Phase-Field Modeling of Austenite-to-Ferrite Transformation in Fe-C-Mn Ternary Alloys
文献类型：期刊论文
| 作者 | Zhang Jun1,2; Chen Wenxiong1; Zheng Chengwu1; Li Dianzhong1 |
| 刊名 | ACTA METALLURGICA SINICA
 |
| 出版日期 | 2017-06-01 |
| 卷号 | 53期号:6页码:760-768 |
| ISSN号 | 0412-1961 |
| 关键词 | phase-field method austenite ferrite Gibbs-energy dissipation incomplete transformation |
| DOI | 10.11900/0412.1961.2016.00468 |
| 通讯作者 | Zheng Chengwu(cwzheng@imr.ac.cn) |
| 英文摘要 | The effect of Mn on the austenite-to-ferrite transformation has been widely studied by both physical models and experiments due to its technological importance for alloy design in steel industries. In recent years, an increasing interest of this issue is moved onto the effect of alloying element on the migrating interface during the austenite-to-ferrite transformation. For ternary Fe-C-Mn alloys, the interfacial condition is more complicated than that of binary Fe-C alloys in view of the large difference in the diffusivity between the interstitial and substitutional alloying elements. Generally speaking, there are two main concepts, i.e. the paraequilibrium model and the local-equilibrium model, which have been proposed to describe the phase transformation kinetics in ternary Fe-C-Mn alloys based on different assumptions about the diffusion of the substitutional elements. And many modeling attempts have been made to study the effect of Mn on the migration kinetics by using these theories. In this work, a multi-phase-field (MPF) model coupling with a Gibbs-energy dissipation model was developed to simulate the isothermal austenite-to-ferrite transformation in ternary Fe-C-Mn alloys. This model has considered the Mn diffusion inside the migrating interface in a physical manner and takes its effect on the transformation kinetics into account. Comparison simulations were made to analyze the difference in the transformation kinetics and ferrite morphologies with and without considering the energy dissipation at the moving interface. It shows that the incomplete transformation phenomenon does occur due to the Mn diffusion inside interface. The modified MPF model was then used to study the effect of Mn contents on the microstructures and kinetics of the phase transformations. It is found that the ferrite growth along the austenite/austenite boundaries is faster than that in the perpendicular direction. This difference is intensified with increasing the Mn concentration, which hence leads to the ferrite morphology changed from elliptical to flat alike. It also produces a slower transformation kinetics and a larger degree of the incomplete transformation when increasing the Mn concentration. |
| WOS研究方向 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000405561500015 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/124716]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Zheng Chengwu |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Chem & Mat Sci, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang Jun,Chen Wenxiong,Zheng Chengwu,et al. Phase-Field Modeling of Austenite-to-Ferrite Transformation in Fe-C-Mn Ternary Alloys[J]. ACTA METALLURGICA SINICA,2017,53(6):760-768. |
| APA | Zhang Jun,Chen Wenxiong,Zheng Chengwu,&Li Dianzhong.(2017).Phase-Field Modeling of Austenite-to-Ferrite Transformation in Fe-C-Mn Ternary Alloys.ACTA METALLURGICA SINICA,53(6),760-768. |
| MLA | Zhang Jun,et al."Phase-Field Modeling of Austenite-to-Ferrite Transformation in Fe-C-Mn Ternary Alloys".ACTA METALLURGICA SINICA 53.6(2017):760-768. |
入库方式： OAI收割
来源：金属研究所
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