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Pressure effect on core structures and yield behaviors of < 111 > screw superdislocations in FeAl
Yan, J. X.; Zhang, Z. J.; Li, K. Q.; Xia, Z. Y.; Yang, J. B.; Zhang, Z. F.
2020-01-30
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
Volume815
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.
DOI10.1016/j.jallcom.2019.152362
WOS IDWOS:000502521900060
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/83196
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. Pressure effect on core structures and yield behaviors of < 111 > screw superdislocations in FeAl[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,815.
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.
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).
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