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

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	Core structures and planar faults associated with < 111 > screw superdislocations in B2 alloys)
	Yan, J. X.; Zhang, Z. J.; Li, K. Q.; Xia, Z. Y.; Yang, J. B.; Zhang, Z. F.
	2019-07-01
Source Publication	INTERMETALLICS
ISSN	0966-9795
Volume	110
Abstract	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.
Keyword	Molecular dynamics simulation Dislocation geometry and arrangement Planar faults Intermetallics Dislocation structure
Indexed By	SCI
Language	英语
WOS ID	WOS:000471355400001
Publisher	ELSEVIER SCI LTD
Citation statistics
Document Type	期刊论文
Identifier	http://ir.imr.ac.cn/handle/321006/80947
Collection	中国科学院金属研究所
Recommended Citation 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.
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.
MLA	Yan, J. X.,et al."Core structures and planar faults associated with < 111 > screw superdislocations in B2 alloys)".INTERMETALLICS 110(2019).

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