Insensitivity of Grain boundary Stress Fields to Area Variations

doi:10.1002/pssb.202400184

IMR OpenIR

	Insensitivity of Grain boundary Stress Fields to Area Variations
	Yang, Jinbo 1,2; Chen, Yaling 1,2; Guo, Yu 1,2; Meng, Lingxiao 1,2; Yan, Jingxin 3; Yang, Huajie 4; Zhang, Zhefeng 1,2
通讯作者	Yang, Jinbo(jbyang@imr.ac.cn)
	2024-06-22
发表期刊	PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
ISSN	0370-1972
页码	12
摘要	The atomistic simulations in this article substantiate that grain boundary stress fields remain unaffected by changes in their area, aligning with the Olson-Cohen theory which supports that such area insensitivity is an inherent outcome of the combined effect of coherency and anti-coherency dislocations. Twist grain boundaries are employed in alpha-iron as a model in atomistic simulations, revealing and contrasting the dislocations and stresses of these grain boundaries when their area varies from infinity to a few square nanometers. It is discovered that the grain boundary stresses remain relatively constant, always short-ranged. Furthermore, within the framework of the Frank-Bilby equation, the line directions and spacing of coherency and anti-coherency dislocation arrays in a grain boundary are predicted, the stresses of these dislocations are subsequently calculated numerically, and these stresses are superimposed together to form the grain boundary stress field. The numerical calculations verify that stress fields of grain boundaries are not sensitive to changes of their area, corroborating our atomistic simulations. The preliminary atomistic simulations of various homophase and heterophase boundaries further affirm this area insensitivity. Atomistic simulations and numerical calculations demonstrate that the area insensitivity of grain boundary stress fields can be attributed to the net boundary dislocation content of zero and that all real grain boundaries with finite areas have short-range stress fields and finite boundary energy.image (c) 2024 WILEY-VCH GmbH
关键词	area size effect dislocation structures grain boundary molecular dynamics nanometer grain
资助者	National Natural Science Foundation of China ; National Natural Science Foundation of China (NSFC) ; KC Wong Education Foundation
DOI	10.1002/pssb.202400184
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51771206] ; National Natural Science Foundation of China[52071316] ; National Natural Science Foundation of China (NSFC)[GJTD-2020-09] ; KC Wong Education Foundation
WOS研究方向	Physics
WOS类目	Physics, Condensed Matter
WOS记录号	WOS:001251597400001
出版者	WILEY-V C H VERLAG GMBH
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/187277
专题	中国科学院金属研究所
通讯作者	Yang, Jinbo
作者单位	1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Chongqing Jiaotong Univ, Sch Mat Sci & Engn, Chongqing 400074, Peoples R China 4.SuZhou Lab, Suzhou 215028, Peoples R China
推荐引用方式 GB/T 7714	Yang, Jinbo,Chen, Yaling,Guo, Yu,et al. Insensitivity of Grain boundary Stress Fields to Area Variations[J]. PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS,2024:12.
APA	Yang, Jinbo.,Chen, Yaling.,Guo, Yu.,Meng, Lingxiao.,Yan, Jingxin.,...&Zhang, Zhefeng.(2024).Insensitivity of Grain boundary Stress Fields to Area Variations.PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS,12.
MLA	Yang, Jinbo,et al."Insensitivity of Grain boundary Stress Fields to Area Variations".PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS (2024):12.