Engine Titanium Consortium - Center for Nondestructive Evaluation ...

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Major Accomplishments and Significant Interactions: Date Feb. 7-8, 2000 April 2000 May 2000 June 2000 July 2000 August 2000 September 2000 December 2000 February 2001 June 2001 October 2001 December 2001 February 2002 April 2002 Description Technical Kick-off meeting. Completion of literature search and industry survey. Cleaning and drying methods, and typical contaminants of concern for study were identified and listed. Experimental parameters were established for engineering studies. The matrix of these parameters are being finalized by the sub-team. Necessary crack samples and need for fabrication were defined. A list of these samples are being generated. Established partnerships with airlines to perform onsite evaluation of cleaning. Definitions for typical titanium and nickel based engine hardware contaminates. OEM etch solutions compared. Experimental parameter write-up completed. Detailed procedure for etch study completed. Sample fabrication complete. Drying study performed at airline overhaul facility. Initial cleaning study performed at airline overhaul facility. “Baked on” contamination of samples completed. Cleaning study performed at airline overhaul facility. Completed cleaning study data generation. Team meeting to analyze results and arrive at preliminary conclusions. Publications and Presentations: Date Sept. 28, 2000 Description Status Update to 44 th Annual Air Transport Association NDT Forum Quarterly Report – January 1, 2002 –March 31, 2002 print date/time: 6/6/2002 - 8:39 AM – Page 85
Project 3: Task 3.1: Subtask 3.1.1: Inspection Systems Capability Assessment and Validation POD Methodology Applications POD of Ultrasonic Inspection of Billets Team Members: HW: Tim Duffy, Andy Kinney, Waled Hassan ISU: Thomas Chiou, Bill Meeker, Bruce Thompson, Frank Margetan, Tim Gray, Ron Roberts, Lisa Brasche GE: Dick Burkel, Bob Gilmore, Jon Bartos, Mike Keller, Dave Copley, Ed Nieters, Walt Bantz PW: Jeff Umbach, Kevin Smith, Taher Aljundi, Andrei Degtyar Students: V. Chan Program initiation date: June 15, 1999; All effort unrelated to the RDB was stopped on March 17, 2000. On March 14, 2001, guidance was received regarding resumption of the technical work on subtask 3.1.1 with the initial activity being the revision of program schedules and technical path to account for the RDB results. Objectives: • To enhance the ability to estimate the POD of naturally-occurring defects, such as hard-alpha inclusions in titanium billet, under a variety of inspection scenarios, through identification of a standard recommended approach for adjusting the parameters of the flaw response model to match the properties of natural-flaw populations. • To verify that the new POD methodology improves on the accuracy of existent techniques, provides more information such as PFA, and can be reliably applied to circumstances other than those of the actual experimental measurements as influenced by changing individual inspection parameters such scan index, transducer properties, etc. • To verify that the new POD methodology provides sensible predictions using more limited data than is possible with existent techniques. • To provide the OEM’s with tools to allow implementation of the new methodology in internal damage tolerance analyses by increasing the user-friendliness of methodology software and associated flaw and noise response models. • To provide the best available estimates of titanium billet POD by means of periodical updates to existing estimates based on new information such as new flaw data and extension of the POD estimates to a wider range of typical billet diameters. • To provide to the aircraft engine industry the first estimates and a capability for further estimating POD for ultrasonic inspection of nickel billet that is comparable to that provided by the new SNR-based POD methodology for titanium billet. Quarterly Report – January 1, 2002 –March 31, 2002 print date/time: 6/6/2002 - 8:39 AM – Page 86
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Engine Titanium Consortium Quarterl
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Project 1: Task 1.1: Subtask 1.1.1:
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findings for the first billet studi
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measured P(L) curve, and tabulate t
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1.2 1.0 0.8 V-DIE-A coupon "D" (axi
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Attenuation (dB/in) . Waspalloy Att
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Deliverables: Fundamental propertie
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Small Diameter Billet Assessment: A
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Under normal circumstances one woul
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Plans (April 1, 2002 - June 30, 200
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Project 1: Task 1.2: Subtask 1.2.1:
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system will be at GE, and evaluatio
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fixed-focus transducers that were n
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Back-Wall Scan FBH scan 20% 57% 49%
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63% Back-Wall Scan 74% FBH scan 58%
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Figure 6. Noise and target amplitud
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Original Date Revised Date Descript
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Page 41 and 42: FOM (std. units) 0.20 0.18 0.16 0.1
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Page 61 and 62: Surface Finish Studies The plans fo
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Page 67 and 68: phased array instruments. The desig
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Page 75 and 76: Figure 2. A preliminary design of t
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Page 81 and 82: include air drying, oven drying, an
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Page 89 and 90: the methodology. These may be thoug
Page 91 and 92: model parts across 17 micrograph pl
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