CRITERION FOR THE PROGRESS OF MARTENSITIC-TRANSFORMATION IN A FINITE-ELEMENT SIMULATION

Martensitic transformation process is considered to be controlled by t he driving energies, i.e. chemical free energy and mechanical driving force, and ''resistive energies'', i.e. the interaction energy associa ted with the transformation and interfacial energy. In this study, a t wo dimensional finite element simulation is set up in order to describ e the microstructural and mechanical behaviour during martensitic tran sformation. A transformation criterion that considers both the mechani cal driving force and the interaction energy is taken into account. Th e effect of these two terms on the development of the plate orientatio ns inside the grain is analysed in an elastic material.