Theory of phase transformation and reorientation in single crystalline shape memory alloys

Jiujiang Zhu, N. G. Liang, M. Cai, K. M. Liew, W. M. Huang

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A constitutive model, based on an (n+1)-phase mixture of the Mori–Tanaka average theory, has been developed for stress-induced martensitic transformation and reorientation in single crystalline shape memory alloys. Volume fractions of different martensite lattice correspondence variants are chosen as internal variables to describe microstructural evolution. Macroscopic Gibbs free energy for the phase transformation is derived with thermodynamics principles and the ensemble average method of micro-mechanics. The critical condition and the evolution equation are proposed for both the phase transition and reorientation. This model can also simulate interior hysteresis loops during loading/unloading by switching the critical driving forces when an opposite transition takes place.
Original languageEnglish
Article number 015041
JournalSmart Materials and Structures
Volume17
Issue number1
DOIs
Publication statusPublished - Feb 2008

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