Atomistic simulation study on the tensile deformation behaviour ofnanocrystalline Ni

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Atomistic simulation study on the tensile deformation behaviour ofnanocrystalline Ni
	Li WB(李文彬); Yuan FP(袁福平); Wu XL(武晓雷); Li WB(李文彬)
	2013
会议名称	Chinese Materials Congress 2012, CMC 2012
会议日期	JUL 13-18, 2012
通讯作者邮箱	liwenbin0115@163.com
会议地点	Taiyuan, China
卷号	745-746
页码	315-320
通讯作者	李文彬
中文摘要	Using molecular dynamics simulations, the influence of transverse tensile stresses on theplastic deformation behaviour of nanocrystalline (NC) Ni under tension has been investigated. Thesample with an average grain size of 20 nm was created using a Voronoi construction, and twodifferent tensile tests of the sample were performed at a constant strain rate. The simulation resultsrevealed that more partials were emitted from the grain boundaries and propagate into the graininteriors after adding the transverse tensile stress, enhancing the dislocation density in the graininteriors. This increased dislocation density can cause additional strain hardening observed in thestress strain curve. Meanwhile, it was observed from microstructures that nanovoids are easier toform and coalesce into cracks under the biaxial stress state, causing strain softening. The twocompeting effects of the transverse tensile stress on the plastic deformation behaviour of NC Niresulted in the flow stresses from 4% to 10% strain in the biaxial stress state slightly larger thanthose in the uniaxial stress state.
收录类别	EI
产权排序	[Li Wenbin;Yuan Fuping;Wu Xiaolei] State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
会议网址	http://www.scientific.net/MSF.745-746.315
会议录	Advances in Functional and Electronic Materials
会议录出版者	TRANS TECH PUBLICATIONS LTD, ZURICH-DURNTEN
语种	英语
ISSN号	0255-5476
ISBN号	978-3-03785-607-9
内容类型	会议论文
源URL	[http://dspace.imech.ac.cn/handle/311007/48291]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Li WB(李文彬)
推荐引用方式 GB/T 7714	Li WB,Yuan FP,Wu XL,et al. Atomistic simulation study on the tensile deformation behaviour ofnanocrystalline Ni[C]. 见:Chinese Materials Congress 2012, CMC 2012. Taiyuan, China. JUL 13-18, 2012.http://www.scientific.net/MSF.745-746.315.