Atomistic simulation study on the tensile deformation behaviour ofnanocrystalline Ni

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	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)
会议录名称	Advances in Functional and Electronic Materials
	2013
页码	315-320
会议名称	Chinese Materials Congress 2012, CMC 2012
会议日期	JUL 13-18, 2012
会议地点	Taiyuan, China
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.
课题组名称	LNM材料介观力学性能的表征
ISBN号	978-3-03785-607-9
URL	查看原文
收录类别	EI
语种	英语
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/48291
专题	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]Advances in Functional and Electronic Materials,2013:315-320.

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