UT Testing-Section 6 Selected Applications & Techniques

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Micro-shrinkage is usually many small subsurface holes that appear at the gate of casting / can also occur when molten metal must flow from a thin section into thicker section of casting. Blow hole are small hole at the surface of the casting caused by gas which comes from the mold itself. (wet sand mould forming steam resulting in blowhole) Porosity is caused by entrapped gas. It is usually subsurface or surface depending on the mold design.
Casting Defects & Discontinuities
Page 1: Section 6: Selected Applications &
Page 5 and 6: 6.11: Casting 6.12: Inspection of b
Page 7 and 8: 6.1.1 Casting Defects & Discontinui
Page 9 and 10: Casting Defects & Discontinuities-
Page 11: Casting Defects & Discontinuities
Page 31 and 32: Processing Defects & Discontinuitie
Page 39: 6.1.3 Welding Defects & Discontinui
Page 42 and 43: Welding Defects & Discontinuities
Page 48 and 49: Welding Defects & Discontinuities-
Page 60 and 61: Service Induced Defects & Discontin
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Figure 4-24 - In a carbon steel sam
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Figure 4-36 - Weld detail used to j
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Figure 4-38 - Failure of DMW joinin
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Figure 4-58 - Cross-sectional view
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Figure 5-2 - Hot Lean Amine Corrosi
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Figure 5-46 - Overhead interstage k
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Figure 5-48 - Metallographic sample
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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
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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
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Echo Dynamic Typical Echo Dynamic P
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Q183. In immersion testing, irrelev
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Q46. Which best describes a typical
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6.6: Technique Sheets
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Hanger Pin Testing using Shear Wave
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Physical Dimension
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Physical Dimension
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Reporting: Scanning Report - Top of
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Mock-Up
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Mock-Up
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Mock-Up
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Hanger Pin Testing using Shear Wave
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Pitch and Catch Methods- Set-up
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6.7: Material Properties- Elastic M
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6.7.2 The attenuation method The at
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6.7.3 Velocity Measurements Velocit
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Elastic Modulus Measurement - Young
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These basic material properties, wh
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Equipment: The velocity measurement
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Testing Procedure: Equipment Used.
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Velocity & Equations Poisson Ratio
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6.8: High Temperature Ultrasonic Te
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1.0 Background: Although most ultra
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Temperature Limitation: Conventiona
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敦煌大漠美食 -50 度火
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2.0 Methods used for H.Temperature
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For precision thickness gauging app
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(1b) Flaw detection As in high temp
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2.2 High Temperature Couplants Most
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Keyword: Note that normal incidence
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As a general rule, if the outer cas
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2.4 Equipment Functions Freeze Func
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Keyword: ■ ■ Velocity change of
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3.3 Increased Attenuation: Sound at
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3.4 Angular Variation in Wedges: Wi
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6.9: Dimension-Measurement Applicat
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6.9.2 Thickness measurements are ma
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6.9.3 Position measurements Positio
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Fig. 60 Method of determining corre
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Fig. 61 Setup for determining the p
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6.10: In-Service Inspection
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In-Service Inspection- Testing for
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In-Service Inspection- (a) Crack te
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In-Service Inspection- (a) Testing
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6.11: Casting
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Casting- Typical casting defects an
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Casting- Detection of shrinkage cav
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Inspection of Bonded Joints If the
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6.13: Corrosion Monitoring
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Despite these drawbacks, ultrasonic
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Crack Monitoring Laboratory and in-
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The use of pulse-echo techniques fo
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6.15: Stress Measurements
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The real limitation of this techniq
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The real limitation of
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6.App-1: TOFD Introduction NOTE: No
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TOFD provides a wide area of covera
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TOFD offers rapid weld inspection w
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Due to the low amplitude of the dif
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Tips Diffractions
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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
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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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UT Testing-Section 6 Selected Applications & Techniques

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