Study of Tension Process of Single Crystal Titanium Nano-Rod Based on the Molecular Dynamics

Hui Ling Jia; Zhao Xi Li; Xue Jie Liu; Yan Qi

doi:10.4028/www.scientific.net/AMM.268-270.168

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 268-270Study of Tension Process of Single Crystal...

Study of Tension Process of Single Crystal Titanium Nano-Rod Based on the Molecular Dynamics

Abstract:

In this paper, the axial tensile process of single crystal titanium nano-rod is simulated based on the Finnis-Sinclair embedded atom potential by molecular dynamics. The mechanical properties of the titanium nano-rod with different cross-section dimension along three orientations ([0001]、[-12-10]、[10-10]) are analyzed. The results show as follows: 1) The tension process of titanium nano-rod along three orientations all includes four stages which are elastic deformation, uniform plastic deformation, localized necking and fault stage. 2) The larger the cross-section is, the smaller the yield stress is. 3) Along the [0001] orientation the yield stress and elastic modulus of titanium nano-rod is the largest, but fracture strain is the smallest; along the [-12-10] orientation the yield stress and elastic modulus is the smallest, but the fracture strain is the largest; along the [10-10] orientation the tension mechanical properties is in the middle of the other two orientations.