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A dual deformation mechanism of grain boundary at different stress stages

Journal Article


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Abstract


  • Molecular dynamics (MD) simulation with embedded-atom method (EAM) potential was carried out to study the structure and shear response of an asymmetric tilt grain boundary in copper bicrystal. A non-planar structure with dissociated intrinsic stacking faults was observed in the grain boundary. Simulation results show that this type of structure can significantly increase the ductility of the simulation sample under shear deformation. A dual deformation mechanism of the grain boundary was observed; the grain boundary can be a source of dislocation emission and migrate itself at different stress stages. The result of this study can provide further information to understand the grain boundary mediated plasticity in nanocrystalline materials.

Publication Date


  • 2016

Citation


  • Zhang, L., Lu, C., Zhang, J. & Tieu, K. (2016). A dual deformation mechanism of grain boundary at different stress stages. Materials Letters, 167 278-283.

Scopus Eid


  • 2-s2.0-84954452071

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=6150&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/5123

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 278

End Page


  • 283

Volume


  • 167

Place Of Publication


  • Netherlands

Abstract


  • Molecular dynamics (MD) simulation with embedded-atom method (EAM) potential was carried out to study the structure and shear response of an asymmetric tilt grain boundary in copper bicrystal. A non-planar structure with dissociated intrinsic stacking faults was observed in the grain boundary. Simulation results show that this type of structure can significantly increase the ductility of the simulation sample under shear deformation. A dual deformation mechanism of the grain boundary was observed; the grain boundary can be a source of dislocation emission and migrate itself at different stress stages. The result of this study can provide further information to understand the grain boundary mediated plasticity in nanocrystalline materials.

Publication Date


  • 2016

Citation


  • Zhang, L., Lu, C., Zhang, J. & Tieu, K. (2016). A dual deformation mechanism of grain boundary at different stress stages. Materials Letters, 167 278-283.

Scopus Eid


  • 2-s2.0-84954452071

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=6150&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/5123

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 278

End Page


  • 283

Volume


  • 167

Place Of Publication


  • Netherlands