Micromechanics of stress-induced martensitic transformation

This work proposes that the structure of a twinned martensite plate is dependent upon temperature and stress. The uniaxial tensile stress required to induce the formation of a martensite plate is predicted to be smaller than that calculated under the assumption that the plate has a fixed structure subject to the criterion of invariant plane strain (IPS). Using a mean field method, the analysis is extended to non-dilute martensite volume fraction in order to obtain a stress–strain curve for the deformation of a single crystal. The curve shows a decrease in stress as transformation progresses. The implication of this result is discussed.