多晶合金凝固过程中柱状晶-等轴晶竞争的相场方法模拟研究（英文）
详细信息 查看官网全文
- 英文论文题名：Phase Field Modeling and Simulation of Columnar-equiaxed Competition During Solidification in Polycrystalline Alloys
- 论文作者：杜立飞 ; 张鹏 ; 陈杰 ; 杜慧玲
- 英文论文作者：DU Lifei ; ZHANG Peng ; CHEN Jie ; DU Huiling ; College of Materials Science and Engineering ; Xi'an University of Science and Technology
- 年：2016
- 作者机构：西安科技大学材料科学与工程学院;
- 论文关键词：相场方法 ; 多晶 ; 各向异性 ; 柱状晶-等轴晶竞争
- 英文论文关键词：phase-field method ; polycrystalline ; anisotropy ; columnar-equiaxed competition
- 会议召开时间：2016-11-18
- 会议录名称：第一届先进材料前沿学术会议论文集（《材料导报》2016年第30卷第Z1期）
- 语种：英文
- 分类号：TG111.4
- 学会代码：CLDB
- 会议名称：第一届先进材料前沿学术会议
- 会议地点：中国陕西西安
- 主办单位：《材料导报》杂志社
- 学会名称：材料导报编辑部
- 页数：6
- 文件大小：1433k
- 原文格式：O
- 会议级别：全国
摘要
提出了一种耦合了界面各向异性的多晶多相场模型来研究多晶材料中的晶体生长过程,模型中引入了过冷度控制的随机形核过程来研究等温及非等温条件下二元合金的多晶生长过程。利用该模型研究了定向凝固条件下的柱状晶-等轴晶竞争过程,主要讨论了温度梯度及随机形核过程对柱状晶-等轴晶竞争关系的影响。模拟结果表明:成分过冷对柱状晶-等轴晶竞争关系的影响远大于温度过冷的影响;随机形核形成的等轴晶阻碍柱状晶的生长过程,决定最终的凝固组织形态;初始温度梯度对柱状晶-等轴晶竞争关系也存在一定的影响。
A multi-phase,multi-order parameter model for grain growth coupling with the heat conduction equation was proposed to study polycrystalline solidification,and the effect of anisotropy in interfacial energy was considered in this model Random nucleation process driven by heat cooling was introduced in the system to simulate polycrystalline solidification in a model binary alloy both in isothermal and non-isothermal conditions.Simulations of directional solidification were performed to study the competition between columnar and equiaxed solidification.Effect of temperature gradient and nucleation process on columnar-equiaxed competition was studied and discussed.Results indicated that constitutional undercooling was far more important than thermal undercooling in columnar to equiaxed transition,and nucleation of solid seed composed the formation of equiaxed grains,which could block the growth of columnar grains,thus determined the extent of formation of columnar grains and equiaxed grains.Also,the initial temperature gradient could also affect the competition of columnar and equiaxed growth.
A multi-phase,multi-order parameter model for grain growth coupling with the heat conduction equation was proposed to study polycrystalline solidification,and the effect of anisotropy in interfacial energy was considered in this model Random nucleation process driven by heat cooling was introduced in the system to simulate polycrystalline solidification in a model binary alloy both in isothermal and non-isothermal conditions.Simulations of directional solidification were performed to study the competition between columnar and equiaxed solidification.Effect of temperature gradient and nucleation process on columnar-equiaxed competition was studied and discussed.Results indicated that constitutional undercooling was far more important than thermal undercooling in columnar to equiaxed transition,and nucleation of solid seed composed the formation of equiaxed grains,which could block the growth of columnar grains,thus determined the extent of formation of columnar grains and equiaxed grains.Also,the initial temperature gradient could also affect the competition of columnar and equiaxed growth.
引文
1 Flood S C,Hunt J D.Columnar and equiaxed growth.1.A model of a columnar front with a temperature-dependent velocity[J].J Cryst Growth,1987,82:543.
2 Flood S C,Hunt J D.Columnar and equiaxed growth.2.Equiaxed growth ahead of a columnar front[J].J Cryst Growth,1987,82:552.
3 Gaumann M,Bezencon C,Canalis P,et al.Single-crystal laser deposition of superalloys;Processing-microstructure maps[J].Acta Mater,2001,49:1051.
4 Rappaz M,Gandin C A.Probabilistic modeling of microstructure formation in solidification processes[J].Acta Metall Mater,1993,41:345.
5 Warren J A,Kobayashi R,Lobovsky A E,et al.Extending phase field models of solidification to polycrystalline materials[J].Acta Mater,2003,51:6035.
6 Kazaryan A,Wang Y,Dregia S A,et al.Generalized phase-field model for computer simulation of grain growth in anisotropic systems[J].Phys Rev B.2000,61:14275.
7 Nguyen-Thi H,Reinhart G,Mangelinck-Noel N,et al.In-situ and real-time investigation of columnar-to-equiaxed transition in metallic alloy[J].Metall Mater Trans A,2007,38:1458.
8 Moelans N,Blanpain B,Wollants P.Quantitative phase-field approach for simulating grain growth in anisotropic systems with arbitrary inclination and misorientation dependence[J].Phys Rev Lett,2008,101:025502.
9 Moelans N,Blanpain B,Wollants P.Quantitative analysis of grain boundary properties in a generalized phase field model for grain growth in anisotropic systems[J].Phys Rev B,2008,78:024113.
10 Badillo A,Beckermann C.Phase-field simulation of the columnar-toequiaxed transition in alloy solidification[J].Acta Mater,2006,54:2015.
11 Li J,Wang J,Yang G.Phase-field simulatizon of microstructure development involving nucleation and crystallographic orientations in alloy solidification[J].J Cryst Growth,2007,309:65.
12 Li J,Wang J,Xu Q,et al.Comparison of johnson-mehl-avrami-kologoromov(JMAK)kinetics with a phase field simulation for polycrystalline solidification[J].Acta Mater,2007,55:825.
13 Fan D,et al.Phase field formulations for mode-ling the ostwald ripening in two-phase systems[J].Comp Mater Sci,1998,9:329.
14 Fan D,Chen S,Chen L Q,et al.Phase-field simulation of 2-D Ostwald ripening in the high volume fraction regime[J].Acta Mater,2002,50:1895.
15 Kobayashi R.Modeling and numerical simulations of dendritic crystal-growth[J].Physica D,1993,63:410.
2 Flood S C,Hunt J D.Columnar and equiaxed growth.2.Equiaxed growth ahead of a columnar front[J].J Cryst Growth,1987,82:552.
3 Gaumann M,Bezencon C,Canalis P,et al.Single-crystal laser deposition of superalloys;Processing-microstructure maps[J].Acta Mater,2001,49:1051.
4 Rappaz M,Gandin C A.Probabilistic modeling of microstructure formation in solidification processes[J].Acta Metall Mater,1993,41:345.
5 Warren J A,Kobayashi R,Lobovsky A E,et al.Extending phase field models of solidification to polycrystalline materials[J].Acta Mater,2003,51:6035.
6 Kazaryan A,Wang Y,Dregia S A,et al.Generalized phase-field model for computer simulation of grain growth in anisotropic systems[J].Phys Rev B.2000,61:14275.
7 Nguyen-Thi H,Reinhart G,Mangelinck-Noel N,et al.In-situ and real-time investigation of columnar-to-equiaxed transition in metallic alloy[J].Metall Mater Trans A,2007,38:1458.
8 Moelans N,Blanpain B,Wollants P.Quantitative phase-field approach for simulating grain growth in anisotropic systems with arbitrary inclination and misorientation dependence[J].Phys Rev Lett,2008,101:025502.
9 Moelans N,Blanpain B,Wollants P.Quantitative analysis of grain boundary properties in a generalized phase field model for grain growth in anisotropic systems[J].Phys Rev B,2008,78:024113.
10 Badillo A,Beckermann C.Phase-field simulation of the columnar-toequiaxed transition in alloy solidification[J].Acta Mater,2006,54:2015.
11 Li J,Wang J,Yang G.Phase-field simulatizon of microstructure development involving nucleation and crystallographic orientations in alloy solidification[J].J Cryst Growth,2007,309:65.
12 Li J,Wang J,Xu Q,et al.Comparison of johnson-mehl-avrami-kologoromov(JMAK)kinetics with a phase field simulation for polycrystalline solidification[J].Acta Mater,2007,55:825.
13 Fan D,et al.Phase field formulations for mode-ling the ostwald ripening in two-phase systems[J].Comp Mater Sci,1998,9:329.
14 Fan D,Chen S,Chen L Q,et al.Phase-field simulation of 2-D Ostwald ripening in the high volume fraction regime[J].Acta Mater,2002,50:1895.
15 Kobayashi R.Modeling and numerical simulations of dendritic crystal-growth[J].Physica D,1993,63:410.