Cross-slip mechanisms of < 111 > screw superdislocations in FeAl

doi:10.1016/j.commatsci.2020.110261

IMR OpenIR

	Cross-slip mechanisms of < 111 > screw superdislocations in FeAl
	Yan, J. X.1,2; Zhang, Z. J.1; Li, K. Q.1,2; Yang, J. B.1,2; Zhang, Z. F.1,2
通讯作者	Yang, J. B.(jbyang@imr.ac.cn) ; Zhang, Z. F.(zhfzhang@imr.ac.cn)
	2021-03-01
发表期刊	COMPUTATIONAL MATERIALS SCIENCE
ISSN	0927-0256
卷号	189 页码:10
摘要	The evolution of the core structure and the cross-slip behavior of a screw [111] superdislocation are investigated by molecular dynamics simulations at external pressures and shear stresses in FeAl with the B2 structure. The result reveals that the transformation between different core configurations generally determines the cross-slip behavior of a dissociated superdislocation after the application of pressures and shear stresses. In terms of the core transformation, two novel cross-slip mechanisms are provided for a dissociated superdislocation. Furthermore, a numerical calculation method is proposed to quantitatively assess the critical shear stress of the core transformation and cross-slip at distinct pressures, the result of which shows a great agreement with the simulation results. In addition, the influence of applied stresses on the competition between the glide and cross-slip behaviors of a dissociated superdislocation is discussed. It shows that the numerical calculation can advance the understanding for the dependence of the core configuration and the motion of dissociated superdislocations on applied pressures and shear stresses.
关键词	Molecular dynamics simulations Dislocations and disclinations Cross-slip High-pressure Intermetallics
资助者	National Natural Science Foundation of China (NSFC)
DOI	10.1016/j.commatsci.2020.110261
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China (NSFC)[51571198] ; National Natural Science Foundation of China (NSFC)[51771206]
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:000618925400001
出版者	ELSEVIER
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/161314
专题	中国科学院金属研究所
通讯作者	Yang, J. B.; Zhang, Z. F.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Yan, J. X.,Zhang, Z. J.,Li, K. Q.,et al. Cross-slip mechanisms of < 111 > screw superdislocations in FeAl[J]. COMPUTATIONAL MATERIALS SCIENCE,2021,189:10.
APA	Yan, J. X.,Zhang, Z. J.,Li, K. Q.,Yang, J. B.,&Zhang, Z. F..(2021).Cross-slip mechanisms of < 111 > screw superdislocations in FeAl.COMPUTATIONAL MATERIALS SCIENCE,189,10.
MLA	Yan, J. X.,et al."Cross-slip mechanisms of < 111 > screw superdislocations in FeAl".COMPUTATIONAL MATERIALS SCIENCE 189(2021):10.