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Pressure effect on core structures and yield behaviors of < 111 > screw superdislocations in FeAl
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
Corresponding AuthorYang, J. B.(jbyang@imr.ac.cn) ; Zhang, Z. F.(zhfzhang@imr.ac.cn)
2020-01-30
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume815Pages:9
AbstractThe core structure and the mobility of [111] screw superdislocations are investigated under hydrostatic pressures by comprehensive atomic simulations in B2-FeAl. The pressure dependence of elastic constants and lattice parameter of FeAl is also revealed. The result indicates that the [111] screw super-dislocation dissociates on the (1 (1) over bar0) plane under different pressures, and the separation increases with the decrease of external pressures. It is interesting to find that the consecutive transformation of core configurations takes place under different pressures. The quantitative analysis confirms that the core transformation is determined by the system energy optimization. Furthermore, the simulation results demonstrate that the operation of < 111 > {112} and < 111 > {110} slip systems and the corresponding yield stresses of dissociated screw superdislocations have strong dependence on the variation of external pressures. (C) 2019 Elsevier B.V. All rights reserved.
KeywordMolecular dynamics simulations Dislocations and disclinations Yield stress Elastic properties High-pressure Intermetallics
Funding OrganizationProgram of One Hundred Talented People of the Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC)
DOI10.1016/j.jallcom.2019.152362
Indexed BySCI
Language英语
Funding ProjectProgram 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]
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000502521900060
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/136332
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, Lab Fatigue & Fracture Mat, Shenyang 110016, Liaoning, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
Recommended Citation
GB/T 7714
Yan, J. X.,Zhang, Z. J.,Li, K. Q.,et al. Pressure effect on core structures and yield behaviors of < 111 > screw superdislocations in FeAl[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,815:9.
APA Yan, J. X.,Zhang, Z. J.,Li, K. Q.,Xia, Z. Y.,Yang, J. B.,&Zhang, Z. F..(2020).Pressure effect on core structures and yield behaviors of < 111 > screw superdislocations in FeAl.JOURNAL OF ALLOYS AND COMPOUNDS,815,9.
MLA Yan, J. X.,et al."Pressure effect on core structures and yield behaviors of < 111 > screw superdislocations in FeAl".JOURNAL OF ALLOYS AND COMPOUNDS 815(2020):9.
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