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The modeling of the transformation and deformation behavior of a shape memory alloy has been investigated in various researchers. However, there are few reports that investigated plastic deformation of shape memory alloys. In case an actual product is designed, the modeling in consideration of plastic deformation is indispensable. In this work, plastic deformation after predeformation is considered using the volume fraction of slipdeformed martensite. New kinetics and constitutive equations for the reverse transformation process are proposed. The material constants in the proposed equations are determined from the results of tensile and heating/cooling tests on Ti50 atNi alloy. The calculated results describe well the deformation and transformation behavior affected by prestrain.

Constitutive Equation in Consideration with Slip-Deformed Martensite after Deforming of Ti-Ni Shape Memory Alloy