A NUMERICAL IMPLEMENTATION OF GRAIN BOUNDARY EFFECTS FOR DIRECTIONALLY SOLIDIFIED NICKEL-BASED ALLOY

摘要：

In this paper,we use different constitutive models to demonstrate the grain interior and grain boundary respectively to research the grain boundary effect of Nickel-based alloy.For the grain interior,a 3D continuum crystal plasticity model is used,which considers rate and temperature dependent.In order to investigate the effect of grain boundary,we consider the grain boundary as a physical layer,which is described by a visco-plasticity constitutive.In addition,we use a simple critical-strain-based criteria to model damage and failure of grain boundary due to cavitation.

关键词： Nickle-based alloy Crystal plasticity Grain boundary Damage FEM

作者: J.F.Nie X.C.You Z.Zhuang X.D.Li

作者单位: Dept.of Eng.Mechanics,School of Aerospace,Tsinghua University,Beijing,100084,China State Key Laboratory of Advanced Non-Ferrous Materials,Gansu University of Technology,Lanzhou,Gansu

会议类型: 国际会议

会议名称: 第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)

会议地点: 安徽黄山

会议语种:英文

页码: 1459-1462

在线出版日期: 2008-06-03（万方平台首次上网日期，不代表论文的发表时间）