The simulation of stress-induced phase transition of L10 re-precipitation based on microscopic phase-field model

摘要：

It is common that the pre-precipitation phase with kinetics advantage is found during non-equilibrium transformation. The continuously changed stress in the transformation increases the complication of precipitation process. The stress induces Ll0 pre-precipitation phase in Ni75-Al12.5-V12.5 alloy is studied by microscope phase-field model in this paper. It is particularly show that Ll2 phase precipitates directly without stress. There is no Ll0 phase to be found in the disordered matrix. Oppositely, Ll0 phase precipitates firstly with stress, and then it turns into Ll2 phase. When stress is less, either or both above situations are observed. While stress is stronger, a large range of Ll0 phase precipitates firstly. Then a part of it dissolves. The rest turns into Ll2 phase. The precipitation of pre-precipitation phase accelerates the precipitation process. The larger the stress and the more Ll0 phase precipitation, the longer it exists and the shorter the induction period is.

关键词： Microscope phase-field model Stress induced Ll0 pre-precipitation phase Ni-Al-V alloy

作者: Wang Yongxin Wang Yongbiao Chen Zheng Lu Yanli

作者单位: State Key Laboratory of Solidification Processing, Northwestern Polytechnical University,Xi’an, 7100 State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, 710

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: 226-234

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）