Measuring Dislocation Density in Aluminum with Resonant Ultrasound Spectroscopy

TL;DR

This paper demonstrates that Resonant Ultrasound Spectroscopy can effectively measure dislocation density in aluminum by detecting changes in elastic wave propagation, aligning well with theoretical predictions.

Contribution

It introduces a method to quantify dislocation density in aluminum using Resonant Ultrasound Spectroscopy, validated by experimental results.

Findings

Resonant Ultrasound Spectroscopy detects dislocation density changes.

Measured elastic constants match theoretical predictions.

Method offers a non-destructive way to assess dislocation density.

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.