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Atomistic simulation on the structure and mechanical response of Σ3, Σ5 tilt grain boundaries under tension

Conference Paper


Abstract


  • Atomistic simulations are carried out on a serials of symmetric and asymmetric Σ3 [1 10] and Σ5 [0 0 1] grain boundaries (GBs) of Cu to investigate their structures and mechanical response under tension. The equilibrium OK GB structures are generated by molecular statics simulation. It is found that Σ3 and Σ5 asymmetric GBs with different inclination angles are composed of only two structural units which are corresponding to their symmetric GBs. Molecular dynamics simulations are performed by applying a constant tensile strain on the bicrystal model with different Σ3 and Σ5 GBs. Simulation results show that the maximum tensile strength of the symmetric Σ3 and Σ5 GBs are higher than their asymmetric GBs, suggesting the symmetric GBs may have a more stable boundary structures.

Publication Date


  • 2014

Citation


  • Zhang, L., Lu, C., Tieu, A. K., Zhao, X., Pei, L. & Cheng, K. (2014). Atomistic simulation on the structure and mechanical response of Σ3, Σ5 tilt grain boundaries under tension. TMS2014 143rd Annual Meeting & Exhibition: Annual Meeting Supplemental Proceedings (pp. 817-823). United States: John Wiley & Sons.

Scopus Eid


  • 2-s2.0-84899707062

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3395

Start Page


  • 817

End Page


  • 823

Abstract


  • Atomistic simulations are carried out on a serials of symmetric and asymmetric Σ3 [1 10] and Σ5 [0 0 1] grain boundaries (GBs) of Cu to investigate their structures and mechanical response under tension. The equilibrium OK GB structures are generated by molecular statics simulation. It is found that Σ3 and Σ5 asymmetric GBs with different inclination angles are composed of only two structural units which are corresponding to their symmetric GBs. Molecular dynamics simulations are performed by applying a constant tensile strain on the bicrystal model with different Σ3 and Σ5 GBs. Simulation results show that the maximum tensile strength of the symmetric Σ3 and Σ5 GBs are higher than their asymmetric GBs, suggesting the symmetric GBs may have a more stable boundary structures.

Publication Date


  • 2014

Citation


  • Zhang, L., Lu, C., Tieu, A. K., Zhao, X., Pei, L. & Cheng, K. (2014). Atomistic simulation on the structure and mechanical response of Σ3, Σ5 tilt grain boundaries under tension. TMS2014 143rd Annual Meeting & Exhibition: Annual Meeting Supplemental Proceedings (pp. 817-823). United States: John Wiley & Sons.

Scopus Eid


  • 2-s2.0-84899707062

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3395

Start Page


  • 817

End Page


  • 823