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

文献类型：期刊论文

作者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
出版日期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
DOI10.1016/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
WOS记录号WOS:000471355400001
出版者ELSEVIER SCI LTD
资助机构Program of One Hundred Talented People of the Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC)
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.

入库方式： OAI收割

来源：金属研究所

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