【摘要】 在晶体缺陷周围存在着应力场,一些特殊位置的应变为马氏体相变形核提供了预应变,是马氏体形核的有利位置.初生马氏体的形成可诱发储存于晶体内的弹性能的释放,以弹性波的形式在晶体中传播.在一定的条件下,弹性模软化,为后继马氏体形核提供预应变.马氏体是在存在预应变的情况下形核.更多还原

【Abstract】 Stress field around the dislocation in crystal result in prestrain for the nucleation of martensitic transformation, so the nucleation is preferentially initiated at the sits around the dislocation. The elastic wave is induced by releasing the elastic strain energy after forming the first martensites. Under some conditions, the elastic wave soften, which provide the prestrain for the nucleation of the following martensitic transformation. So the nucleation depend on prestrain.更多还原