Journal of Intelligent Material Systems and Structures

 

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This version was published on January 1, 2008
Journal of Intelligent Material Systems and Structures, Vol. 19, No. 1, 43-46 (2008)
DOI: 10.1177/1045389X06073304

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

Ashish Khandelwal

General Motors R&D India Science Lab, Bangalore, India

Vidyashankar R. Buravalla

General Motors R&D India Science Lab, Bangalore, India, vidyashankar.buravalla{at}gm.com

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.

Key Words: Shape memory alloy • evolution kinetics • martensitic phase transformation.


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