Interactions between hydrogen bubbles and prismatic interstitial dislocation loops in BCC iron

doi:10.1016/j.commatsci.2020.109724

	Interactions between hydrogen bubbles and prismatic interstitial dislocation loops in BCC iron
	Wei, Yaxia 5,6; Gao, Ning 1,3,4,5,6; Shen, Zhenyu 2; Chen, Cheng 5,6; Xie, Ziyang 5,6; Guo, Liping 5
刊名	COMPUTATIONAL MATERIALS SCIENCE
	2020-07-01
卷号	180 页码:8
关键词	Pinning mechanism Hydrogen bubble Dislocation loop Molecular dynamics (MD)
ISSN号	0927-0256
DOI	10.1016/j.commatsci.2020.109724
通讯作者	Gao, Ning(ning.gao@sdu.edu.cn) ; Guo, Liping(guolp@whu.edu.cn)
英文摘要	The interaction between the interstitial dislocation loop and the hydrogen bubble has been investigated using the molecular dynamics (MD) method, to understand the behavior of dislocation loops in iron-based alloys for the future nuclear systems in which high concentration of hydrogen is created in structural materials. Based on the simulation results, the pinning effect of hydrogen bubble on prismatic interstitial dislocation loop is proposed in bcc iron. The dislocation loop can be attracted to a hydrogen bubble and locked by it when the dislocation loop is in contacts with the bubble. The dislocation loop gliding is also impeded through the elastic interaction with a hydrogen bubble, but without directly colliding with it. When the attractive interaction between a hydrogen bubble and an interstitial dislocation loop is strong enough, the hydrogen bubble can capture the dislocation loop directly and they annihilate with each other. The switching of these interaction mechanisms depends on sizes of the dislocation loop and the hydrogen bubble, the anglen and the distance between the loop and the bubble, and the surface density of hydrogen atoms in the bubble. All these results provide new insight on hydrogen effect in irradiated iron-based materials.
资助项目	National Natural Science Foundation of China[11675230] ; National Natural Science Foundation of China[11775162] ; National Natural Science Foundation of China[11975170]
WOS关键词	ATOM CLUSTERS ; HELIUM ; ENERGY ; METALS ; MOBILITY ; VACANCY
WOS研究方向	Materials Science
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000539337000010
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/140393]
专题	中国科学院近代物理研究所
通讯作者	Gao, Ning; Guo, Liping
作者单位	1.Chinese Acad Sci, Inst Modern Phys, Lanzhou 73000, Peoples R China 2.China Ship Dev & Design Ctr, Wuhan 430072, Hubei, Peoples R China 3.ShanDong Univ, Key Lab Particle Phys & Particle Irradiat MOE, Qingdao 266237, Peoples R China 4.ShanDong Univ, Inst Frontier & Interdisciplinary Sci, Qingdao 266237, Peoples R China 5.Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Hubei, Peoples R China 6.Wuhan Univ, Key Lab Artificial Micro & Nanostruct, Hubei Nucl Solid Phys Key Lab, Minist Educ, Wuhan 430072, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Wei, Yaxia,Gao, Ning,Shen, Zhenyu,et al. Interactions between hydrogen bubbles and prismatic interstitial dislocation loops in BCC iron[J]. COMPUTATIONAL MATERIALS SCIENCE,2020,180:8.
APA	Wei, Yaxia,Gao, Ning,Shen, Zhenyu,Chen, Cheng,Xie, Ziyang,&Guo, Liping.(2020).Interactions between hydrogen bubbles and prismatic interstitial dislocation loops in BCC iron.COMPUTATIONAL MATERIALS SCIENCE,180,8.
MLA	Wei, Yaxia,et al."Interactions between hydrogen bubbles and prismatic interstitial dislocation loops in BCC iron".COMPUTATIONAL MATERIALS SCIENCE 180(2020):8.