非对称倾侧亚晶界的晶体相场法研究

鲁娜; 王永欣; 陈铮

doi:10.7498/aps.63.180508

摘要

采用晶体相场法研究非对称倾侧亚晶界结构及其在应力作用下的微观运动机制. 分别从温度、倾斜度角以及应力施加方向等方面对其结构及迁移过程进行分析和讨论. 结果表明，非对称倾侧亚晶界由符号相同的一排刃型位错等距排列，部分出现由两个相互垂直排列的刃型位错构成的位错组；在应力作用下，非对称倾侧亚晶界迁移的微观机制包括位错的滑移和攀移、位错组分解、单个位错与位错组反应、单个位错分解以及位错湮灭；温度降低和倾斜度增大都会阻碍亚晶界的迁移过程；应力方向改变导致位错运动方向改变，从而改变晶界迁移形式.

关键词:

Abstract

With the phase field crystal approach, the structure of asymmetrical tilt subgrain boundaries and their motion micmechanism under stress are studied. The effects of temperature, inclination angle and stress direction on structure and migration process are also analyzed and discussed. Simulated results show that the subgrain boundary is composed of a row of edge dislcations with the same bugers vectors and the double-array dislocations with a vertical distribution. The motion process of asymmetrical tilt subgrain boundaries contains dislocation glide and climb, dislocation separation, dislocation reaction, individual dislocation decomposition and dislocation annihilation. The decrease of temperature and the increase of inclination angle hinder the subgrain boundary migration process. The change of stress direction causes the variation of dislocation motion and thus lead to the change in migration manner of subgrain boundary.

Keywords:

作者及机构信息

1.
西北工业大学, 凝固技术国家重点实验室, 西安 710072

基金项目: 国家自然科学基金（批准号：51274167，51174168）和陕西省自然科学基金（批准号：2014JM7261）资助的课题.

Authors and contacts

1.
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China

Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 51274167, 51174168), and the Shaanxi Provincial Natural Science Foundation, China (Grant No. 2014JM7261).

参考文献

[1]	Raimbourg H, Kogure T, Toyoshima T 2011 Contrib. Mineral Petrol. 162 1093
[2]	Sedlácek R, Blum W, Kratochvil J, Forest S 2002 Metal. Mater. 33 319
[3]	Molodov D A, Gorkaya T, Gottstein G 2011 Instit. Phys. Metal. Metal Phys. 46 4318
[4]	Xie H X, Liu B, Yin F X, Yu T 2013 Chin. Phys. B 22 010204
[5]	He S Z, Hou G, Su C F, Wu C X 2013 Chin. Phys. B 22 016101
[6]	Wang C Y, Meng Q Y, Wang Y T 2009 Acta Metall. Sin. 45 400(in Chinese)[王超营, 孟庆元, 王云涛 2009 金属学报 45 400]
[7]	Elder K R, Katakowski M, Grant M 2002 Phys. Rev. Lett. 88 245701
[8]	Elder K R, Grant M 2004 Phys. Rev. E 70 051605
[9]	Ren X, Wang J C, Yang Y J, Yang G C 2010 Acta Phys. Sin. 59 3595(in Chinese)[任秀, 王锦程, 杨玉娟, 杨根仓 2010 物理学报 59 3595]
[10]	Zhang Q, Wang J C, Zhang Y C, Yang G C 2011 Acta Phys. Sin. 60 088104(in Chinese)[张琪, 王锦程, 张亚从, 杨根仓 2011 物理学报 60 088104]
[11]	Yang T, Chen Z, Zhang J, Dong W P, Wu L 2012 Chin. Phys. Lett. 29 078103
[12]	Huang Z F, Elder K R 2008 Phys. Rev. Lett. 101 158701
[13]	Yang T, Chen Z, Dong W P 2011 Acta Metal. Sin. 47 1301(in Chinese)[杨涛, 陈铮, 董卫平 2011 金属学报 47 1301]
[14]	Wu K A, Voorhees P W 2009 Phys. Rev. B 80 125408
[15]	Wu K A, Adland A, Karma A 2010 Phys. Rev. E 81 061601
[16]	Hirouchi T, Takaki T, Tomita Y 2009 Comput. Mater. Sci. 44 1192

施引文献

[1]	Raimbourg H, Kogure T, Toyoshima T 2011 Contrib. Mineral Petrol. 162 1093
[2]	Sedlácek R, Blum W, Kratochvil J, Forest S 2002 Metal. Mater. 33 319
[3]	Molodov D A, Gorkaya T, Gottstein G 2011 Instit. Phys. Metal. Metal Phys. 46 4318
[4]	Xie H X, Liu B, Yin F X, Yu T 2013 Chin. Phys. B 22 010204
[5]	He S Z, Hou G, Su C F, Wu C X 2013 Chin. Phys. B 22 016101
[6]	Wang C Y, Meng Q Y, Wang Y T 2009 Acta Metall. Sin. 45 400(in Chinese)[王超营, 孟庆元, 王云涛 2009 金属学报 45 400]
[7]	Elder K R, Katakowski M, Grant M 2002 Phys. Rev. Lett. 88 245701
[8]	Elder K R, Grant M 2004 Phys. Rev. E 70 051605
[9]	Ren X, Wang J C, Yang Y J, Yang G C 2010 Acta Phys. Sin. 59 3595(in Chinese)[任秀, 王锦程, 杨玉娟, 杨根仓 2010 物理学报 59 3595]
[10]	Zhang Q, Wang J C, Zhang Y C, Yang G C 2011 Acta Phys. Sin. 60 088104(in Chinese)[张琪, 王锦程, 张亚从, 杨根仓 2011 物理学报 60 088104]
[11]	Yang T, Chen Z, Zhang J, Dong W P, Wu L 2012 Chin. Phys. Lett. 29 078103
[12]	Huang Z F, Elder K R 2008 Phys. Rev. Lett. 101 158701
[13]	Yang T, Chen Z, Dong W P 2011 Acta Metal. Sin. 47 1301(in Chinese)[杨涛, 陈铮, 董卫平 2011 金属学报 47 1301]
[14]	Wu K A, Voorhees P W 2009 Phys. Rev. B 80 125408
[15]	Wu K A, Adland A, Karma A 2010 Phys. Rev. E 81 061601
[16]	Hirouchi T, Takaki T, Tomita Y 2009 Comput. Mater. Sci. 44 1192

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