摘要
相场模拟目前已成为一种强有力的材料计算模拟工具,它可以模拟组织随时间的变化。本文用相场法模拟了Fe-Cr二元体系中相分离的组织演变过程。模拟结果表明,组织演变过程可以分为两个阶段。在开始阶段,形成富Cr和富Fe的相互连接结构,这种结构随模拟时间增长而粗化。第二阶段,富Cr和富Fe区完全分离,富Cr区长大。模拟结果与不锈钢热老化后的透射电镜有非常好的一致性。
Phase field simulations can catch temporal evolution of the microstructure and therefore become a powerful tool in materials design.Microstructure evolution of phase decompostion in Fe-Cr binary system were simulated by phase field method.Simulation results show that the microstructure evolution can be devided to two stages.In the early stage,interconnected strcuture coarsen with simulation time.In the late stage,Cr-enriched and Fe-rich region separated clearly,and the Cr-enriched region grow.The simulation results were well coincident with the experimental transmission electron microscopic（TEM） photograph.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2013年第5期965-969,共5页
Bulletin of the Chinese Ceramic Society
基金
National High-Tech Research and Development Program of China through grant(2012AA03A507,2012AA050901)
National Science and Technology Major Project of China through grant(2011ZX06004)
关键词
热老化
相分离
相场法
thermal aging
phase decomposition
phase field method
作者简介
Biography： LI Shu-xiao： （ 1982-）, female, Ph. D. Candidate, Mainly engaged in nuclear steel materials and integrity assessment of nuclear piping. E- mail：zangxue510515@ gmail. com
