Core structures and planar faults associated with < 111 > screw superdislocations in B2 alloys)

doi:10.1016/j.intermet.2019.04.013

CORC > 金属研究所 > 中国科学院金属研究所

	Core structures and planar faults associated with < 111 > screw superdislocations in B2 alloys)
	Yan, J. X.1,2; Zhang, Z. J.1; Li, K. Q.1,2; Xia, Z. Y.1,2; Yang, J. B.1,2; Zhang, Z. F.1,2
刊名	INTERMETALLICS
	2019-07-01
卷号	110 页码:8
关键词	Molecular dynamics simulation Dislocation geometry and arrangement Planar faults Intermetallics Dislocation structure
ISSN号	0966-9795
DOI	10.1016/j.intermet.2019.04.013
通讯作者	Yang, J. B.(jbyang@imr.ac) ; Zhang, Z. F.(zhfzhang@imr.ac.cn)
英文摘要	The core structures, planar faults, and mobility associated with [111] screw superdislocations are systematically investigated by atomistic simulations using six different EAM potentials in FeAl. The results demonstrate that the core structures of [111] screw superdislocations transfer from two-fold into triple configurations, and the planar faults vary from metastable to unstable states in different FeAl alloys. The energy minimization (EM) approach is provided to quantitatively predict the core structures and planar faults of [111] superdislocations, where the Burgers vectors of partials and the state of planar faults are adjustable to optimize the system energy. Moreover, the consecutive transformation of core structures takes place before the activation of cross-slip under shear stresses at finite temperatures. In this case, the cross-slip mechanism dominated by core transformations is proposed, and it implies that the EM approach could be utilized to evaluate the cross-slip behaviors of super dislocations.
资助项目	Program of One Hundred Talented People of the Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC)[51571198] ; National Natural Science Foundation of China (NSFC)[51771206] ; National Natural Science Foundation of China (NSFC)[51331007]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000471355400001
资助机构	Program of One Hundred Talented People of the Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC)
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/133945]
专题	金属研究所_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, Mat Fatigue & Fracture Div, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Yan, J. X.,Zhang, Z. J.,Li, K. Q.,et al. Core structures and planar faults associated with < 111 > screw superdislocations in B2 alloys)[J]. INTERMETALLICS,2019,110:8.
APA	Yan, J. X.,Zhang, Z. J.,Li, K. Q.,Xia, Z. Y.,Yang, J. B.,&Zhang, Z. F..(2019).Core structures and planar faults associated with < 111 > screw superdislocations in B2 alloys).INTERMETALLICS,110,8.
MLA	Yan, J. X.,et al."Core structures and planar faults associated with < 111 > screw superdislocations in B2 alloys)".INTERMETALLICS 110(2019):8.