Investigation on crack propagation in single crystal Ag with temperature dependence

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Xue Feng Liu
  • Jin Bao Wang
  • Li Gang Sun
  • Ying Yan Zhang
  • Mei Ling Tian

Detail(s)

Original languageEnglish
Pages (from-to)3553-3563
Journal / PublicationJournal of Materials Research
Volume30
Issue number22
Publication statusPublished - 2 Nov 2015

Abstract

Crack propagation behaviors in a precracked single crystal Ag under mode I loading at different temperatures are studied by molecular dynamics simulation. The simulation results show that the crack propagation behaviors are sensitive to external temperature. At 0 K, the crack propagates in a brittle manner. Crack tip blunting and void generation are first observed followed by void growth and linkage with the main crack, which lead to the propagation of the main crack and brittle failure immediately without any microstructure evolution. As the temperature gets higher, more void nucleations and dislocation emissions occur in the crack propagation process. The deformation of the single crystal Ag can be considered as plastic deformation due to dislocation emissions. The crack propagation dynamics characterizing the microstructure evolution of atoms around the crack tip is also shown. Finally, it is shown that the stress of the single crystal Ag changes with the crack length synchronously.

Research Area(s)

  • crack propagation, molecular dynamics simulation, single crystal Ag, temperature effect

Citation Format(s)

Investigation on crack propagation in single crystal Ag with temperature dependence. / Liu, Xue Feng; Wang, Jin Bao; Sun, Li Gang; Zhang, Ying Yan; Tian, Mei Ling; He, Xiao Qiao.

In: Journal of Materials Research, Vol. 30, No. 22, 02.11.2015, p. 3553-3563.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal