A constitutive model for materials with microstructure evolution

A material model is proposed which captures microstructural changes in two phase materials with phase transitions. Using a homogenization technique, m acroscopic material properties are derived. A set of microstructural variab les is chosen to describe the micro geometry. Approximating the second phas e as an ellipsoidal inclusion with eigenstrain and interfacial energy the a ttempt is made to model the micro mechanics rather accurately. Results are shown for parameters that mimic Nickel base alloys.