相场法模拟第二相颗粒对柱状晶形成的影响

计算物理 ›› 2016, Vol. 33 ›› Issue (3): 367-373.

相场法模拟第二相颗粒对柱状晶形成的影响

罗志荣^1,2, 高英俊¹, 毛鸿¹, 卢成健², 黄世叶¹

1. 广西大学物理科学与工程技术学院, 南宁 530004;
2. 广西高校复杂系统优化与大数据处理重点实验室, 玉林师范学院物理科学与工程技术学院, 玉林 537000

收稿日期:2015-04-20 修回日期:2015-08-06 出版日期:2016-05-25 发布日期:2016-05-25
通讯作者: GAO Yingjun(1962-), male, Ph.D, professor, research in microscale materials modeling and materials design, E-mail:gaoyj@gxu.edu.cn
作者简介:LUO Zhirong(1981-), male, Ph.D, lecturer, research in microscale materials modeling and materials design, E-mail:robot-163@163.com
基金资助:
Supported by National Natural Science Foundation of China (51161003, 51561031), Natural Science Foundation of Guangxi Province of China (2015GXNSFBA139240), Scientific Research Foundation of Higher Education Institutions of Guangxi Province of China (YB2014318) and Open Foundation of Guangxi Colleges and Universities Key Laboratory of Complex System Optimization and Large Data Processing (2016CSOBDP0101)

Phase Field Modeling of Columnar Grain Growth:Effect of Second-Phase Particles

LUO Zhirong^1,2, GAO Yingjun¹, MAO Hong¹, LU Chengjian², HUANG Shiye¹

1. College of Physics Science and Engineering, Guangxi University, Nanning 530004, China;
2. Guangxi Colleges and Universities Key Laboratory of Complex System Optimization and Large Data Processing, College of Physics Science and Engineering, Yulin Normal University, Yulin 537000, China

Received:2015-04-20 Revised:2015-08-06 Online:2016-05-25 Published:2016-05-25
Supported by:
Supported by National Natural Science Foundation of China (51161003, 51561031), Natural Science Foundation of Guangxi Province of China (2015GXNSFBA139240), Scientific Research Foundation of Higher Education Institutions of Guangxi Province of China (YB2014318) and Open Foundation of Guangxi Colleges and Universities Key Laboratory of Complex System Optimization and Large Data Processing (2016CSOBDP0101)

摘要/Abstract

摘要： 基于定向退火条件下的移动热区模型,采用相场法研究第二相颗粒对多晶材料中柱状晶结构形成的影响.结果表明:第二相颗粒对柱状晶结构的形成具有抑制作用,其抑制作用随第二相颗粒体积分数的增加和第二相颗粒尺寸的减小而增强.定向退火条件下第二相颗粒对晶粒极限尺寸的影响遵循Zener关系.为了获得良好的柱状晶结构,应尽量减少材料中第二相颗粒的体积分数及其在晶界上的弥散分布.

关键词: 定向退火, 晶界迁移率, 柱状晶, 第二相颗粒, 相场法

Abstract: In a moving hot zone model with uniform temperature and an infinite temperature gradient under directional annealing, effect of second-phase particles (SPPs) on growth of columnar grain microstructure in polycrystalline materials was studied with phase field method. It shows that SPPs inhibit formation of columnar grain structure and inhibitory effect increases with increasing volume fraction of SPPs and decreasing size of SPPs. Effect of SPPs on final grain radius follows Zener relation under condition of directional annealing. Volume fraction of SPPs and their dispersive distribution at grain boundaries in materials should be reduced as far as possible to obtain better columnar grain structures during directional annealing.

Key words: directional annealing, grain boundary mobility, columnar grain, second-phase particles, phase field method

中图分类号:

TG111

罗志荣, 高英俊, 毛鸿, 卢成健, 黄世叶. 相场法模拟第二相颗粒对柱状晶形成的影响[J]. 计算物理, 2016, 33(3): 367-373.

LUO Zhirong, GAO Yingjun, MAO Hong, LU Chengjian, HUANG Shiye. Phase Field Modeling of Columnar Grain Growth:Effect of Second-Phase Particles[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2016, 33(3): 367-373.

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