Continuum modeling of strain-induced martensitic transformation at shear-band intersections

A mesoscopic continuum thermomechanical approach is applied to the problem of strain-induced martensitic transformation at shear-band intersection. A computed transformation work functional combined with a critical driving fo rce criterion and stability analysis are employed in the solution of bounda ry-value problems addressing aspects of martensitic transformations in a he terogeneous plastically deforming medium. Under boundary displacement contr ol, solutions demonstrate preferred transformation at shear-band intersecti ons, restricted growth beyond intersections, preferred transformation durin g rather than after intersection process, and sequential rather than simult aneous operation of multiple intersections of identical potency. Further gr owth beyond intersections is favored under fixed stress boundary conditions . Mesoscopic thermomechanical considerations offer useful insights into tra nsformation behavior in a plastic environment. (C) 1998 Acta Metallurgica I nc. Published by Elsevier Science Ltd. All rights reserved.