Browsing by Author "Tuan, Yi Hsuan"

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Grain boundary precipitation in Fe-30Mn-9Al-5Cr-0.7C alloy
(2008-07-01)
Tuan, Yi Hsuan
;
Lin, Chih Lung
;
Chao, Chuen Guang
;
Liu, Tzeng Feng
;
材料科學與工程學系
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.