Influence of Defects and Crystallographic Orientation on Mechanical Behavior of Nanocrystalline Aluminium简

Simulation of molecular dynamics using Embedded Atom Method(EAM) potentials is performed to investigate the mechanical properties of single crystal Al along various crystallographic orientations under tensile loading.The specimens are provided with one or two embedded circular voids to analyze the d...

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Bibliographic Details
Published in:理论物理通讯：英文版 2016 (10), p.431-438
Main Author: 蔡军 邓琼 安敏荣 宋海洋 宿梦嘉
Format: Article
Language:English
Subjects:
Orientation
ultimate
tensile
ductility
dislocation
nucleation
modulus
yielding
elongation
stacking
Online Access:Get full text
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Summary:Simulation of molecular dynamics using Embedded Atom Method(EAM) potentials is performed to investigate the mechanical properties of single crystal Al along various crystallographic orientations under tensile loading.The specimens are provided with one or two embedded circular voids to analyze the damage evolution by void growth and coalescence.The simulation result shows that the Young’s modulus,yielding stress and ultimate stress decrease with the emergence of the voids.Besides,the simulations show that the single-crystal Al in different crystallographic orientations behaves differently in elongation deformations.The single-crystal Al with 100 crystallographic orientations has greater ductility than other orientated specimens.The incipient plastic deformation and the stress-strain curves are presented and discussed for further understanding of the mechanical properties of single-crystal Al.
ISSN:0253-6102