Abstract
Martensitic transformation kinetics and microstructural effects are correlated in a study of transformation cycling in a Cu-Zn-AI alloy. During the first few cycles of martensitic transformation and reversion, vestigial features develop in the parent phase. During these same cycles, the parent-to-martensite transformation temperature range shifts upward by several degrees and the martensite-to-parent reversion temperature range shifts down by about a degree, in effect reducing the transformation hysteresis. The vestigial ridge features are associated particularly with burst martensite phenomena, and this and other manifestations of imperfect thermoelastic martensite behavior during initial cycling lead to the kinetics changes. These changes virtually stabilize after 20 to 25 transformation cycles as the martensitic transformation achieves a completely reproducible pattern, both in terms of microstructure and kinetics.
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Perkins, J., Bobowiec, P. Microstructural effects of martensitic transformation cycling of a Cu-Zn-Al alloy: Vestigial structures in the parent phase. Metall Trans A 17, 195–203 (1986). https://doi.org/10.1007/BF02643895
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DOI: https://doi.org/10.1007/BF02643895