Exploration of the Defects Effect on the Mechanical Properties of Different Orientated Nanowires

摘要：

Molecular dynamics (MD) simulations have been carried out to investigate the defects effect on the mechanical properties of copper nanowire with different crystallographic orientations, under tensile deformation. Three different crystallographic orientations have been considered. The deformation mechanism has been carefully discussed. It is found that the Youngs modulus is insensitive to the defect, even when the nanowires crystallographic orientation is different. However, due to the defects effect, the yield strength and yield strain appear a large decrease. The defects have played a role of dislocation sources, the slips or stacking faults are first generated around the locations of the defects. The necking locations have also been affected by different defects. Due to the surface defect, the plastic deformation has received a large influence for the < 001>/110 and <110>orientated nanowires, and a relative small influence is seen for the < 111>nanowire.

关键词： Nanowires Defect Orientation Deformation Mechanism Molecular Dynamics

作者: H.F. Zhan Y.T. Gu

作者单位: School of Engineering Systems, Queensland University of Technology,Brisbane, QLD 4001, Australia

会议类型: 国际会议

会议名称: 2011 International Conference on Mechatronics and Materials Processing(2011年机电一体化与材料加工国际会议 ICMMP)

会议地点: 广州

会议语种:英文

页码: 1239-1244

在线出版日期: 2011-11-18（万方平台首次上网日期，不代表论文的发表时间）