作者
Arnab Sarkar, Souriddha Sanyal, Tapas K Bandyopadhyay, Sumantra Mandal
发表日期
2019/11/8
期刊
Materials Science and Engineering: A
卷号
767
页码范围
138402
出版商
Elsevier
简介
Structure-property relationship in a Ti-added medium Mn multicomponent steel has been studied and compared with a Ti-free variant of same composition. Both the steels with initial ferrite-austenite microstructure were subjected to cold rolling, followed by annealing treatment at 1073K for 3 and 50 min. The Ti-modified steel shows good strength-ductility combination after 50 min of annealing. In contrast, a reverse trend is observed in the Ti-free variant where strength-ductility relationship ameliorates after 3 min annealing. The remarkable strength in the Ti-free variant originates from the higher volume fraction of Mn5(Al,Si)C precipitates having larger lattice misfit, higher fraction of deformed grains and finer ferrite grain size. The presence of Ti as a microalloying element in the Ti-modified steel instigates the formation of Ti-rich intermetallic carbide precipitates which refine the ferrite grain size during extended …
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