Acoustic Emission and Shape Memory Effect in the Martensitic Transformation

TL;DR

This paper demonstrates that a 2D model of martensitic transformation replicates acoustic emission patterns and shape-memory effects observed during thermal cycling, linking microscopic signals to macroscopic shape recovery.

Contribution

The study introduces a two-dimensional model that captures acoustic emission signals and shape-memory behavior during martensitic transformations, providing insights into their underlying mechanisms.

Findings

Model reproduces acoustic emission reproducibility.

Model shows shape-memory effect during thermal cycling.

Correlations between signals and morphological changes are established.

Abstract

Acoustic emission signals are known to exhibit a high degree of reproducibility in time and show correlations with the growth and shrinkage of martensite domains when athermal martensites are subjected to repeated thermal cycling in a restricted temperature range. We show that a recently introduced two dimensional model for the martensitic transformation mimics these features. We also show that these features are related to the shape-memory effect where near full reversal of morphological features are seen under these thermal cycling conditions.