A Correction to the Brinson's Evolution Kinetics for Shape Memory Alloys

• Published in: Journal of intelligent material systems and structures Vol. 19; no. 1; pp. 43 - 46
• Main Authors: Khandelwal, Ashish, Buravalla, Vidyashankar R.
• Format: Journal Article
• Language: English
• Published: London, England SAGE Publications 01-01-2008; Technomic
• Subjects: Condensed matter: structure, mechanical and thermal properties; Equations of state, phase equilibria, and phase transitions; Exact sciences and technology; Physics; Solid-solid transitions; Specific phase transitions; Shape memory alloy; martensitic phase transformation; evolution kinetics; Phase diagrams; Phase transformations; Martensitic transformations; Kinetics; Thermal stresses
• ISSN: 1045-389X; 1530-8138
• DOI: 10.1177/1045389X06073304

Phase diagram based approach is frequently used to investigate the shape memory alloy behavior. Typically, evolution laws for the martensitic phase fraction are defined for different local transformation regions in the stress—temperature phase diagram. In the Brinson's evolution kinetics, under certain conditions, the local evolution law for the formation of martensitic fraction leads to inadmissible phase fraction (>1). This pertains to a case where both stress- and temperature-induced martensite evolve simultaneously. A modified evolution law is presented here to overcome this anomaly.