Phaseconstitutions of Fe-(20-30)wt"/•Mn-(0-10)wt"I•Al-Calloys have been investigated by electron probe micro- analysis and transmission electron microscopy.The phase relations between austenite and perovskite carbide, (Fe, Mn)3AIC in the temperature range of 900-1 200'C have been carefully examined.An L12-type ordered structure, which was reported to be formed in rapidly solidified alloys as a metastable phase has not been detected in specimensaged at temperatures above 600'C.
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Ishida et al. (1990) studied this question.
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