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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 PublicationINTERMETALLICS
ISSN0966-9795
Volume110
AbstractThe 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.
KeywordMolecular dynamics simulation Dislocation geometry and arrangement Planar faults Intermetallics Dislocation structure
Indexed BySCI
Language英语
WOS IDWOS:000471355400001
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://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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