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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
Corresponding AuthorYang, J. B.(jbyang@imr.ac.cn) ; Zhang, Z. F.(zhfzhang@imr.ac.cn)
2021-03-01
Source PublicationCOMPUTATIONAL MATERIALS SCIENCE
ISSN0927-0256
Volume189Pages:10
AbstractThe 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.
KeywordMolecular dynamics simulations Dislocations and disclinations Cross-slip High-pressure Intermetallics
Funding OrganizationNational Natural Science Foundation of China (NSFC)
DOI10.1016/j.commatsci.2020.110261
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China (NSFC)[51571198] ; National Natural Science Foundation of China (NSFC)[51771206]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000618925400001
PublisherELSEVIER
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/161314
Collection中国科学院金属研究所
Corresponding AuthorYang, J. B.; Zhang, Z. F.
Affiliation1.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
Recommended Citation
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.
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