A trans-scale model for size effects and intergranular fracture in nanocrystalline and ultra-fine polycrystalline metals

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	A trans-scale model for size effects and intergranular fracture in nanocrystalline and ultra-fine polycrystalline metals
	Wu B(吴波); Liang LH(梁立红); Ma HS(马寒松); Wei YG(魏悦广); Wei, YG
刊名	COMPUTATIONAL MATERIALS SCIENCE
	2012-05-01
通讯作者邮箱	Ywei@LNM.imech.ac.cn
卷号	57 页码:2-7
关键词	Interface energy effect Strain gradient effect Intergranular fracture Nanocrystalline metal Cohesive model Strain Gradient Plasticity Nanoindentation Test Mechanical-Behavior Conventional Theory Crack-Growth Deformation Solids Interface Nickel
ISSN号	0927-0256
通讯作者	Wei, YG ; Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
产权排序	[Wu, Bo;Liang, Lihong; Ma, Hansong; Wei, Yueguang] Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China
中文摘要	A trans-scale mechanics model considering both strain gradient and interface energy effects is presented for describing size effects in nanocrystalline and ultra-fine polycrystalline metals accompanying by intergranular fracture. A finite element method is developed which is suitable for describing the strain gradient and interface energy effects. Moreover, cohesive interface model is used to study the intergranular damage and fracture in polycrystalline metals with nanoscale and ultra-fine grains. A systematical study on the overall strength and ductility of polycrystalline aggregates which depend on both grain interiors and grain boundaries for different grain sizes and different interface properties is performed. The results show that the overall strength and ductility of polycrystalline aggregates with nanoscale and ultra-fine grains strongly depend on the grain size and grain hardening, interface energy density, grain boundary strength and toughness.
学科主题	固体力学
分类号	二类/Q2
收录类别	SCI ; EI
资助信息	The subject is supported by the National Science Foundation of China through Grant Nos. 11021262, 10932011, and 90816004.
原文出处	http://dx.doi.org/10.1016/j.commatsci.2011.03.045
语种	英语
WOS记录号	WOS:000300990200002
公开日期	2013-01-18
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/46665]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Wei, YG
推荐引用方式 GB/T 7714	Wu B,Liang LH,Ma HS,et al. A trans-scale model for size effects and intergranular fracture in nanocrystalline and ultra-fine polycrystalline metals[J]. COMPUTATIONAL MATERIALS SCIENCE,2012,57:2-7.
APA	吴波,梁立红,马寒松,魏悦广,&Wei, YG.(2012).A trans-scale model for size effects and intergranular fracture in nanocrystalline and ultra-fine polycrystalline metals.COMPUTATIONAL MATERIALS SCIENCE,57,2-7.
MLA	吴波,et al."A trans-scale model for size effects and intergranular fracture in nanocrystalline and ultra-fine polycrystalline metals".COMPUTATIONAL MATERIALS SCIENCE 57(2012):2-7.