In situ monitoring of plastic deformation using ultrasound

2015/08/10 by Vicente Salinas, Fernando Lund, Salinas, Vicente +5
Engineering · Materials Science · Physics and Astronomy · #FOS: Physical sciences #High-Velocity Impact and Material Behavior #Materials Science (cond-mat.mtrl-sci) #Non-Destructive Testing Techniques #Ultrasonics and Acoustic Wave Propagation #cond-mat.mtrl-sci

paper · pdf · doi:10.48550/arxiv.1508.02112

6 pages, 4 figures

arxiv created 2015/08/10 · openalex publication_date 2015/08/10 · arxiv updated 2015/08/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Ultrasound has long been used as a non-destructive tool to test for the brittle fracture of materials. Could it be used as a similar tool to test for ductile failure? This study reports results of local measurements of the speed of shear waves, v_T, in aluminum under standard testing conditions at two different locations on the same sample, as a function of stress. There is a clear change in v_T at the Yield stress, consistent with a proliferation of dislocations. This measurement provides a quantitative, continuous relation between dislocation density and externally applied stress.

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