Hydrostatic pressure effects on deformation mechanisms of nanocrystalline fcc metals
Fuping Yuan,Xiaolei Wu +1 more
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TLDR
In this paper, a series of large-scale molecular dynamics simulations have been performed to investigate hydrostatic pressure effects, and the interplay between pressure and grain size, on the flow stress and the related atomic-level deformation mechanisms in nanocrystalline (NC) Cu.About:
This article is published in Computational Materials Science.The article was published on 2014-04-01 and is currently open access. It has received 15 citations till now. The article focuses on the topics: Hydrostatic pressure & Deformation mechanism.read more
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Simulation and analysis of a seawater hydraulic relief valve in deep-sea environment
TL;DR: Considering the deformation of a designed seawater direct-acting relief valve (SDARV) in deep-sea environment, which has a significant influence on the dynamic performance, the mathematic model of SDARV was established and related dynamic characteristic simulations were conducted.
Journal ArticleDOI
Multi-nanoparticle model simulations of the porosity effect on sintering processes in Ni/YSZ and Ni/ScSZ by the molecular dynamics method
Jingxiang Xu,Shandan Bai,Yuji Higuchi,Nobuki Ozawa,Kazuhisa Sato,Toshiyuki Hashida,Momoji Kubo +6 more
TL;DR: Xu et al. as discussed by the authors used a multi-nanoparticle sintering simulation method to reveal the effect of porosity on the sinterings of Ni nanoparticles in porous anodes.
Journal ArticleDOI
MD-based characterization of plastic deformation in Cu/Ag nanocomposites via dislocation extraction analysis: Effects of nanosized surface porosities and voids
A. Kardani,A. Montazeri +1 more
TL;DR: In this paper, the role of porosities on the deformation mechanism of copper-silver nanocomposites under uniaxial tensile loading conditions was investigated, and several perfect and defected samples were systematically studied through molecular dynamics simulation.
Journal ArticleDOI
Stress-induced solid-state amorphization of nanocrystalline Ni and NiZr investigated by atomistic simulations
TL;DR: In this article, the feasibility of stress induced solid-state amorphization (SSA) of nanocrystalline (NC) Ni and NiZr alloys having ∼10nm grain size has been investigated under constant tensile load (uniaxial and triaxial) via molecular dynamics simulations.
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Tribocorrosion Behavior of Nanocrystalline Metals — a Review
Zhongwei Wang,Yu Yan,Lijie Qiao +2 more
TL;DR: In this article, a review of the wear, corrosion and tribocorrosion behavior of nanocrystalline metal materials is presented, showing that nanocrystization could enhance the wear resistance of materials by increasing the hardness and decrease the corrosion rate by forming continuous and compact passive layer.
References
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Mechanical properties of nanocrystalline materials
TL;DR: The mechanical properties of nanocrystalline materials are reviewed in this paper, with emphasis on their constitutive response and on the fundamental physical mechanisms, including the deviation from the Hall-Petch slope and possible negative slope, the effect of porosity, the difference between tensile and compressive strength, the limited ductility, the tendency for shear localization, fatigue and creep responses.
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Ultrahigh strength and high electrical conductivity in copper
TL;DR: Pure copper samples with a high density of nanoscale growth twins are synthesized and show a tensile strength about 10 times higher than that of conventional coarse-grained copper, while retaining an electrical conductivity comparable to that of pure copper.
Journal ArticleDOI
Structural stability and lattice defects in copper: Ab initio , tight-binding, and embedded-atom calculations
TL;DR: In this article, the ability of the embedded-atom method (EAM) and the tight-binding (TB) method to predict reliably energies and stability of nonequilibrium structures by taking Cu as a model material was evaluated.
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Revealing the Maximum Strength in Nanotwinned Copper
TL;DR: The maximum strength of nanotwinned copper samples with different twin thicknesses is investigated, finding that the strength increases with decreasing twin thickness, reaching a maximum at 15 nanometers, followed by a softening at smaller values that is accompanied by enhanced strain hardening and tensile ductility.
Journal ArticleDOI
Softening of nanocrystalline metals at very small grain sizes
TL;DR: In this paper, the deformation of nanocrystalline copper has been studied and it is shown that the hardness and yield stress of the material typically increase with decreasing grain size, a phenomenon known as the reverse Hall-Petch effect.
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