A continuum model for a metal that recrystallizes during the deformation history

Unusual response characteristics have been observed in materials due to recrystallization. This could be important for structures exposed to elevated temperatures and subjected to stresses beyond the yield point. In the research reported herein, a phenomenological theory is developed for a material that strain-hardens and recrystallizes during the deformation history. Specifically, the objective is to develop an understanding of the kinematics, energy balance, dissipation and constitutive equations for a material that experiences significant microstructural changes. An internal state variable approach to constitutive modeling is used to account for these changes. Of particular interest is the development of the evolution equations for the internal state variables. (orig.)