Abstract
The phase transformations in an Fe‐8Al‐30Mn‐1.5Si‐1.5C alloy has been investigated by means of transmission electron microscopy. In the as-quenched condition, the microstructure of the alloy was austenite phase containing fine (Fe,Mn) 3AlC carbides. The fine (Fe,Mn) 3AlC carbides were formed during quenching by a spinodal decomposition. When the as-quenched alloy was aged at temperatures ranging from 550 to 1000C, the phase transformation sequence as the aging temperature increased was found to be (Fe,Mn)3AlC carbide C D03 ! .Fe; Mn/3AlC carbideC B2 ! .Fe; Mn/3AlC carbideC ! . This transformation has never before been observed in the Fe‐Al‐Mn‐C and Fe‐Al‐Mn‐Si‐C alloys. © 2001 Elsevier Science B.V. All rights reserved.
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