| A New Kinetic Mode During the Austenite-to-Ferrite Transformation in Fe–Mn and Fe–Mn–Mo Alloys |
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| 基金项目： | Yang acknowledges the financial support from the National Natural Science Foundation of China;Zhang acknowledges the financial support from the National Natural Science Foundation of China;the National Magnetic Confinement Fusion Energy Research Project of China;Z.-G;the Beijing Natural Science Foundation;Chen acknowledges the financial support from National Natural Science Foundation of China |
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| 摘 要： | The kinetics of isothermal austenite(γ)-to-ferrite(α) transformation at various temperatures in Fe-2 Mn and Fe-2 Mn-0.5 Mo(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.
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| 收稿时间： | 2019-10-26 |
A New Kinetic Mode During the Austenite-to-Ferrite Transformation in Fe-Mn and Fe-Mn-Mo Alloys |
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| Authors: | Cong-Yu Zhang Hao Chen Jia-Ning Zhu Chi Zhang Zhi-Gang Yang |
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| Affiliation: | 1. Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China |
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| Abstract: | 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. |
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| Keywords: | Steel Austenite Ferrite Diffusion Solute drag |
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