Exploration of the hysteresis of martensite-austenite transition in bulk \beta-Cu-Zn-Al single crystals

2025/10/20 by Oneil Goisot, Goisot, O., H. Vanlandeghem +11
Materials Science · #Shape Memory Alloy Transformations #Ferroelectric and Piezoelectric Materials #Metallurgical and Alloy Processes

paper · pdf · doi:10.48550/arxiv.2510.17297

Abstract

Improvement of functional and structural fatigue endurance for applications of ferroelastic materials requires an optimization of their composition. A strategy for finding alloy compositions that minimize the transformation hysteresis is necessary. We propose an experimental high throughput methodology to explore the model \beta-Cu-Zn-Al system. It is based on an original route to process bulk gradient composition single crystals to investigate fine variation of composition range coupled with local measurements of the austenite-martensite microstructure by light microscopy during the transformation. The latter method is compared with differential scanning calorimetry measurements. The methodology is applied in an Al-richer range of composition of standard CuZnAl SMA where a minimum of transformation hysteresis is observed.

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