A micromechanical model for nano-metallic-multilayers with helium   irradiation

doi:10.1016/j.ijsolstr.2016.09.033

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	A micromechanical model for nano-metallic-multilayers with helium irradiation
	Yu, Long ; Xiao, Xiazi ; Chen, Lirong ; Chu, Haijian ; Duan, Huiling
刊名	INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
	2016
关键词	Nano-metallic-multilayers He bubble effect Size effect Irradiation hardening CU-NB MULTILAYERS CRYSTAL PLASTICITY NANOLAYERED COMPOSITES MECHANICAL-PROPERTIES IMPERFECT INTERFACES STAINLESS-STEEL THIN-FILMS HE DISLOCATION DEFORMATION
DOI	10.1016/j.ijsolstr.2016.09.033
英文摘要	Nano-metallic-multilayers (NMMs) have attractive irradiation-tolerant properties due to the high ratio of interfaces acting as effective sinks for irradiation-induced defects, like helium bubbles. The mechanical behaviour of NMMs can be affected by both interfaces and He bubbles, which is closely related to the layer thickness. In this work, the macroscopic mechanical behaviours of Cu/Nb multilayers with irradiation-induced He bubbles are explored by the crystal plasticity model (CPM) coupled with the elastic-viscoplastic self-consistent (EVPSC) method. At the microscale, hardening effects of He bubbles, interfaces and forest dislocations are evaluated by considering their influences on the critical shear resistance of dislocation movement. At the grain level, the equivalent mechanical properties of a composite grain consisting of different individual grains and interfaces are obtained by the Mod-Tanaka method. At the macroscale, the self-consistent scheme is adopted to predict the macroscopic mechanical behavior of NMMs which are made of composite grains. Numerical results of the proposed model match well with corresponding experimental data. (C) 2016 Elsevier Ltd. All rights reserved.; National Natural Science Foundation of China (NSFC) [11225208, 11521202, 11632001]; SCI(E); ARTICLE; hlduan@pku.edu.cn; 267-274; 102
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/458044]
专题	工学院
推荐引用方式 GB/T 7714	Yu, Long,Xiao, Xiazi,Chen, Lirong,et al. A micromechanical model for nano-metallic-multilayers with helium irradiation[J]. INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES,2016.
APA	Yu, Long,Xiao, Xiazi,Chen, Lirong,Chu, Haijian,&Duan, Huiling.(2016).A micromechanical model for nano-metallic-multilayers with helium irradiation.INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES.
MLA	Yu, Long,et al."A micromechanical model for nano-metallic-multilayers with helium irradiation".INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES (2016).