金属学报  2011, Vol. 47 Issue (10): 1301-1306    DOI: 10.3724/SP.J.1037.2011.00111

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应力诱发双位错组亚晶界湮没的晶体相场模拟

杨涛,陈铮,董卫平

西北工业大学凝固技术国家重点实验室, 西安 710072

PHASE FIELD CRYSTAL SIMULATION OF STRESS–INDUCED ANNIHILATION OF SUB–GRAIN BOUNDARY WITH DOUBLE–ARRAY DISLOCATION

YANG Tao, CHEN Zheng, DONG Weiping

State Key Laboratory of Solidification Processing, Northwestern Ploytechnical University, Xi’an 710072

杨涛 陈铮 董卫平. 应力诱发双位错组亚晶界湮没的晶体相场模拟[J]. 金属学报, 2011, 47(10): 1301-1306.
, , . PHASE FIELD CRYSTAL SIMULATION OF STRESS–INDUCED ANNIHILATION OF SUB–GRAIN BOUNDARY WITH DOUBLE–ARRAY DISLOCATION[J]. Acta Metall Sin, 2011, 47(10): 1301-1306.

摘要 参考文献 相关文章 Metrics 全文: PDF(1190 KB)   摘要: 采用晶体相场模型模拟了对称倾侧亚晶界结构及其在应力作用下的湮没机制,并从位错运动和能量角度对湮没机制进行分析, 此外还分别讨论了温度、位向差和应力方向对亚晶界湮没的影响. 研究表明, 亚晶界是由呈一定角度的双位错组垂直分布组成的; 亚晶界的湮没过程包括4个阶段:位错的攀移, 位错的分离与攀滑移, 位错的再次攀移和再次分离、攀滑移;温度的降低阻碍亚晶界的湮没; 位向差小的亚晶界先于位向差大的亚晶界湮没,且湮没速度较快;亚晶界上应力方向的改变会引起湮没过程中位错运动方向发生改变,从而影响亚晶界的湮没, 压应力有利于亚晶界的湮没. 关键词 ： 晶体相场模型,  亚晶界,  双位错组,  应力诱发淹没     Abstract：The structure of symmetric tilt sub–grain boundary (SGB) and its annihilation mechanism under stress were modeled with the phase field crystal approach, including the analysis from two aspects of dislocation movement and system energy. In addition, the effects of temperature, misorientation and stress direction on SGB annihilation were also discussed. Simulated results show that the SGB is composed of double–array dislocations with a vertical distribution. The annihilation process generally contains four stages: dislocation climb, dislocation separation, another dislocation climb and separation again. The reduction of temperature hinders the process of annihilation. The SGB with a small misorientation annihilates earlier and faster than the one with a large misorientation. The annihilation differs under different stress conditions, and the compressive stress is favorable to the annihilation. Key words： phase field crystal model    sub–grain boundary    double–array dislocation    stress–induced annihilation 收稿日期: 2011-03-04      ZTFLH:  TG111.2   基金资助: 国家自然科学基金项目51075335, 10902086和50875217, 西北工业大学基础研究基金项目NPU-FFR-JC201005以及西北工业大学博士论文创新基金项目CX201103资助 作者简介: 杨涛, 男, 1988年生, 博士生 服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 杨涛 陈铮 董卫平 44.8K 链接本文: https://www.ams.org.cn/CN/10.3724/SP.J.1037.2011.00111      或      https://www.ams.org.cn/CN/Y2011/V47/I10/1301 [1] Varma S K, Willits B L. Metall Trans, 1984; 15A: 1502 [2] Lin Y X. Rare Met Mater Eng, 1992; 21: 30 (林永新. 稀有金属材料与工程, 1992; 21: 30) [3] Hayakawa M, Yamaguchi K, Kimura M. Mater Lett, 2004; 58: 2565 [4] Zhou L, Wei X Q, Zhou N G. Acta Metall Sin(Engl Lett), 2004; 17: 11 [5] Bobylev S V, Gutkin M Y, Ovid’ko I A. Acta Mater, 2004; 52: 3793 [6] Bobylev S V, Gutkin M Y, Ovid’ko I A. Appl Phys, 2004; 37D: 269 [7] Caturla M J, Nieh T G, Stolken J S. Appl Phys Lett, 2004; 84: 598 [8] Stefanovic P, Haataja M, Proatas N. Phys Rev, 2009; 80E: 046107 [9] Liu X M, You X C, Liu Z L, Zhuang Z. Acta Metall Sin, 2008; 44: 1025 (刘小明, 由小川, 柳占立, 庄茁. 金属学报, 2008; 44: 1025) [10] Wang C Y, Meng Q Y, Wang Y T. Acta Metall Sin, 2009; 45: 400 (王超营, 孟庆元, 王云涛. 金属学报, 2009; 45: 400) [11] Elder K R, Katakowski M, Haataja M, Grant M . Phys Rev Lett, 2002; 88: 245701 [12] Elder K R, Grant M. Phys Rev, 2004; 70E: 051605 [13] Chen L Q, Shen J. Comput Phys Commun, 1998; 108: 147 [14] Ren X, Wang J C, Yang Y J, Yang G C. Acta Phys Sin, 2010; 59: 3595 (任秀, 王锦程, 杨玉娟, 杨根仓. 物理学报, 2010; 59: 3595) [15] Hirouchi T, Takaki T, Tomita Y. Comput Mater Sci, 2009; 44: 1192 [1] 钟茜婷, 王磊, 刘峰. Incoloy 028合金不连续动态再结晶中链状组织形成机理研究[J]. 金属学报, 2018, 54(7): 969-980. [2] 高英俊, 卢昱江, 孔令一, 邓芊芊, 黄礼琳, 罗志荣. 晶体相场模型及其在材料微结构演化中的应用[J]. 金属学报, 2018, 54(2): 278-292. [3] 卢艳丽,卢广明,胡婷婷,杨涛,陈铮. 晶体相场法研究Kirkendall效应诱发的相界空洞的形成和演变*[J]. 金属学报, 2015, 51(7): 866-872. [4] 高英俊, 周文权, 邓芊芊, 罗志荣, 林葵, 黄创高. 晶体相场方法模拟高温应变作用的预熔化晶界的位错运动*[J]. 金属学报, 2014, 50(7): 886-896. [5] 高英俊, 卢成健, 黄礼琳, 罗志荣, 黄创高. 晶界位错运动与位错反应过程的晶体相场模拟*[J]. 金属学报, 2014, 50(1): 110-120. [6] 张俊善;曹智本. Ni-20Cr合金高温蠕变行为与位错亚结构的关系[J]. 金属学报, 1988, 24(2): 111-118. Viewed Full text Abstract Cited   Shared      Discussed