应变诱发马氏体首先在原奥氏体晶界和孪晶界形核。
These lath martensite first nucleates in parent austenite intergranular and twin boundary.
实验表明，珠光体分解在奥氏体晶界形核，铁素体和渗碳体具有位向关系。
Experiments show that pearlitic nucleus can form on the austenitic grain boundary, and there is the orientation relationship between ferrite and cementite also.
裂纹形核主要是通过位错堆积、晶界角源及弹性各向异性三种机理产生的。
Nucleation of crack is due to dislocation pile-up mechanism and elastic anisotropy mechanism.
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