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金属及其合金在不同条件下(温度),具有不同的晶体结构。在发生变化结构的同时,不发生成分变化及分解,在本质上与元素的同素异性转变与化合物的多形性转变相同。这种相变可能概括称为金属及合金的多形性转变。然而马氏体相变又具有本身特点,即原子进行无扩散的位移,并新相与母相间存在以切变应力维持的点阵连续性。因此,马氏体相变又有别于一般金属中的同素异型性转变及化合物的多形性的转变和在某些合金中发生的块状转变。
Metals and their alloys have different crystal structures under different conditions (temperature). In the same time, there is no change of composition and decomposition in the structure of change. In essence, the allotment of elements and the polymorphic transformation of the compounds are the same. This phase change may be summarized as a polymorphic transition of metals and alloys. However, martensitic transformation has its own characteristics, that is, atoms without diffusion displacement, and the new phase and the mother there is shear stress maintained by the lattice continuity. Therefore, the martensitic transformation is different from the allotropic transformation in general metals and the polymorphic transformation of the compounds and the bulk transformation in some alloys.