Effect of irradiation and irradiation defects on the mobility of Sigma 5 symmetric tilt grain boundaries in iron: An atomistic study

doi:10.1016/j.jnucmat.2018.07.020

	Effect of irradiation and irradiation defects on the mobility of Sigma 5 symmetric tilt grain boundaries in iron: An atomistic study
	Wang, X. Y.1; Gao, N.2; Xu, B.1; Wang, Y. N.1; Shu, G. G.3; Li, C. L.3; Liu, W.1
刊名	JOURNAL OF NUCLEAR MATERIALS
	2018-11
卷号	510 页码:568-574
关键词	Grain boundaries Radiation defects Grain growth Stress and strain
ISSN号	0022-3115
DOI	10.1016/j.jnucmat.2018.07.020
英文摘要	Body center cubic iron materials are commonly used in nuclear power plants. In bcc-iron, symmetric tilt grain boundaries (STGBs), which are believed to play important roles on self-healing, are susceptible to configuration and structural change under irradiation. The effect of such changes on mechanical properties of such GBs is still unknown. In this work, using molecular dynamics simulations, we find that the critical shear stress tau(c) required for Sigma 5 STGB migration is greatly reduced by either displacement cascade nearby or absorption of defect clusters. Moreover, we find that the trapping of radiation-induced interstitial-type dislocation loops could also decrease tau(c), indicating that displacement cascades could also exert a long-range effect on GBs due to the fast diffusion of interstitial clusters. (C) 2018 Published by Elsevier B.V.
资助项目	National Natural Science Foundation of China[11375242] ; National Natural Science Foundation of China[11675230] ; National Natural Science Foundation of China[91426301]
WOS关键词	MOLECULAR-DYNAMICS ; DISLOCATION LOOPS ; BCC IRON ; INTERSTITIAL EMISSION ; FE ; SIMULATIONS ; METALS ; MICROSTRUCTURE ; SEGREGATION ; CASCADES
WOS研究方向	Materials Science ; Nuclear Science & Technology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000446065100059
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/64401]
专题	中国科学院近代物理研究所
通讯作者	Xu, B.; Liu, W.
作者单位	1.Tsinghua Univ, Sch Mat Sci & Engn, Beijing 100084, Peoples R China 2.Inst Modern Phys, Lab Adv Nucl Mat, 509 NanChang Rd, Lanzhou 730000, Gansu, Peoples R China 3.China Nucl Power Engn Co Ltd, Sate Key Lab Nucl Power Safety Monitoring Technol, Shenzhen 518172, Peoples R China
推荐引用方式 GB/T 7714	Wang, X. Y.,Gao, N.,Xu, B.,et al. Effect of irradiation and irradiation defects on the mobility of Sigma 5 symmetric tilt grain boundaries in iron: An atomistic study[J]. JOURNAL OF NUCLEAR MATERIALS,2018,510:568-574.
APA	Wang, X. Y..,Gao, N..,Xu, B..,Wang, Y. N..,Shu, G. G..,...&Liu, W..(2018).Effect of irradiation and irradiation defects on the mobility of Sigma 5 symmetric tilt grain boundaries in iron: An atomistic study.JOURNAL OF NUCLEAR MATERIALS,510,568-574.
MLA	Wang, X. Y.,et al."Effect of irradiation and irradiation defects on the mobility of Sigma 5 symmetric tilt grain boundaries in iron: An atomistic study".JOURNAL OF NUCLEAR MATERIALS 510(2018):568-574.