Open AccessMolecular dynamics simulation of effect of tilt angle on mechanical property of magnesium bicrystals
Author(s) -
Wang Chen,
H.Y. Song,
An Min-Rong
Publication year - 2014
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.63.046201
Subject(s) - materials science , magnesium , molecular dynamics , nucleation , grain boundary , twist , dislocation , tilt (camera) , deformation (meteorology) , metal , plasticity , condensed matter physics , composite material , metallurgy , thermodynamics , microstructure , geometry , computational chemistry , physics , chemistry , mathematics
The effects of grain boundary on the deformation behavior of magnesium bicrystals under tensile loading are investigated using molecular dynamics simulation method. Deformation mechanisms of both asymmetric and symmetric magnesium bicrystals are studied. The results show that the twist angle could exert a significant influence on the flow stress in the plastic stage. It is found that the plastic property of symmetric magnesium bicrystal is much better than that of asymmetric counterpart. In addition, for bicrystalline metal with large twist angle, its plastic response is better than that with small angle, owing to the dislocation nucleation activity in the grain boundary region.