Metastable austenitic stainless steels undergo deformation induced transformation to bcc martensitic structure during cold-working. The martensite induced reverts to austenite at a relatively low temperature and this leads to the formation of ultra fine austenite grains of less than I ,lm in diameter. In this paper, the effect of pre-cold-working on the morphology of reversed austenite was investigated by means of transmission electron microscopy and tensile test. The alloy used is an Fe-1 8.080/0Cr-8.650/0Ni alloy. Since this alloy has metastable austenitic structure at room temperature, it almost transforms to lath-martensite by 500/0 Cold-rolling.
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Takaki et al. (1994) studied this question.