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Acta Metall Sin  2010, Vol. 46 Issue (10): 1161-1172    DOI: 10.3724/SP.J.1037.2010.00272
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PHASE FIELD SIMULATION OF STATIC RECRYSTALLIZATION FOR AZ31 Mg ALLOY
GAO Yingjun 1,2,3, LUO Zhirong 1,2, HU Xiangying 1, HUANG Chuanggao 1
1. College of Physics Science and Engineering, Guangxi University, Nanning 530004
2. Key Laboratory of Disaster Prevention and Structural Safety, Guangxi University, Nanning 530004
3. International Center for Materials Physics, Chinese Academy of Science, Shenyang 110016
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Abstract  In order to obtain the deformation grain structure for static recrystallization, an initial grain structure are produced by lattice deformation model; aiming at characteristics of different deformation regions and non–uniform distribution of the stored energy in deformed alloy, a multistate free energy (MSFE) function are proposed by introducing a weight factor for the stored energy and a characteristics state factor for different deformed regions. Based on these, the microstructure evolutions of static recrystallization for deformed Mg alloys are simulated by phase field model. The transformation dynamic curve of recrystallization, Avrami curve, and the regularity for stored energy releaing and distribution of grain size in recrytallization process are systematically analyzed. The dynamic regularity of statc recrystallization obtained by simulating is in good accord with the JMAK theory, and the Avramcurve by simulating can be regard as a linear with average slopes 2.45, 2.35, 2.19 and 2.15, respectively. The Avrami time index decreases with the true strain increasing. The stored energy releases faster, and the lasting time of static recrystallization process is shorter when the true strain is greater. Based on the established MSFE model, the simulation results here are in good agreement with the other theoretical results and experimntal results.
Key words:  phase field model      static recrystallization      plastic deformation      microstructure      AZ31 Mg alloy     
Received:  08 June 2010     
ZTFLH: 

TG115

 
Fund: 

Supported by National Natural Science Foundation of China (Nos.50661001 and 50061001) and Natural Science Foundation of Guangxi Province (Nos.0991026, 0832029 and 0639004)

Corresponding Authors:  GAO Yingjun     E-mail:  gaoyj@gxu.edu.cn

Cite this article: 

GAO Yingjun LUO Zhirong HU Xiangying HUANG Chuanggao. PHASE FIELD SIMULATION OF STATIC RECRYSTALLIZATION FOR AZ31 Mg ALLOY. Acta Metall Sin, 2010, 46(10): 1161-1172.

URL: 

https://www.ams.org.cn/EN/10.3724/SP.J.1037.2010.00272     OR     https://www.ams.org.cn/EN/Y2010/V46/I10/1161

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