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Measuring Dislocation Density in Aluminum with Resonant Ultrasound Spectroscopy

Research paper by Felipe Barra, Andres Caru, Maria Teresa Cerda, Rodrigo Espinoza, Alejandro Jara, Fernando Lund, Nicolas Mujica

Indexed on: 11 Aug '08Published on: 11 Aug '08Published in: Physics - Materials Science



Abstract

Dislocations in a material will, when present in enough numbers, change the speed of propagation of elastic waves. Consequently, two material samples, differing only in dislocation density, will have different elastic constants, a quantity that can be measured using Resonant Ultrasound Spectroscopy. Measurements of this effect on aluminum samples are reported. They compare well with the predictions of the theory.