广西科学2016，Vol.23Issue(5)：459-464,6.DOI:10.13656/j.cnki.gxkx.20161121.002
晶界位错运动的空位晶体相场模拟
Vacancy Phase-field-crystal Simulation of Dislocation Motion of Grain Boundary
摘要
Abstract
Objective]The influence of different forms of stress on dislocation movement was studied.[Methods]By adding a vacancy free energy term,we obtained a new model of vacancy phase-field-crystal (VPFC),which was used to simulate the deformation process of low-angle grain boundaries(GBs)under a single direction stress.[Results]The simulation results show that the free energy of system increases when dislocations climb on GBs whereas the free ener-gy decreases when dislocations glide with the appearance of dislocations reaction.The tensile stress of x direction prompts dislocations to negative climbing,and compressive stress on the contrary.[Conclusion]The VPFC model can effectively simulate the microstructure evolution process of grain boundary dislocations and vacancies.关键词
晶体相场/位错/应变/晶界Key words
phase-field-crystal/dislocation/strain/grain boundary分类
矿业与冶金引用本文复制引用
黄世叶,李胜男,胡绪志,孔令一,卢强华,高英俊..晶界位错运动的空位晶体相场模拟[J].广西科学,2016,23(5):459-464,6.基金项目
国家自然科学基金项目(51161003,50661001),广西自然科学基金重点项目(2012GXNSFDA053001),广西大学大创项目(201610593220,201610593218)资助。 （51161003,50661001）
