Simultaneously increasing both strength and ductility of Fe-Mn-C twinning-induced plasticity steel via Cr/Mo alloying

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• 作者：Shuai Liu^a ; ^b ; Lihe Qian^a ; ^b ; ^{dlhqian@yahoo.com" class="auth_mail" title="E-mail the corresponding author} ; Jiangying Meng^a ; Dongdong Li^a ; ^b ; Penghui Ma^a ; ^b ; Fucheng Zhang^a ; ^b
• 关键词：Twinning-induced plasticity steel ; Mechanical properties ; Strain hardening ; Cr/Mo alloying
• 刊名：Scripta Materialia
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：127
• 期：Complete
• 页码：10-14
• 全文大小：1783 K

文摘

The effects of Cr/Mo alloying on the tensile deformation behavior of Fe-Mn-C twinning-induced plasticity steel were investigated. The results showed that Cr/Mo alloying increases both the strength and ductility significantly and concurrently. As compared with the premature saturation of deformation twinning in the Cr/Mo-free steel, a unique twinning behavior occurs in the Cr/Mo-alloyed steel, i.e., retarded but more persistent formation of thinner twins with straining. This unique twinning behavior gives rise to a sustained high strain-hardening rate up to higher strains, which delays the plastic instability and increases both strength and ductility simultaneously.