Journal
MATERIALS TRANSACTIONS
Volume 49, Issue 7, Pages 1589-1593Publisher
JAPAN INST METALS
DOI: 10.2320/matertrans.MRA2008060
Keywords
transmission electron microscopy; carbides; ordering; austenitic iron aluminum manganese chromium carbon alloy
Funding
- National Science Council, Republic of China [NSC95-2221-E-009-086-MY3]
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The as-quenched microstructure of the Fe-30%Mn-9%Al-5%Cr-0.7%C (in mass%) alloy was single-phase austenite. When the as-quenched alloy was aged at 550 degrees C-750 degrees C, fine (Fe,Mn)(3)AlC carbides were formed within the austenite matrix. In addition, as the aging temperature increased, a M7C3 carbide + D0(3) -> M7C3 carbide + B-2 -> M7C3 carbide + alpha (ferrite) phase transition had occurred on the grain boundaries. This grain boundary precipitation behavior has never before been observed in FeMnAlC and FeMnAlCrC alloy systems.
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