IMECH-IR  > 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)
Source PublicationAdvances in Functional and Electronic Materials
2013
Pages315-320
Conference NameChinese Materials Congress 2012, CMC 2012
Conference DateJUL 13-18, 2012
Conference PlaceTaiyuan, China
AbstractUsing 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.
DepartmentLNM材料介观力学性能的表征
ISBN978-3-03785-607-9
URL查看原文
Indexed ByEI
Language英语
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/48291
Collection非线性力学国家重点实验室
Corresponding AuthorLi WB(李文彬)
Recommended Citation
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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