Pressure effect on core structures and yield behaviors of < 111 > screw superdislocations in FeAl

doi:10.1016/j.jallcom.2019.152362

IMR OpenIR

	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 Publication	JOURNAL OF ALLOYS AND COMPOUNDS
Volume	815
Abstract	The 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.
DOI	10.1016/j.jallcom.2019.152362
WOS ID	WOS:000502521900060
Citation statistics
Document Type	期刊论文
Identifier	http://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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