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.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
通讯作者	Yang, J. B.(jbyang@imr.ac.cn) ; Zhang, Z. F.(zhfzhang@imr.ac.cn)
	2020-01-30
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	815 页码:9
摘要	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.
关键词	Molecular dynamics simulations Dislocations and disclinations Yield stress Elastic properties High-pressure Intermetallics
资助者	Program of One Hundred Talented People of the Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC)
DOI	10.1016/j.jallcom.2019.152362
收录类别	SCI
语种	英语
资助项目	Program 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研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000502521900060
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/136332
专题	中国科学院金属研究所
通讯作者	Yang, J. B.; Zhang, Z. F.
作者单位	1.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
推荐引用方式 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.