物理学报2009，Vol.58Issue(z1)：343-348,6.
Ti-6Al-4V合金中片层组织形成的相场模拟
Phase field simulation on sideplates formation in Ti-6Al-4V alloy
摘要
Abstract
Ti-6Al-4V is a typical α+β titanium alloys. It presents the diversiform microstructures and thus various properties under different heat-treatment regimes and thermomechanical conditions. The thorough understanding of the formation mechanisms and the evolution rules of different microstructures is crucial to the optimization of the alloys. In this paper, the formation and the evolution of sideplates in Ti-6Al-4V alloy are simulated by using phase field method, with the thermodynamics and the mobility databases used as the input of the phase field model and the primary α phase assumed to exist at the grain boundary. The simulation results show that under a certain condition the grain boundary α phase can grow into β matrix and form sideplates, and that the morphology of α colony is related to the interfacial energy anisotropy. The grain boundary orientation has a strong effect on the sideplate structure. In addition, the heat-treatment temperature can also change the morphological features of sideplates. Higher temperature can slow down the growth of sideplates and result in wider sideplate spacing as well.关键词
Ti-6Al-4V/相场模拟/片层组织Key words
Ti-6Al-4V, phase field simulation, sideplate microstructure分类
化学化工引用本文复制引用
王刚,徐东生,杨锐..Ti-6Al-4V合金中片层组织形成的相场模拟[J].物理学报,2009,58(z1):343-348,6.基金项目
国家重点基础研究发展计划(批准号: 2006CB605104)资助的课题.Project supported by the State Key Development Program for Basic Research of China (Grant No. 2006CB605104). （批准号: 2006CB605104）
