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Nondestructive determination of mechanical propertiesThe sensitivity of the velocity of ultrasonic waves to the elasticity of the materials (acousto-elastic constant - AEC) as controlled by the microstructure of the materials was examined experimentally. Rolled-plate specimens of five different Al alloys were subjected to tensile tests while being monitored for the velocity change of a 10 MHz longitudinal wave as a function of the applied tensile stress. The acoustic propagation velocity was measured perpendicularly to the stress. Determinations were made of the yield strength and the hardnesses of the specimens. Samples of the plate materials examined microscopically to characterize the solid phases. The AECs varied linearly with the percentage of solid solution phase of the alloys. The trend for strain-hardened samples was, however, opposite from that in the precipitation-hardened alloys. The results underscore the necessity of considering the microstructural dependencies of the AECs when using ultrasonic NDE methods, and also opened the potential of determining some mechanical properties with NDE techniques.
Document ID
19860056870
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Schneider, E.
(Houston Univ. TX, United States)
Chu, S.-L.
(Houston Univ. TX, United States)
Salama, K.
(Houston, University TX, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1985
Subject Category
Metallic Materials
Accession Number
86A41608
Funding Number(s)
CONTRACT_GRANT: NAG1-338
Distribution Limits
Public
Copyright
Other

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