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A dual fracture transition mechanism in nanotwinned Ni

Journal Article


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Abstract


  • Molecular dynamic simulation was used to study the brittle versus ductile fracture behaviour in nanotwinned Ni at various temperatures. The simulation results show that three temperature regimes correspond to three different fracture behaviours: brittle, brittle-to-ductile transition and ductile. A dual fracture transition mechanism in nanotwinned Ni within a small temperature interval was observed: (1) local phase transformation and (2) ledge formation ahead of the crack tip induced a sharp fracture transition from brittle mode to ductile mode. Our simulation results reveal that the very rare double fracture transition mechanisms could be transformed quickly in nanotwinned Ni within a narrow temperature interval, suggesting a new interpretation of fracture and deformation of nanotwinned Face Centred Cubic metals.

Authors


  •   Pei, Linqing (external author)
  •   Lu, Cheng
  •   Tang, Qian (external author)
  •   Tieu, A Kiet.
  •   Zhao, Xing (external author)
  •   Zhang, Liang (external author)

Publication Date


  • 2018

Citation


  • Pei, L., Lu, C., Tang, Q., Tieu, K., Zhao, X. & Zhang, L. (2018). A dual fracture transition mechanism in nanotwinned Ni. Materials Letters, 210 243-247.

Scopus Eid


  • 2-s2.0-85029390277

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1751&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/750

Number Of Pages


  • 4

Start Page


  • 243

End Page


  • 247

Volume


  • 210

Place Of Publication


  • Netherlands

Abstract


  • Molecular dynamic simulation was used to study the brittle versus ductile fracture behaviour in nanotwinned Ni at various temperatures. The simulation results show that three temperature regimes correspond to three different fracture behaviours: brittle, brittle-to-ductile transition and ductile. A dual fracture transition mechanism in nanotwinned Ni within a small temperature interval was observed: (1) local phase transformation and (2) ledge formation ahead of the crack tip induced a sharp fracture transition from brittle mode to ductile mode. Our simulation results reveal that the very rare double fracture transition mechanisms could be transformed quickly in nanotwinned Ni within a narrow temperature interval, suggesting a new interpretation of fracture and deformation of nanotwinned Face Centred Cubic metals.

Authors


  •   Pei, Linqing (external author)
  •   Lu, Cheng
  •   Tang, Qian (external author)
  •   Tieu, A Kiet.
  •   Zhao, Xing (external author)
  •   Zhang, Liang (external author)

Publication Date


  • 2018

Citation


  • Pei, L., Lu, C., Tang, Q., Tieu, K., Zhao, X. & Zhang, L. (2018). A dual fracture transition mechanism in nanotwinned Ni. Materials Letters, 210 243-247.

Scopus Eid


  • 2-s2.0-85029390277

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1751&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/750

Number Of Pages


  • 4

Start Page


  • 243

End Page


  • 247

Volume


  • 210

Place Of Publication


  • Netherlands