应用分子动力学方法和NiAl合金的嵌入原子势（EAM）；模拟研究了位错偶上马氏体形核长大的过程和微观机理．计算结果表明，马氏体形核的位置与位错应力场的分布有关．马氏体总是在位错偶应力场中的一些特殊位置优先形核，因为这些位置的应力状态有利于完成从奥氏体向马氏体转变的点阵畸变．在马氏体长大过程中，在相变应变的驱动下，其中一根位错逐渐向下滑移，起到了塑性协调的作用 The molecular dynamics method and the embedded atomic potential (EAM) of NiAl alloy were used to simulate the process and microscopic mechanism of nucleation and growth of disordered dual martensite. The calculation results show that the location of martensite nucleation is related to the distribution of dislocation stress field. The martensite always preferentially nucleates at some special locations in the field of dislocated and even stress because the stress states at these locations are conducive to the completion of the lattice distortion that changes from austenite to martensite. In the process of martensite growth, driven by the phase transformation strain, one of the dislocations gradually slides downward to play a plastic and coordinative role