変態潜熱の伝熱効果を考慮したマルテンサイト変態界面移動のフェーズフィールド解析

抄録

Shape memory effect in alloys is associated with the thermoelastic martensitic transformation. Similarly to the Stephan problem of ice making, the transformation latent heat may have some large influence on the kinetics of the martensitic transformation, which can be observed as the effect on the mobility of the austenite /martensite interfaces. Several authors have already confirmed the effect with experiments, but any theoretical argument has not yet been given. We studied the relaxation of the austenite phase undercooled below the transformation temperature by means of a simple one dimensional phase field model. For dealing with the heat effect, the one dimensional heat equation considering the heat conduction inside the model material and heat transfer from the surface was simultaneously solved with the phase field equation by the finite difference method.