Investigation on the formation mechanism of ordered carbide (FeMn)3AlC in the Al added twinning-induced plasticity steels

The spinodal composition zone in Al added Fe-Mn-Al-C twinning-induced plasticity (TWIP) steels can be determined by contents of Al and C and aging temperature together, based on the thermodynamic analysis. Precipitation of ordered (FeMn) 3 AlC carbide by the mechanism of spinodal decomposition occur...

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Bibliographic Details
Published in:Shanghai jiao tong da xue xue bao 2016-08, Vol.21 (4), p.406-410
Main Authors: Yang, Lieduo, Huang, Feng, Guo, Zhenghong, Rong, Yonghua, Chen, Nailu
Format: Article
Language:English
Subjects:
Architecture
Computer Science
Electrical Engineering
Engineering
Life Sciences
Materials Science
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Summary:The spinodal composition zone in Al added Fe-Mn-Al-C twinning-induced plasticity (TWIP) steels can be determined by contents of Al and C and aging temperature together, based on the thermodynamic analysis. Precipitation of ordered (FeMn) 3 AlC carbide by the mechanism of spinodal decomposition occurs in the C-rich and Al-rich zone with low aging temperature. Increase of aging temperature shrinks spinodal composition zone to the high Al and C contents. As a result, the precipitation of (FeMn) 3 AlC carbide alters from spinodal decomposition to classical nucleation-growth manner gradually. Further calculation indicates that the diffusion of Al can play a key role in determining the growth rate of (FeMn) 3 AlC carbide at high aging temperature.
ISSN:1007-1172
1995-8188
DOI:10.1007/s12204-016-1739-7