Brittle versus ductile fracture behaviour in nanotwinned FCC crystals

Authors

Linqing Pei, University of WollongongFollow
Cheng Lu, University of WollongongFollow
A Kiet Tieu, University of WollongongFollow
Xing Zhao, University of WollongongFollow
Liang Zhang, University of WollongongFollow
Kuiyu Cheng, University of WollongongFollow
Guillaume Michal, University of WollongongFollow

RIS ID

99883

Publication Details

Pei, L., Lu, C., Tieu, K., Zhao, X., Zhang, L., Cheng, K. & Michal, G. (2015). Brittle versus ductile fracture behaviour in nanotwinned FCC crystals. Materials Letters, 152 65-67.

Abstract

Molecular dynamic simulation (MD) was used to study the brittle versus ductile fracture behaviour in nanotwinned Face Centred Cubic (FCC) crystals subjected to the uniaxial tensile deformation. A fundamental brittle versus ductile fracture is observed, which can be mainly understood in terms of the ratio of surface energy to unstable stacking fault energy or the ratio of ideal tensile strength to ideal shear strength in atomic model with a confined range of twinning spacing. Results show that the small ratio value is favourable for the brittle fracture, and vice versa, the big one supports the ductile fracture.