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Measured Noise Levels in Honeywell Ti 6-4 Forging Coupons Noise Level (100 = #1 FBH in Ti 6-4) . 8.00 7.00 6.00 5.00 4.00 3.00 2.00 1.00 Red: Peak Noise Blue: Ave. Noise Honeywell Forging 9 AFT 1 10 4 6 7 8 FWD AFT (side 2) 5 6 2 5 3 OD 0.00 3 4 5 6 7 8 12 3 4 5 6 7 8 12 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 H1 H2 H3 H4 H6 H8 Coupon, and Quadrant Coupon, Inspection Direction, and Quadrant H5 H7 ID (side 4) 4 1 3 2 8 7 FWD (side 5) OD (side 1) Figure 3. Comparison of peak (red) and average (blue) gated-peak noise levels in the Honeywellsupplied Ti 6-4 forging coupons. Noise levels are relative to the amplitude of a (hypothetical) #1 FBH located at the same depth in Ti 6-4 material. For each coupon eight values are shown, corresponding to different combinations of inspection directions and analysis quadrant. AFT Honeywell Coupon#5 Side 4 Attenuation 9 1 2 10 4 6 5 3 OD Attenuation (Nepers/cm) 0.05 0.04 0.03 0.02 0.01 Full scan region Reduced scan region Power Law Fit fit is 0.00082 x freq 1.343 7 8 FWD 0.00 4 6 8 10 12 14 16 18 Frequency (MHz) Figure 4. Measured average attenuation curve and associated power-law fit for the highest-noise coupon from the Honeywell Ti 6-4 forging. The large arrow in the cross-sectional drawing of the forging identifies the coupon and inspection direction. A 10-MHz, 0.25”-diameter planar probe was used. Average results are shown for the full scan region (central 1.5” x 0.75” of the entry surface) and for a reduced-area region (central 1.25” x 0.50”). Multiply attenuation values by 22.06 to change to dB/inch units. Quarterly Report – January 1, 2002 –March 31, 2002 print date/time: 6/6/2002 - 8:39 AM – Page 39
FOM (std. units) 0.20 0.18 0.16 0.14 0.12 0.10 0.08 0.06 H5 Side 4 FOM (using meas. atten) Gate #1 Gate#2 Gate#3 Gate#4 Gate#5 gate#6 0.04 0.02 0.00 5.0 10.0 15.0 20.0 Frequency (MHz) RMS Noise (Volts) 0.030 0.025 0.020 0.015 0.010 0.005 HW5 Side 4 RMS Noise Gate Center Duration G1 2.61 us (0.32”) 2.55 us G2 3.61 us (0.44”) 1.27 us G3 4.61 us (0.56”) 1.27 us G4 5.61 us (0.69”) 1.27 us G5 6.61 us (0.81”) 1.27 us G6 3.90 us (0.48”) 5.11 us G1 G2 G3 G6 G4 G5 0.000 0 1 2 3 4 5 6 7 8 9 10 Time after Front Wall Echo (usec) Figure 5. Measured grain-noise FOM values, as functions of frequency, for the Honeywell highnoise forging coupon. The largest FOM values were seen for analysis Gate #3, centered about 0.56” below the entry surface. The locations of the various gates used in the analysis of noise A- scans are shown in the rightmost panel which displays the measured rms noise level as a function of time. A 15-MHz, F7 focused transducer was used, and the peak in the rms noise curve corresponds to scattering by grains located in the focal zone. Quarterly Report – January 1, 2002 –March 31, 2002 print date/time: 6/6/2002 - 8:39 AM – Page 40
Page 1 and 2: 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 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: (a) Transducer is: 15 MHz 0.5”-Di
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 and 62: Surface Finish Studies The plans fo
Page 63 and 64: Figure 4. Beam diameter determinati
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
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model parts across 17 micrograph pl
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Z Y X Figure 4. Angle View of Void
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Original Date Revised Date Descript
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A report documenting the relative e
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Project 3: Task 3.1: Subtask 3.1.2:
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naturally occurring flaws in forgin
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Milestones: Revised dates of TBD ar
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Original Date Revised Date Descript
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Project 3: Task 3.1: Subtask 3.1.3:
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7a-7l 6 8 9 10 Key additional ingre
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incorporating the results of the pr
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