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

CHINESE JOURNAL OF COMPUTATIONAL PHYSICS ›› 2016, Vol. 33 ›› Issue (3): 367-373.

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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)

Abstract

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

CLC Number:

TG111

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

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