Engine Titanium Consortium - Center for Nondestructive Evaluation ...

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the high-noise coupons shown in the figure, resulting in 30.6%, 43.0% and 36% for the PW, HW and GE coupons respectively. In addition to the S/N measurements, sonic pulse volumes were also measured. First, the –6dB beam diameter at the FBH depth was determined from a fine increment C-scan of the reference hole in the PW coupon. Figure 4 illustrates the beam diameter determination for the same example, leading to a value of 39.4 mils. Secondly, as illustrated in Figure 5, the pulse duration was measured by finding the –6 dB points for the envelope function of the rectified FBH echo, and this duration was translated to a pulse length in metal. For the case shown, the pulse length was 36.7 mils, leading to a measured pulse volume of (π/4)(39.4 mils) 2 (36.7mils) = 44,600 cubic mils. Peak noise vs. pulse volume for all measurements is summarized in Figure 6. PW8 Max. noise 30.6% HW5 Max noise 43% GE6 Max. noise 36% #1/2 FBH ~ 80% Figure 3. Example of S/N measurements in high-noise forging coupons. Here the FBH holes are located at the focus of an F6 transducer. Quarterly Report – January 1, 2002 –March 31, 2002 print date/time: 6/6/2002 - 8:39 AM – Page 61
Figure 4. Beam diameter determination for the case of an F6 transducer focused on the FBHs. All pixels with amplitudes within 6 dB of the maximum are located, and their joint area is measured. 125 F6 - Reference Waveform at Focus 100 F6-0dB-Rect F6-0dB-Env Amplitude 75 50 25 0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 Microseconds Figure 5. Pulse duration determination for the case of an F6 transducer focused at the FBH depth. The full width of the envelope at the –6 dB level (50% of maximum) is 0.150 microseconds. Quarterly Report – January 1, 2002 –March 31, 2002 print date/time: 6/6/2002 - 8:39 AM – Page 62
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Engine Titanium Consortium Quarterl
Page 3 and 4:
Project 1: Task 1.1: Subtask 1.1.1:
Page 5 and 6:
findings for the first billet studi
Page 7 and 8:
measured P(L) curve, and tabulate t
Page 9 and 10:
1.2 1.0 0.8 V-DIE-A coupon "D" (axi
Page 11 and 12: Attenuation (dB/in) . Waspalloy Att
Page 13 and 14: Deliverables: Fundamental propertie
Page 15 and 16: Small Diameter Billet Assessment: A
Page 17 and 18: Under normal circumstances one woul
Page 19 and 20: Plans (April 1, 2002 - June 30, 200
Page 21 and 22: Project 1: Task 1.2: Subtask 1.2.1:
Page 23 and 24: system will be at GE, and evaluatio
Page 25 and 26: fixed-focus transducers that were n
Page 27 and 28: Back-Wall Scan FBH scan 20% 57% 49%
Page 29 and 30: 63% Back-Wall Scan 74% FBH scan 58%
Page 31 and 32: Figure 6. Noise and target amplitud
Page 33 and 34: Original Date Revised Date Descript
Page 37 and 38: Objective/Approach Amendments: Obje
Page 39 and 40: (a) Transducer is: 15 MHz 0.5”-Di
Page 41 and 42: FOM (std. units) 0.20 0.18 0.16 0.1
Page 43 and 44: Peak> Range of Ave. Range of Peak G
Page 45 and 46: The average noise characteristics,
Page 47 and 48: Noise C-scans through the “Flat S
Page 49 and 50: 4.0” Convex Block; Flat Side Insp
Page 51 and 52: % FSH Noise Measurements from flat
Page 53 and 54: Original Revised Description Status
Page 57 and 58: possible candidates. Development wo
Page 59 and 60: Forging Calibration Standard #1 1.7
Page 61: Surface Finish Studies The plans fo
Page 65 and 66: size was adequate to support a 0.04
Page 67 and 68: phased array instruments. The desig
Page 71 and 72: Task 2: Task 2.1: Subtask 2.1.1: In
Page 73 and 74: Objective/Approach Amendments: Obje
Page 75 and 76: Figure 2. A preliminary design of t
Page 77 and 78: Publications and Presentations: Dat
Page 79 and 80: Survey of common practices (industr
Page 81 and 82: include air drying, oven drying, an
Page 83 and 84: aluminum oxide blasting is conceali
Page 89 and 90: the methodology. These may be thoug
Page 91 and 92: model parts across 17 micrograph pl
Page 93 and 94: Z Y X Figure 4. Angle View of Void
Page 97 and 98: A report documenting the relative e
Page 101 and 102: naturally occurring flaws in forgin
Page 103 and 104: Milestones: Revised dates of TBD ar
Page 109 and 110: 7a-7l 6 8 9 10 Key additional ingre
Page 111 and 112: incorporating the results of the pr
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