Effect of heat treatment on martensitic transformation in Fe�??12.5%Mn�??5.5%Si�??9%Cr�??3.5%Ni alloy

[摘要] In this study, thermally-induced martensitic transformation ($gamma(fcc) ightarrow varepsilon(hcp)$) in Feâ€�??12.5%Mnâ€�??5.5%Siâ€�??9%Crâ€�??3.5%Ni (weight) alloy was studied by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The effect of cooling rate was investigated. It was observed that fast cooled sample exhibited regular overlapping of stacking faults and ðœ�? martensite plates were formed parallel to each other. TEM investigations showed that the orientation relationship between 𝛾–𝜀 phases corresponds to Shojiâ€�?�Nishiyama type orientation relationship.

[学科分类] 材料工程

[关键词] Martensitic transformation;Feâ€�?�Mnâ€�?�Siâ€�?�Crâ€�?�Ni;grain size;ðœ�? martensite.