A New Kinetic Mode During the Austenite-to-Ferrite Transformation in Fe-Mn and Fe-Mn-Mo Alloys

• 作者: Chi Zhang Cong-Yu Zhang Hao Chen Jia-Ning Zhu Zhi-Gang Yang
• 来源期刊: 金属学报（英文版）
• 年，卷（期）: 2020,（7）
• 页码范围: 975-980
• 页数: 6页
• 语种: 英文

摘要

The kinetics of isothermal austenite (γ)-to-ferrite (α) transformation at various temperatures in Fe-2Mn and Fe-2Mn-0.5Mo (wt％) alloys is investigated via dilatometry experiments and phase-field modeling.It was interestingly found that Mo addition has a marginal effect on the transformation kinetics.Besides the well-known partitioning and partitionless transformation modes,a new kinetic mode,in which interface migration is controlled by interfacial diffusion,was identified.The phase-field model with considering interfacial segregation could well predict the transformation kinetics and the kinetic mode transition.