Dependence of Dendritic Growth on Convention with PFM Simulation

摘要：

A binary alloy PFM (Phase-Field Model) which incorporates the flow field equations is constructed considering the dependence of microstructure on convention. Al-Cu binary alloy is investigated numerically based on the model, and the reasonable computational methods is studied for solving PFM, the effect of convention on dendritic growth and microsegregation patterns is implemented successfully. The computed results indicate that, the larger convention velocity U, the more developed the upstream dendritic branches is, and the more acutely the solute composition in the upstream dendritic solid fluctuates is. But the severity of microsegregation ahead of interface reduces. Nevertheless, the more undeveloped the downstream dendritic branches, the more acutely the solute composition in the the downstream dendritic solid fluctuates is, but the severity of microsegregation ahead of interface aggravates.

关键词： phase-field method convention denedritic growth numerical simulation

作者: Zhu Changsheng Gui Jin Wang Zhiping Feng Li

作者单位: CAD Center, Lanzhou University of Technology Lanzhou 730050, China State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials,Lanzhou University of Technology, State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology

会议类型: 国际会议

会议名称: 11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)

会议地点: 青岛

会议语种:英文

页码: 85-90

在线出版日期: 2010-09-25（万方平台首次上网日期，不代表论文的发表时间）