广西科学2016，Vol.23Issue(5)：470-473,484,5.DOI:10.13656/j.cnki.gxkx.20161121.016
拉应力作用下晶界位错运动过程的晶体相场模拟
Phase-field-crystal Simulation of Grain Boundary Dislo-cation Motion Under Tensile Stress
摘要
Abstract
Objective]The motion law of the grain boundary dislocation under the action of the tensile strain is analyzed.[Methods]The phase-field-crystal(PFC)method is used to study the dynamic evolution of the dislocation of the tensile stress,and the free energy of the evolution process is analyzed by using the continuous density field.[Results]When tensile stress is applied along the x axis,the dislocation movement trends to up at the left and down at the right.When tensile stress is applied along the y axis,the dislocation movement appears to down at the left and up at the right.Changing the direction of applied tensile stress affects remarkably on dislo-cation movement and free energy curve.Finally,all of the dislocation move to liquid phase and the simulation area becomes into a complete single crystal.[Conclusion]The tensile strain is ap-plied to cause the dislocation motion,the energy of the system is increased,and the dislocation motion is different under the action of different normal stress.With the interaction between the atoms and the external force field,the physical effect of the tensile strain can be seen.关键词
晶体相场/模拟实验/正应力/位错Key words
phase-field-crystal/simulation experi-ment/normal stress/dislocation分类
矿业与冶金引用本文复制引用
叶里,胡绪志,黄礼琳,卢强华,高英俊..拉应力作用下晶界位错运动过程的晶体相场模拟[J].广西科学,2016,23(5):470-473,484,5.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)和广西大学大创项目(201610593220,201610593218)资助。 （51161003,50661001）
