Phase Equilibria in Fe-Mn-Al-C Alloys

Kiyohito Ishida; Hiroshi Ohtani; Naoya Satoh; Ryosuke Kainuma; Taiji Nishizawa

doi:10.2355/isijinternational.30.680

Kiyohito Ishida, Hiroshi Ohtani, Naoya Satoh, Ryosuke Kainuma, Taiji Nishizawa

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Keywords: phase diagram, Fe-Mn-Al-C system, perovskite carbide, modulated structure

JOURNAL FREE ACCESS

1990 Volume 30 Issue 8 Pages 680-686

DOI https://doi.org/10.2355/isijinternational.30.680

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Abstract

Phase constitutions of Fe-(20-30)wt%Mn-(0-10)wt%Al-C alloys have been investigated by electron probe microanalysis and transmission electron microscopy. The phase relations between austenite and perovskite carbide, (Fe, Mn)₃AlC 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 specimens aged at temperatures above 600°C.

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