Skip to main content
placeholder image

Deformation mechanisms in nanotwinned copper by molecular dynamics simulation

Journal Article


Abstract


  • Nanotwinned materials exhibit simultaneous ultrahigh strength and high ductility which is attributed to the

    interactions between dislocations and twin boundaries but the specific deformation mechanisms are rarely seen

    in experiments at the atomic level. Here we use large scale molecular dynamics simulations to explore this

    intricate interplay during the plastic deformation of nanotwinned Cu. We demonstrate that the dominant

    deformation mechanism transits dynamically from slip transfer to twin boundary migration to slip-twin

    interactions as the twin boundary orientation changes from horizontal to slant, and then to a vertical direction.

    Building on the fundamental physics of dislocation processes from computer simulations and combining the

    available experimental investigations, we unravel the underlying deformation mechanisms for nanotwinned Cu,

    incorporating all three distinct dislocation processes. Our results give insights into systematically engineering

    the nanoscale twins to fabricate nanotwinned metals or alloys that have high strength and considerable ductility.

Authors


  •   Zhao, Xing (external author)
  •   Lu, Cheng
  •   Tieu, A Kiet.
  •   Pei, Linqing (external author)
  •   Zhang, Liang (external author)
  •   Su, Lihong
  •   Zhan, Lihua (external author)

Publication Date


  • 2017

Citation


  • Zhao, X., Lu, C., Tieu, A. Kiet., Pei, L., Zhang, L., Su, L. & Zhan, L. (2017). Deformation mechanisms in nanotwinned copper by molecular dynamics simulation. Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing, 687 343-351.

Scopus Eid


  • 2-s2.0-85010878012

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1929

Has Global Citation Frequency


Number Of Pages


  • 8

Start Page


  • 343

End Page


  • 351

Volume


  • 687

Place Of Publication


  • Netherlands

Abstract


  • Nanotwinned materials exhibit simultaneous ultrahigh strength and high ductility which is attributed to the

    interactions between dislocations and twin boundaries but the specific deformation mechanisms are rarely seen

    in experiments at the atomic level. Here we use large scale molecular dynamics simulations to explore this

    intricate interplay during the plastic deformation of nanotwinned Cu. We demonstrate that the dominant

    deformation mechanism transits dynamically from slip transfer to twin boundary migration to slip-twin

    interactions as the twin boundary orientation changes from horizontal to slant, and then to a vertical direction.

    Building on the fundamental physics of dislocation processes from computer simulations and combining the

    available experimental investigations, we unravel the underlying deformation mechanisms for nanotwinned Cu,

    incorporating all three distinct dislocation processes. Our results give insights into systematically engineering

    the nanoscale twins to fabricate nanotwinned metals or alloys that have high strength and considerable ductility.

Authors


  •   Zhao, Xing (external author)
  •   Lu, Cheng
  •   Tieu, A Kiet.
  •   Pei, Linqing (external author)
  •   Zhang, Liang (external author)
  •   Su, Lihong
  •   Zhan, Lihua (external author)

Publication Date


  • 2017

Citation


  • Zhao, X., Lu, C., Tieu, A. Kiet., Pei, L., Zhang, L., Su, L. & Zhan, L. (2017). Deformation mechanisms in nanotwinned copper by molecular dynamics simulation. Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing, 687 343-351.

Scopus Eid


  • 2-s2.0-85010878012

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1929

Has Global Citation Frequency


Number Of Pages


  • 8

Start Page


  • 343

End Page


  • 351

Volume


  • 687

Place Of Publication


  • Netherlands