Characterization of Retrogression and Re-Aging Heat Treatment of AA7075-T6 Using Nonlinear Acoustics and Eddy Current

Journal Article · Thu Feb 26 00:00:00 EST 2004 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1711742· OSTI ID:20632898

Ananthula, Rajeshwar ^[1]; Ko, Ray T ^[2]; Sathish, Shamachary; Blodgett, Mark ^[3]

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1. Center for Materials Diagnostics, University of Dayton Research Institute, Dayton, Ohio 45469 (United States)
2. Structural Integrity Division, University of Dayton Research Institute, Dayton, Ohio 45469 (United States)
3. Metals, Ceramics, and NDE Division, Air Force Research Laboratory, Wright-Patterson Air Force Base, OH 45433 (United States)

Nonlinear acoustic parameter and eddy current methods have been utilized to characterize the heat treatment process of retrogression and re-aging of aluminum 7075-T6. The results of nonlinear acoustic parameter measurements show two distinct peaks at 30 minutes and 45 minutes of retrogression time. The phase of the through-thickness eddy current signal shows a minimum at 42 minutes of retrogression time. Application of combined methods for identifying the optimized properties in the material is discussed.

• OSTI ID: 20632898
• Journal Information: AIP Conference Proceedings, Vol. 700, Issue 1; Conference: 30. annual review of progress in quantitative nondestructive evaluation, Green Bay, WI (United States), 27 Jul - 1 Aug 2003; Other Information: DOI: 10.1063/1.1711742; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACOUSTICS
AGING
ALUMINIUM
ALUMINIUM ALLOYS
EDDY CURRENT TESTING
EDDY CURRENTS
HEAT TREATMENTS
NONLINEAR PROBLEMS
OPTIMIZATION
THICKNESS
USES