal Wave
Page 72 and 73: Shear waves vibrate particles at ri
Page 74: In the transverse or shear wave, th
Page 77 and 78: 2.2.5 Rayleigh Characteristics Rayl
Page 79 and 80: Rayleigh waves
Page 81 and 82: Surface (or Rayleigh) waves travel
Page 83 and 84: The major axis of the ellipse is pe
Page 85 and 86: Surface wave or Rayleigh wave are f
Page 87 and 88: Surface wave - Following Contour Su
Page 89 and 90: Rayleigh Wave http://web.ics.purdue
Page 91 and 92: Love Wave
Page 93 and 94: At this depth, wave energy is about
Page 95 and 96:
Q: Which of the following modes of
Page 97 and 98:
Since the 1990s, the understanding
Page 99 and 100:
Plate or Lamb waves are the most co
Page 101 and 102:
Plate wave or Lamb wave are formed
Page 103 and 104:
When guided in layers they are refe
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Symmetrical = extensional mode Asym
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Other Reading: Lamb Wave Lamb waves
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Fig. 4 Diagram of the basic pattern
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2.2.7 Dispersive Wave: Wave modes s
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Plate or Lamb waves are generated a
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2.3: Sound Propagation in Elastic M
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Spring model- A mass on a spring ha
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Elastic Model
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Elastic Model / Longitudinal Wave
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Elastic Model / Shear Wave
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Since the mass m and the spring con
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Elastic constant → spring constan
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Q163 Acoustic velocity of materials
Page 131 and 132:
When calculating the velocity of a
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It must also be mentioned that the
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Longitudinal Wave Velocity: V L The
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2.4: Properties of Acoustic Plane W
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http://www.ndt-ed.org/EducationReso
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Java don’t work? Uninstalled →
Page 143 and 144:
Java don’t work? http://jingyan.b
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Java don’t work? http://jingyan.b
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The velocities sound waves The velo
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2.5: Wavelength and Defect Detectio
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Keywords: • Discontinuity must be
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Keywords: • Coarse grains →Lowe
Page 155 and 156:
Coarse grains →Lower frequency to
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Keywords: • Higher the frequency,
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2.5.3 Further Reading Detectability
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Determining cross sectional area us
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“Sonic pulse volume” and S/N (d
Page 166 and 167:
2.6: Attenuation of Sound Waves 2.6
Page 168 and 169:
Absorption: Sound attenuations are
Page 170 and 171:
Anisotropic Columnar Grains with di
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The amplitude change of a decaying
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Attenuation is generally proportion
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Amplitude at distance Z where: Wher
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2.6.2 Factors Affecting Attenuation
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2.6.4 Further Reading on Attenuatio
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Q168: Heat conduction, viscous fric
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2.7: Acoustic Impedance Acoustic im
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Sound travels through materials und
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Reflection/Transmission Energy as a
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Q2.8: The acoustic impedance of mat
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When the acoustic impedances of the
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Reflection Coefficient:
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Using the above applet, note that t
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Incident Wave other than Normal? -
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Q: The figure above shown the parti
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For example: The dB loss on transmi
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Q6: For an ultrasonic beam with nor
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Refraction and Snell's Law When an
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Refraction takes place at an interf
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Snell's Law describes the relations
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Snell Law http://www.ndt-ed.org/Edu
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When a longitudinal wave moves from
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Refraction and mode conversion occu
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For example, calculate the first cr
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Snell Law: 1 st / 2 nd Critical Ang
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Q. Both longitudinal and shear wave
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Typical angle beam assemblies make
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Depth & Skip
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Second Critical Angle The second cr
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2.10: Mode Conversion When sound tr
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In the previous section, it was poi
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Snell's Law
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Reflections
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V S1 V S2
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Snell Law- 1 st & 2 nd Critical Ang
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Transverse wave can be introduced i
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Calculate the offset for following
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Refraction and mode conversion at n
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Refraction and mode conversion at n
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Q1. From the above figures, if the
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Q: On Calculation: Incident angle=
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Q1. If you were requested to design
Page 266 and 267:
2.11: Signal-to-Noise Ratio In a pr
Page 268 and 269:
The following formula relates some
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Rather than go into the details of
Page 273 and 274:
Determining cross sectional area us
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“Sonic pulse volume” and S/N (d
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Pulse Length
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2.12: The Sound Fields 2.12.1 Wave
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When waves interact, they superimpo
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UT Transducer http://www.fhwa.dot.g
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UT Transducer
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Wave Interaction Complete in-phase
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With an ultrasonic transducer, the
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29. It is possible for a discontinu
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2.12.2 Variations in sound intensit
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The sound wave exit from a transduc
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The Near Field (Fresnel) and the Fa
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Amplitude ← Near Field Effect: Be
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Near field (near zone) or Fresnel z
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Near/ Far Fields http://miac.unibas
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where α is the radius of the trans
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The curvature and the area over whi
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Fresnel & Fraunhofer Zone
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Fresnel & Fraunhofer Zone http://st
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Q4: A transducer has a near field i
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2.12.4 Dead Zone In ultrasonic test
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Dead Zone -The initial pulse is a t
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Dead Zone Illustration http://www.n
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Q: On an A-scan display, the “dea
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2.13: Inverse Square Rule/ Inverse
Page 325 and 326:
Small Reflector, a reflector smalle
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2.14: Resonance Another form wave i
Page 331 and 332:
Thickness of Crystal at Fundamental
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Resonance UT Testing- The diagram b
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From the natural frequencies it is
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Q: The formula used to determine th
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2.15 Measurement of Sound
Page 341 and 342:
Ultrasonic Formula - Signal Amplitu
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where: delta X is the difference in
Page 345 and 346:
From this table it can be seen that
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However, the power or intensity of
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Revising the table to reflect the r
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Sound Levels- Relative dB
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“Absolute" Sound Levels Sound pre
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dB meter 97.3dB against standards s
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Exercise: Find the absolute sound l
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Practice: dB
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Example Calculation 2 If the intens
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What is the absolute rock concert s
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Practice Makes Perfect 28. An advan
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学习总是开心事
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Page 372 and 373:
Page 374 and 375:
Page 376 and 377:
Page 379 and 380:
Typical sound velocities
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Content: Section 3: Equipment & Tra
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3.1: Piezoelectric Transducers The
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Pulse width (PW) - the time duratio
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Piezoelectric Properties The conver
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Fig. 5.10: Basic design of a single
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Piezoelectric crystals http://www.n
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Piezoelectric crystals
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Page 397 and 398:
The active element of most acoustic
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The fundamental frequency of the tr
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At Interface: Reflection & Transmit
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At Interface: Reflection & Transmit
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Page 407 and 408:
Page 409 and 410:
Page 411 and 412:
■ Quartz is a Silicon Oxide (SiO
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SiO3-Silicon Quartz
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Lithium Sulphate LiSO 4 硫酸锂
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■ Barium Titanate (BaTiO 3 ) are
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BaTiO 3
Page 421 and 422:
Fig. 3: Comparison between PZT (lef
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■ Lead Zirconate Titanate (PBZrO
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350°C is also goof for:
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350°C is also goof for:
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Lead zirconium Titanate is an inter
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http://www.ndt.net/article/platte2/
Page 434 and 435:
Ceramic Transducer
Page 436 and 437:
Q68: Which of the following transdu
Page 438 and 439:
Q73: Which of the following is the
Page 440 and 441:
Transducer
Page 442 and 443:
3.2.1 Transducer Cut-Out A cut away
Page 444 and 445:
Transducer
Page 446 and 447:
Transducer: Angle Beam
Page 448 and 449:
3.2.2 The Active Element (Crystal)
Page 450 and 451:
Matching Layer: Immersion & Delay T
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Note on Backing: The backing materi
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Matching Layer (Wear Plate) For imm
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Transducers
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3.2.6 Transducer Efficiency, Bandwi
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2 λ 50% Amplitude or 6dB line. 2
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3.2.6.2 Transducer Damping It is al
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Transducer (Backing) Damping: • H
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Transducer Damping
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Transducer Damping at -20dB
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Transducer Damping
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Wave form Duration at -10dB
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Transducer Damping- High Damping (X
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3.2.6.3 Bandwidth: It is also impor
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The central frequency will also def
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Bandwidth (BW) - the difference bet
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Transducers are constructed to with
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Instrumentation Filtered Band Width
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Q8: Receiver noise must often be fi
Page 489 and 490:
Q48: The approximate bandwidth of t
Page 491:
Since the ultrasound originates fro
Page 494 and 495:
Near Field
Page 496 and 497:
Angular characteristics: Lines of e
Page 498 and 499:
Angular characteristics: Sound-pres
Page 500 and 501:
For a piston source transducer of r
Page 502 and 503:
Spherical or cylindrical focusing c
Page 504 and 505:
Probe Dimension & Spread angle 探
Page 506 and 507:
Probe dimension & Z f , , Ɵ 探
Page 508 and 509:
3.4: Transducer Beam Spread As disc
Page 510 and 511:
As shown in the applet below, beam
Page 513 and 514:
Beam angle is an important consider
Page 515 and 516:
3.5: Transducer Types Ultrasonic tr
Page 517 and 518:
Contact Transducers
Page 519 and 520:
Contact Transducer http://www.olymp
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3.5.2 Immersion transducers In imme
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Focusing Ration in water/steel (F=4
Page 525 and 526:
Focal Length Equation: The focal le
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Focal Length Variations
Page 529 and 530:
Cylindrical & Spherical Focused
Page 531 and 532:
Q79: What type of search unit allow
Page 533 and 534:
Q78: Which of the following is not
Page 535 and 536:
For a single crystal probe the leng
Page 537 and 538:
There are other advantages 1. Doubl
Page 539 and 540:
Advantages: Improves near surface r
Page 541 and 542:
Duo Elements Transducer Transmittin
Page 543 and 544:
3.5.4 Delay line transducers provid
Page 545 and 546:
Other Reading (Olympus): Delay Line
Page 547:
Delay lined Transducer
Page 550 and 551:
Probe Delay with TR-Probe
Page 552 and 553:
Probe Delay
Page 554 and 555:
Delay Line UT 1 Lab 8 www.youtube.c
Page 556 and 557:
Angle Beam Transducers- Angle beam
Page 558 and 559:
Page 560 and 561:
Page 562 and 563:
Page 564 and 565:
Page 566 and 567:
Angle Beam Transducers ϴ 1L ϴ 2L
Page 568 and 569:
Angle Beam Transducers- Mode Conver
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Angle Beam Transducers- Common Term
Page 572 and 573:
Angle Beam Transducer http://www.ol
Page 574 and 575:
Application of Normal incidence she
Page 576 and 577:
Normal incidence shear wave transdu
Page 578 and 579:
Q: To evaluate and accurately locat
Page 580 and 581:
Q: A special scanning device with t
Page 582 and 583:
3.6: Transducer Testing Some transd
Page 584 and 585:
TRANSDUCER EXCITATION As a general
Page 586 and 587:
Square Wave Spiked Pulser: (negativ
Page 588 and 589:
UT Flaw Detector - Olympus EPOCH 60
Page 590 and 591:
Effects of Probe Frequencies: 1. Hi
Page 594 and 595:
As noted in the ASTM E1065 Standard
Page 596 and 597:
Relative Pulse-Echo Sensitivity--Th
Page 598 and 599:
Sound Field Measurements--The objec
Page 600 and 601:
There is ongoing research to develo
Page 602 and 603:
3.8: Couplants A couplant is a mate
Page 604 and 605:
Immersion Method - Water as a coupl
Page 606 and 607:
Squirter Column (bubbler)- Water as
Page 608 and 609:
Couplant
Page 610 and 611:
Electromagnetic-acoustic transducer
Page 612 and 613:
EMAT
Page 614 and 615:
Electromagnetic acoustic transducer
Page 616 and 617:
3. Dry Inspection. Since no couplan
Page 618 and 619:
Applications of EMATs EMAT has been
Page 620 and 621:
Cross-sectional view of a spiral co
Page 622 and 623:
Cross-sectional view of a tangentia
Page 624 and 625:
EMATS The bulk-shear-wave EMAT cons
Page 626 and 627:
Cross-sectional view of a periodic
Page 628 and 629:
3.10: Pulser-Receivers Ultrasonic p
Page 630 and 631:
Transducer Cut-out
Page 632 and 633:
Pulse Length: BS4331 Pt2. N= Pulse
Page 634:
Pulse Length: A long pulse length m
Page 637 and 638:
Pulse Length
Page 639 and 640:
Pulse Length
Page 641 and 642:
Pulse-Length and Wave form Quality
Page 643 and 644:
Pulse Length- x axis time domain Qu
Page 645 and 646:
Pulse-echo mode of operation, wideb
Page 647 and 648:
Sensitivity in pulse-echo mode of o
Page 649 and 650:
Damping: Shock wave transducer and
Page 651 and 652:
The pulser-receiver is also used in
Page 653 and 654:
Transducers of the kind most common
Page 655 and 656:
Bandwidth - Typical transducers for
Page 657 and 658:
In fact, the actual beam profile is
Page 659 and 660:
Attenuation - As it travels through
Page 661 and 662:
3.11: Tone Burst Generators In Rese
Page 663 and 664:
Tone burst generators http://www.se
Page 665 and 666:
Section of biphase modulated spread
Page 667 and 668:
3.13: Electrical Impedance Matching
Page 669 and 670:
Cable Electrical Characteristics Th
Page 671 and 672:
Capacitance in a cable is usually m
Page 673 and 674:
Quality Factor “Q”
Page 675 and 676:
3.15: Data Presentation Ultrasonic
Page 677 and 678:
Data Presentation:
Page 679 and 680:
In the A-scan presentation, relativ
Page 681 and 682:
A-Scan http://static3.olympus-ims.c
Page 683 and 684:
3.15.2 B-Scan http://static2.olympu
Page 685 and 686:
B-Scan http://static2.olympus-ims.c
Page 687 and 688:
It should be noted that a limitatio
Page 689 and 690:
Q: In a B-scan display, the length
Page 691 and 692:
C-Scan The (1) relative signal ampl
Page 694 and 695:
C-Scan / A-Scan
Page 696 and 697:
C-Scan
Page 698 and 699:
C-Scan Recording
Page 700 and 701:
The D scan- The D scan gives a side
Page 702 and 703:
3.15.5 The Through Transmission Sha
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Fig. 12.1 Principle of the shadow m
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3.15.6 Other Presentations
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3.16.2 Through Transmission Techniq
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The Through Transmission Shadow Met
Page 713 and 714:
The Tandem Techniques Phased array:
Page 715 and 716:
During the set-up of immersion meth
Page 717 and 718:
3.17 UT Equipment Circuitry & Contr
Page 719 and 720:
Instrument Circuitry: Time base The
Page 721 and 722:
Instrument Circuitry: Power Supply.
Page 723 and 724:
Instrument Circuitry: Signal-condit
Page 725 and 726:
Instrument Circuitry: Clock The clo
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Instrument Circuitry: Pulser-Receiv
Page 729 and 730:
Instrument Control: REJECT Control
Page 731 and 732:
Instrument Control: GAIN Control Th
Page 733 and 734:
• A control that varies the level
Page 735 and 736:
• High-voltage or low-voltage dri
Page 737 and 738:
3.17.3 Pulse-Echo Instrumentation (
Page 739:
3. The voltage pulse reaches the tr
Page 742 and 743:
Typical block diagram of an analog
Page 744 and 745:
3.17.4 B Scan Block diagram: B-scan
Page 746 and 747:
Typical B-scan setup, including vid
Page 748 and 749:
• Third, echoes are indicated by
Page 750 and 751:
3.17.5 C-scan display C-scan displa
Page 752 and 753:
System Setup. In a basic C-scan sys
Page 754 and 755:
Q79: In the pulse echo instrument,
Page 756 and 757:
Q1: The rate generator in B-scan eq
Page 758 and 759:
Q129: An A-scan display, which show
Page 760 and 761:
Q32: On many ultrasonic testing ins
Page 762 and 763:
123. In a basic pulse echo ultrason
Page 764 and 765:
3.18 Further Reading on Sub-Section
Page 766 and 767:
In this picture there is two differ
Page 768 and 769:
This picture shows how water waves
Page 770 and 771:
3.18.4 Diffraction
Page 772 and 773:
Diffraction
Page 774 and 775:
Diffraction
Page 776 and 777:
Diffraction
Page 778 and 779:
This diagram shows an interference.
Page 780 and 781:
Interference
Page 782 and 783:
3.19 Questions & Answers
Page 784 and 785:
Q12: The 1 MHz transducer that shou
Page 786 and 787:
Q4. Calibration of ultrasonic equip
Page 788 and 789:
Discussion Topic: Factors affecting
Page 790:
Experts at Work-Salute!
Page 794 and 795:
Content: Section 4: Calibration Met
Page 796 and 797:
Calibrations
Page 798 and 799:
This section will discuss some of t
Page 800 and 801:
The IIW Type Calibration Block
Page 802 and 803:
The IIW Type 2 Calibration Block
Page 804 and 805:
EN12223:1999 Calibration Block
Page 806 and 807:
The IIW Calibration Block 1 st Chec
Page 808:
The IIW Calibration Block 2 nd Chec
Page 812 and 813:
The IIW Phase Array Calibration Blo
Page 814 and 815:
The IIW 2 Calibration Block Check f
Page 816 and 817:
Calibration Blocks- Area Amplitude
Page 818 and 819:
IIW Blocks- US-1 IIW Type US-1
Page 820 and 821:
IIW Blocks- IIW Type Mini
Page 822 and 823:
IIW type blocks are used to calibra
Page 824 and 825:
A block that closely resembles the
Page 826 and 827:
DSC AWS Block
Page 828 and 829:
AWS Shear Wave Distance Calibration
Page 830 and 831:
The DC AWS Block is a metal path di
Page 832 and 833:
The RC Block is used to determine t
Page 834 and 835:
Miniature Resolution Block The mini
Page 836 and 837:
Distance/Sensitivity (DS) Block The
Page 838 and 839:
The ASTM basic set of Area/Distance
Page 840 and 841:
Distance/Area-Amplitude Blocks Dist
Page 842 and 843:
Area-Amplitude Blocks Area-amplitud
Page 844 and 845:
Key Words: Distance Amplitude Block
Page 846 and 847:
Q: A primary purpose of a reference
Page 848 and 849:
DAC Curve
Page 850 and 851:
DAC- Distance Amplitude Correction
Page 853 and 854:
A distance amplitude correction cur
Page 855 and 856:
DAC Java http://www.ndt-ed.org/Educ
Page 857 and 858:
Sequence for constructing a DAC cur
Page 859 and 860:
Back Wall Echo Sweep 2” / Distanc
Page 861 and 862:
3.) Position the transducer over th
Page 863 and 864:
5.) To complete the DAC curve conne
Page 865 and 866:
DAC Curve
Page 867:
Gain Control for FSH: It should be
Page 870 and 871:
Alta Vista UT Calibration DAC Curve
Page 872 and 873:
Exit Point A2 Block
Page 874 and 875:
Q16: Notches are frequently used as
Page 876 and 877:
Probe Angles- A2 Block
Page 878 and 879:
4.2.4: Calibration of shear waves f
Page 880 and 881:
1 st Echo from circular Section
Page 882 and 883:
Calibration of shear waves for rang
Page 884 and 885:
25 mm radius from V2 Block
Page 886 and 887:
100 mm radius from K2 Block
Page 888 and 889:
Shear Wave Distance Calibration IIW
Page 890 and 891:
4.2.5: Dead Zone Determine the dead
Page 892 and 893:
4.2.6: 20 dB Profile- A5 Block
Page 894 and 895:
20 dB Profile Probe Beam Sound Pres
Page 896 and 897:
Example: 0 degree Probe Calibration
Page 898 and 899:
TRANSFER & ATTENUATION CORRECTION:
Page 900 and 901:
4.2.8: Linearity Checks (Time Base
Page 902:
Tolerance Unless otherwise specifie
Page 908 and 909:
4.2.8.2: Linearity of Equipment Gai
Page 912:
5.2.8.3-1: Linearity of vertical di
Page 915 and 916:
4.2.8.3-2: Linearity of vertical di
Page 918 and 919:
4.2.9: Time Correction Gain (TCG) P
Page 920 and 921:
Q29: Test sensitivity correction fo
Page 922 and 923:
Convex surfaces work to defocus the
Page 924 and 925:
convex surfaces work to defocus the
Page 926 and 927:
Q: In an immersion method, the inci
Page 928 and 929:
A curvature correction curve can be
Page 930 and 931:
The plot to the right shows an exam
Page 932 and 933:
A table of correction values and th
Page 934 and 935:
Curvature Correction
Page 936 and 937:
An important source of practice cod
Page 938 and 939:
Spherical reflectors are often used
Page 940 and 941:
4.5: Questions & Answers Exercises
Page 942 and 943:
Q6: The Notches are frequently used
Page 944 and 945:
Birring NDT Series, UT of Welds Par
Page 950 and 951:
Section 5: Measurement Techniques
Page 952 and 953:
Expert at works
Page 954 and 955:
d 1 = v½t d 2 = v½t = d 1 +d 2 2v
Page 956 and 957:
A Scan http://www.ndt-ed.org/Educat
Page 958 and 959:
In thickness gauging, ultrasonic te
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A-Scan http://www.ndt-ed.org/Educat
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A-Scan http://www.ndt-ed.org/Educat
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Flaw Location and Echo Display
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Near Surface Detectability with Ang
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Flaw Location with Angle Beam Trans
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Flaw Location with Angle Beam Trans
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Why angle beam assemblies are used
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http://www.olympus-ims.com/en/appli
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Sound energy that is transmitted fr
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Selecting the right angle beam asse
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The IIW recommends the use of a con
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High temperature wedges Standard an
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5.3: Reflector Sizing There are man
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Crack height (a) is a function of t
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5.3.2 6 dB Drop Sizing- For Large R
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6 dB Drop Method
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6 dB Drop Method
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20 dB Drop Method
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Construction of a beam edge plot -2
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Now find the 25mm hole and maximise
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Construction of a beam edge plot -2
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5.3.5 Maximum Amplitude Techniques
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5.4: Automated Scanning Ultrasonic
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The most common ultrasonic scanning
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It is often desirable to eliminate
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5.5: Precision Velocity Measurement
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Precision Velocity Measurements (us
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The most important application of E
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Time Measurement Technique Fourier
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Relative measurements such as the c
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Attenuation: A o U t A
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5.7: Spread Spectrum Ultrasonics Sp
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Two significant applications of Spr
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2. Piece-part assembly line environ
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EMATs with Spread Spectrum Ultrason
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Display Time/Magnitude domain Frequ
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Fourier Analysis
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Fourier Analysis
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Fourier Analysis
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5.9.1 Pulse Echo Method
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Pulse Echo Method
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Pulse Echo Method- Schematic screen
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Pulse Echo Method- Multiple echoes
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Influence of Shadow on axial defect
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Influence of reflector size on sign
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Pulse Echo Method s Probe Sound tra
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5.9.2.1 Pitch-Catch Methods- Throug
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Pitch-Catch Methods- Through Transm
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Figure 1 shows the relationship bet
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Video on Through Transmission Metho
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Immersion Methods For immersion tes
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Immersion Methods- The water path s
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Modified Immersion Methods - Irriga
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Straight Beam Immersion Methods 1 2
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Angle Beam Immersion Methods- Weld
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Immersion Testing Set-up
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Manipulators Bridge Bridge Manipula
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Wands / Support Tubes The support t
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Immersion Testing Set-up Manipulato
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Other Reading (Olympus)- Angle Beam
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Unfocused transducer By definition,
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Video on Immersion Testing www.yout
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Q1: Which of the following scanning
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Q2: Using the immersion method, a d
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38. The component in a conventional
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Scanning Patterns
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PRR- Pulse Repetitive Frequency/Rat
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Pulse Repetition Rate and Penetrati
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Q186: The maximum scanning speed po
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Transducer Interference- Transducer
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Specimen Surface Interference ? ?
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Mode Conversion Interference The mo
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Non Relevant Indications Transducer
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Non Relevant Indication Large grain
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5.13: Entry Surface Variables Entry
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In addition to reduced coupling, wh
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Unless done properly, removal of su
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5.13.2 Surface Coatings Surface coa
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Thickness Measurement with Surface
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Attenuation of couplants varies wit
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Table 8.2 For example the plastics
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5.13.4 More Reading: What is Neper
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Hence the Neper and dB are related
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Q31: Rough surfaces can cause undes
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Scanning Speed: Scanner speed = (PR
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Q1: A tubular product is tested by
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Q3: Minimum number of hits required
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Q5: What is the maximum PRR is need
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Q7: A steel plate size 6.2 m ×1.8
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Q8: Assume that the minimum PRR is
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The 6 dB Method For Large Reflector
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Q1 What is the correct water path b
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Q5: When dissimilar metal welds is
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Section 6: Selected Applications &
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6.11: Casting 6.12: Inspection of b
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6.1.0 Flaw Orientation: Parallel /
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Q28. A crack 13mm that is 13mm (0.5
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Casting Defects & Discontinuities
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Casting Defects & Discontinuities -
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Micro-shrinkage is usually many sma
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Casting Defects & Discontinuities-
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Casting Defects & Discontinuities -
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6.1.2 Processing Defects & Disconti
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Expert at works
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Processing Defects & Discontinuitie
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Processing Defects & Discontinuitie
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Q9: The preferred method of ultraso
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Welding Defects & Discontinuities
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Welding Defects & Discontinuities-
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6.1.4 Service Induced Defects & Dis
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Service Induced Defects & Discontin
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Figure 4-26 - Metallographic cross-
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Figure 4-37 - High magnification ph
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Figure 4-57 - Vibration induced fat
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Figure 5-1 - Localized amine corros
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Figure 5-3 - Preferential weld corr
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Figure 5-47 - Carbonate cracking ad
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Figure 5-49 - Most cracks originate
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6.2: Rail Inspection
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The need for a better inspection me
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Transverse Fissure
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One of the methods used to inspect
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Techniques: Examples of axles with
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6.3: Weldments (Welded Joints)
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UT of Weldments (Welded Joints) F s
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Flaw Detection- Depth Determination
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T = Plate Thickness ϴ = Shear wave
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Flaw Detection- Triangulations of r
Page 1252:
To determine the proper scanning ar
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Expert at works
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Typically scanning patterns
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Weld Scanning
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Weld Scanning
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Echo Dynamic- Position of Defects
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Plate Weld Scanning
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Plate Weld Scanning
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Practice Makes Perfect 52. One of t
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6.4: Pipe & Tube
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Pipe & Tube
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Pipe Scanning
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Pipe Scanning 48.59 o max 30 o max
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Pipe Scanning
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Pipe Scanning- thickness/OD ratio W
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Pipe Scanning- Contact Methods
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Q: Calculate the maximum shear wave
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Q35: During immersion testing of pi
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6.5: Echo Dynamic
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6.5.1 Basic echodynamic pattern of
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C.1 Pattern 1 Point-like reflector
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C.2 Pattern 2 Extended (elongated)
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C.3 Pattern 3a Extended (elongated)
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C.3 Pattern 3b Oblique incidence, t
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C.3 Pattern 3b Oblique incidence, t
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C.4 Pattern 4 Multiple reflector re
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Echodynamic- Change of echo height
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Break Time
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Echo Dynamic of Discontinuity- Flaw
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Echo Dynamic of Discontinuity- Impr
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Echo Dynamic of Discontinuity- Refl
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Echo Dynamic of Discontinuity- Tand
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Echo Dynamic of Discontinuity- Tand
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Echo Dynamic- Root Concavity
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Echo Dynamic
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Echo Dynamic
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Echo Dynamic- Broad indication with
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Echo Dynamic
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Echo Dynamic The echo response from
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Echo Dynamic Typical Echo Dynamic P
Page 1341 and 1342:
Echo Dynamic Typical Echo Dynamic P
Page 1343 and 1344:
Q183. In immersion testing, irrelev
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Q46. Which best describes a typical
Page 1347 and 1348:
Crack Macro- Air filled Crack has g
Page 1349 and 1350:
Inclusion Macro- Nonmetallic Inclus
Page 1351 and 1352:
Q46. A smooth flat discontinuities
Page 1353 and 1354:
Expert at works
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Physical Dimension
Page 1357 and 1358:
Physical Dimension
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Reporting: Basic Pin Information
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Reporting: Scanning Report - Bottom
Page 1363 and 1364:
Mock-Up
Page 1365 and 1366:
Mock-Up
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Reporting: Basic Pin Information
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Pitch and Catch Methods- Echo Dynam
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Pitch and Catch Methods- Echo Dynam
Page 1373 and 1374:
6.7.1 Determination of Microstructu
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A test program had been first carri
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6.7.4 Elastic Modulus Measurement A
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Elastic Modulus Measurement- Poisso
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Rubber cannot be characterized ultr
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The test sample may be of any geome
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Testing Procedure: Velocity Measure
Page 1387 and 1388:
Note on units: If sound velocity is
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Experts at work
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This application note contains quic
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Temperature Limitation: Conventiona
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High Temperature Conventional UT- G
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(1a) Thickness gauging The most com
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In challenging applications requiri
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Applications involving thin materia
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Note that normal incidence shear wa
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2.3 Test Techniques The following f
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Coupling Technique: The combination
Page 1413 and 1414:
3.0 High Temperature Testing and Va
Page 1415 and 1416:
3.2 Zero Recalibration: When perfor
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Keyword: • In typical fine grain
Page 1419 and 1420:
Discussion: An offshore installatio
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6.9.1 Dimension-Measurement Applica
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Pulse-echo thickness gages with a d
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With oil at the correct level, suff
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In another position measurement sys
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Q144. A thin sheet may be inspected
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In-Service Inspection The methods d
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In-Service Inspection- Oblique or s
Page 1437 and 1438:
In-Service Inspection- (a) Probe fo
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In-Service Inspection- (a) Cross-se
Page 1441 and 1442:
Casting In castings flaw detection
Page 1443 and 1444:
Casting
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6.12: Bonded Joint
Page 1447 and 1448:
During inspection, the oscilloscope
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Bond Testing: BondMaster 1000e+
Page 1451 and 1452:
The BondMaster 1000e+.
Page 1453 and 1454:
OmniScan MX ECA/ECT: Advanced Compo
Page 1455 and 1456:
Advanced Composite Inspection Olymp
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Encoded system: any two-axis encodi
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OmniScan MX ECA/ECT
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6.13: Corrosion Monitoring
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Despite these drawbacks, ultrasonic
Page 1465 and 1466:
Crack Monitoring Laboratory and in-
Page 1467 and 1468:
The use of pulse-echo techniques fo
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6.15: Stress Measurements
Page 1471 and 1472:
The real limitation of this techniq
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6. App-1: TOFD Introduction NOTE: N
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TOFD provides a wide area of covera
Page 1477 and 1478:
TOFD offers rapid weld inspection w
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Due to the low amplitude of the dif
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Tips Diffractions
Page 1483 and 1484:
TOFD
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TOFD has been used for some time fo
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Figure 5-2 - Hot Lean Amine Corrosi
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For these types of weld inspections
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Scan of weld with cursor positioned
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Measurement of good area shows thic
Page 1495 and 1496:
6.11.3.3TOFD for Corrosion Measurem
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TOFD for Weld- TOFD Parallel Scanni
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■ Perpendicular Scanning Scanning
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Typical “Perpendicular” Weld Sc
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■ Benefit of TOFD Parallel Scanni
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The Experts at work.
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Break Time mms://a588.l3944020587.c
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Break Time
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Section 7: Reference Materials
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7.1: UT Material Properties Acousti
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7.3: Video Time
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Section 8: Ultrasonic Inspection Qu
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8.1: Ultrasonic Inspection Quizzes
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Ultrasonic Inspection Quizzes http:
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https://www.nde-ed.org/EducationRes
Page 1528:
http://www.studyblue.com/notes/note
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Normal Beams Calibration Techniques
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Attenuation Due to Beam Spread: Lar
Page 1539 and 1540:
Material Attenuation Determination:
Page 1541 and 1542:
IF zero Material attenuation: The s
Page 1543 and 1544:
Material Attenuation in 100mm = YdB
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Construction of Beam Edges:
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The other edge:
Page 1549 and 1550:
Construction of beam spread at 25mm
Page 1551 and 1552:
Angle Beams Calibration Techniques
Page 1553 and 1554:
Perspex as Matching Layer/Wedge 1.
Page 1555 and 1556:
First/ Second Critical Angles 27.56
Page 1557 and 1558:
Finding the probe index
Page 1559 and 1560:
Calibration for range:
Page 1561 and 1562:
Angle Beam- Beam edges Proving (Ver
Page 1563 and 1564:
Angle Beam- Beam edges Proving (Ver
Page 1565 and 1566:
The Proofing: Plot out the Stand-Of
Page 1567 and 1568:
Angle Beam- Beam edges Proving (Hor
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Angle Beam- Beam edges Proving (Hor
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The DAC
Page 1573 and 1574:
DAC Curve
Page 1575 and 1576:
DAC Curve Plot 1. Obtained the sign
Page 1577 and 1578:
FLAT Bottom Holes FBH
Page 1579 and 1580:
FLAT Bottom Holes FBH A type of ref
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Transfer Correction: Reference surf
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Transfer Correction: Reference surf
Page 1585 and 1586:
Transfer Correction: Comparison of
Page 1587 and 1588:
Transfer Correction: Angle Probes M
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FLAT Bottom Holes FBH ■ DGS/AVG D
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(Curve #1) represents the relative
Page 1593 and 1594:
As implemented in contemporary digi
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More reading on DGS
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DGS # of near field
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DGS-If you have a signal feom a fla
Page 1601 and 1602:
Locating reflectors with an angle-b
Page 1603 and 1604:
Scanning Patterns
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Scanning Patterns
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Scanning Patterns
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Scanning Patterns
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Scanning Patterns
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Scanning Patterns
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Scanning Patterns
Page 1617:
Scanning Patterns
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Practice Makes Perfect 81. The 100
Page 1625 and 1626:
Addendum-01b Equipment Calibration
Page 1627 and 1628:
The Circuitry: • Voltage activati
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Pulse-Echo Instrumentation Pulser C
Page 1631 and 1632:
Pulse-Echo Instrumentation The Puls
Page 1633 and 1634:
Pulse-Echo Instrumentation PULSER T
Page 1635 and 1636:
Pulse-Echo Instrumentation CLOCK GE
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Pulse-Echo Instrumentation Increasi
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Pulse-Echo Instrumentation The Tran
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PULSER TGC UNIT MEMORY TRX TRS RF R
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Pulse-Echo Instrumentation Electric
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Pulse-Echo Instrumentation Amplitud
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Pulse-Echo Instrumentation Primary
Page 1649 and 1650:
Pulse-Echo Instrumentation TGC Cont
Page 1651 and 1652:
Pulse-Echo Instrumentation KNEE MAX
Page 1653 and 1654:
Pulse-Echo Instrumentation The slid
Page 1655 and 1656:
Pulse-Echo Instrumentation Frequenc
Page 1657 and 1658:
Pulse-Echo Instrumentation Wide-ban
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Pulse-Echo Instrumentation DYNAMIC
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Pulse-Echo Instrumentation RF ampli
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Pulse-Echo Instrumentation LOGARITH
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Pulse-Echo Instrumentation R-F ampl
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Pulse-Echo Instrumentation REJECTIO
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Pulse-Echo Instrumentation SIGNAL P
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Pulse-Echo Instrumentation RECTIFIC
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Pulse-Echo Instrumentation Full-Wav
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Pulse-Echo Instrumentation Smoothin
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Pulse-Echo Instrumentation DIGITAL
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Pulse-Echo Instrumentation 4. Digit
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Matrix Columns, y coordinates
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10x 10y X, Y ADDRESS 8x 7y 5x 5y 3x
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X X X X X X X X X X X X
Page 1689 and 1690:
50 50 50 50 50 50 50 50 50 50 50 50
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Pulse-Echo Instrumentation DIGITAL
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Pulse-Echo Instrumentation Echoes d
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Pulse-Echo Instrumentation Gray Sca
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Pulse-Echo Instrumentation % Availa
Page 1699 and 1700:
Pulse-Echo Instrumentation 9 7 8 8
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Pulse-Echo Instrumentation Zoom Mag
Page 1703 and 1704:
Pulse-Echo Instrumentation Data Pre
Page 1705 and 1706:
65. In Figure 3, transducer A is be
Page 1707 and 1708:
68. When the incident angle is chos
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Q: In a UT test system where signal
Page 1711 and 1712:
Q: The intended purpose of the adju
Page 1716 and 1717:
Trigonometry http://www.mathwarehou
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1.0 Material Acoustic Properties Ma
Page 1721 and 1722:
Ultrasonic Formula
Page 1723 and 1724:
3.0 Properties of Acoustic Plane Wa
Page 1725 and 1726:
What properties of material affect
Page 1727 and 1728:
Where V is the speed of sound, C is
Page 1729 and 1730:
5.0 Attenuation The amplitude chang
Page 1731 and 1732:
Attenuation can be determined by ev
Page 1733 and 1734:
Attenuation is generally proportion
Page 1735 and 1736:
7.0 Acoustic Impedance Sound travel
Page 1737 and 1738:
Reflection/Transmission Energy as a
Page 1739 and 1740:
Using the above applet, note that t
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Practice Makes Perfect Following ar
Page 1743 and 1744:
Q2: What is the percentage of sound
Page 1745 and 1746:
Snell’s Law http://education-port
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Practice Made Perfect 7. Snell's la
Page 1749 and 1750:
Practice Makes Perfect 11. Calculat
Page 1751 and 1752:
The following formula relates some
Page 1753 and 1754:
10. Near/ Far Fields http://miac.un
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Modified Near Zone T Perspex Modifi
Page 1759 and 1760:
Apparent Near Zone distance
Page 1761 and 1762:
The focal length F is determined by
Page 1763 and 1764:
Calculate the offset for following
Page 1765 and 1766:
14.0 Inverse Law and Inverse Square
Page 1768 and 1769:
Inverse Law: For large reflector, r
Page 1770 and 1771:
- Distance Gain Size is a method of
Page 1772 and 1773:
In the general diagram the size of
Page 1774 and 1775:
Example: If you has a signal at a c
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More on DGS/AVG by Olympus http://w
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As implemented in contemporary digi
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Figure2:
Page 1783 and 1784:
16.0 Immersion Testing of Circular
Page 1785:
Maximum ϴ ϴ max = Sin -1 (ID/OD)
Page 1791 and 1792:
Uncertain Questions 21. Which type
Page 1793 and 1794:
RC- Resolution Calibration Block
Page 1795 and 1796:
17. Surface waves are used to detec
Page 1797 and 1798:
45. When examining thin materials f
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Mistake Made ----------------------
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Mistake Made ----------------------
Page 1803:
Questions & Answers
Page 1806 and 1807:
Chapter 1: Physical Principles Q1-1
Page 1808 and 1809:
Q1-20 Two plate yield different bac
Page 1810 and 1811:
Q1-15 At a water-Aluminum interface
Page 1812 and 1813:
Chapter 2: Equipment Q2-5 A 5MHz 0.
Page 1814 and 1815:
Q2-14 What is the offset required,
Page 1816 and 1817:
Q2-18 In Fig.29 what is the rate of
Page 1818 and 1819:
Q2-21 Two signals were compared to
Page 1820 and 1821:
Charter 3: Common Practices Q3-6 In
Page 1822 and 1823:
Always Check the units correctly!!!
Page 1824 and 1825:
Smart Engineer do not made mistake
Page 1826 and 1827:
Smart Himba Girl do not made mistak
Page 1828 and 1829:
Smart Papua New Guianese do not mad
Page 1830 and 1831:
Q3-11 When using a focued, straight
Page 1832 and 1833:
Q3-23 A air filled #3 FBH 0.5” in
Page 1834 and 1835:
Q4-12 Answer: First calculate the p
Page 1836 and 1837:
Q4-15 Answer: Offset = T.tan70 x Nu
Page 1838 and 1839:
Q4-17 Answer: Total length of axial
Page 1840 and 1841:
Q4-18 Answer:
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Break! mms://a588.l3944020587.c3944
Page 1844 and 1845:
Q5-22 Answer: Class C
Page 1847 and 1848:
5. At a solid to free boundary, an
Page 1849 and 1850:
13. An oscilloscope display in whic
Page 1851 and 1852:
17. Transducer focal lengths are no
Page 1853 and 1854:
53. An ultrasonic instrument contro
Page 1855 and 1856:
72. When conducting an immersion te
Page 1860 and 1861:
Standards Answer: C
Page 1862 and 1863:
Standards Answer: A
Page 1864 and 1865:
Standards Answer: A
Page 1866 and 1867:
Standards Answer: B
Page 1868 and 1869:
Standards Answer: C
Page 1871 and 1872:
Arrows shown standard correct answe
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Study Blueeeeeeee… 28 th July 201
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mms://a588.l3944020587.c39440.g.lm.
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Calculation: Incident angle= 7° Re
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Practices Make Perfect
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Questions More Reading & on Answers
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Inverse Law and Inverse Square Law
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Echo Amplitude- Reflector Size “D
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Addendum-04A Questions & Answers on
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Content: Exercise 1 Exercise 2 Expe
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Questions & Answers
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Practices Make Perfect
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Questions More Reading & on Answers
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Ultrasonic Formula
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Inverse Law and Inverse Square Law
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Echo Amplitude- Reflector Size “D
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Addendum-04B Questions & Answers- I
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Production Platform http://www.stud
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Content: 1. Exercise 01 - Studyblue
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1. The wave mode that has multiple
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5. When angle beam contact testing
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9. The random distribution of cryst
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13. In immersion testing, the near
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17. As frequency increases in ultra
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Popey http://192.81.248.91:8095/
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23. Lamb waves can be used to detec
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27. Using the immersion method, a d
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31. Ultrasonic wheel units may be u
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35. Which circuit triggers the puls
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39. In immersion testing in a small
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42. In an automatic scanning immers
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43. When adjusting the flaw locatin
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47. Compensation for the variation
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51. Gas discontinuities are reduced
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55. As transducer diameter decrease
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59. Attenuation is a difficult quan
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63. Delay-tip (stand-off) type cont
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66. In Figure 3, transducer C is be
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70. The angle at which 90 degrees r
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74. For aluminum and steel, the lon
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78. In inspecting a 102 mm (4 in) d
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81. The process of adjusting an ins
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WPS/PQR
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87. In ultrasonic testing, the time
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91. Which of the following modes of
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95. A testing technique in which th
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99. Mechanical and electrical stabi
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101. The formula on the right is us
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105. The product of the sound veloc
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109. What kind of waves travel at a
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112. Properties of shear or transve
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117. Generally, the best ultrasonic
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121. In an ultrasonic instrument, t
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125. In a basic pulse echo ultrason
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129. Compression waves whose partic
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133. The refraction angle of longit
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137. The velocity of sound is the l
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141. The acoustic impedance is: A.
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145. A discontinuity that occurs du
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149. A point, line, or surface of a
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152. The equation describing wavele
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155. Of the piezoelectric materials
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159. The wavelength of an ultrasoni
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163. Lamb waves may be used to insp
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167. The primary requirement of a p
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171. Reflection indications from a
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Break- On my treat should I pass! 2
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175. Waves that travel around gradu
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177. An ultrasonic instrument has b
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Frequency = 2.25 MHZ, Wavelength λ
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180. When using tow separate transd
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Steel Making http://www.tatasteelin
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185. In cases where the diameter of
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189. To prevent the appearance of h
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193. Rayleigh waves: A. Are generat
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197. The technique of examining an
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201. In immersion shear wave testin
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Chicken Satay Fest
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Exercises Studyblue-02 http://www.s
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3. The only significant sound wave
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Reading: http://www.freezingblue.co
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Production Platform
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Some body make this up, He had neve
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Practice 1: Source: http://www.scri
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Q27. If E is the bulk modulus of a
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Q35. in case of ultrasonography, je
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Q1. Which of the following is a ref
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Q5. Look at diagram one at the foot
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Q9. Of the following sound waves mo
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Q13. Attenuation is a difficult qua
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Q17. The speed with which ultrasoni
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Here are answers: 1. A side drilled
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Q35: Couplant used in contact testi
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Preparatory Notes for ASNT NDT Level III Examination - Ultrasonic Testing, UT

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