Open AccessMolecular dynamics simulation of pore - containing single crystal magnesium stretching along different crystalline orientations
Author(s) -
Jinqi Tang,
Junping Yao
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/585/1/012140
Subject(s) - materials science , nucleation , molecular dynamics , void (composites) , magnesium , crystal (programming language) , crystallography , single crystal , deformation (meteorology) , deformation mechanism , dislocation , stacking fault , composite material , metallurgy , chemistry , thermodynamics , microstructure , computational chemistry , physics , computer science , programming language
The uniaxial stretching process of single crystal magnesium containing holes was simulated by molecular dynamics method, and the influence of the stretching crystal orientation on the growth and deformation of the holes was studied. Tensile simulations of different crystal orientations show that the microscopic mechanism of void growth and deformation in single crystal magnesium was different. For the orientation of the [1210] crystal, there will be small holes in the crystal at first, and with the process of loading, the polymerization of large and small holes will make the holes grow and then lead to the failure of the material. For the [0001] crystal orientation, the deformation mechanism was different from the former. In the early stage, it was caused by dislocation movement and stacking fault deformation, while in the later stage, it was mainly caused by twin nucleation and growth.