本文计算了孪晶马氏体基体和孪生部份的应变张量,发现二者的切变分量大致相反,故应变能降低。马氏体片可依靠基体和孪晶间的自协作效应沿孪晶面的法问长大。根据对不同惯习面法线的位移矢量的分析,{10,3,15}f面可构成宏观的不变惯习面,而{575}f,{252}f和{111}f面则难以构成。 In this paper, the strain tensor of the twinned martensite matrix and the twin is calculated, and the shear components of the twin martensite are roughly opposite to each other, so the strain energy can be reduced. Martensitic films can rely on the self-cooperation between the substrate and the twins along the twin surface method to ask grow up. According to the analysis of the displacement vectors of different normal planes, the {10,3,15} f face can form a macroscopic invariant face, while the {575} f, {252} f and {111} f facets Difficult to form.