Molecular Dynamics Study on the Effect of Temperature on Deformation Mechanism of Magnesium Nanopillars with Square Cross-Sections

作者：Xu, Shuang^*; Guo, Ya-Fang

来源：Nanoscience and Nanotechnology Letters, 2016, 8(7): 603-606.

DOI：10.1166/nnl.2016.2221

• Deformation Mechanisms
• Magnesium Nanopillars
• Molecular Dynamics

In this study, molecular dynamics simulations were performed to study the [0001] compression deformation of magnesium nanopillars with square cross-sections at various temperatures. Single crystal magnesium nanopillars with the side-length of 10-30 nm were examined via employing embedded atom potential. Simulation results showed a strong temperature dependence on the mechanism for initial yielding as compared to that of plastic flow. The initial yielding was caused by the nucleation of < c + a > first-order pyramidal (pi 1) slip at 10-250 K, in contrast to deformation twinning at 300-500 K. The governing mechanism for plastic flow over the temperature range from 10 to 500 K was the multiplication and interaction of the < c + a > slip and basal slip.

• 出版日期2016-7
• 单位中国地震局工程力学研究所; 武汉理工大学; 北京交通大学