ATOMISTIC STUDY OF TIP RADIUS EFFECT OF NANOINDENTATION ON NANOCRYSTALLINE CU

摘要：

In current study we investigate deformation mechanisms of nanocrystalline Cu subjected to nanoindentation using atomistic simulation.Our results show that in addition to dislocation activities,grain boundaries associated mechanisms and deformation twinning are also observed during deformation process.Subsequent evaluation of indentation tip radius effects shows the maximum load for elastic-plastic deformation transition increases with increasing tip radius.There is a critical tip radius for mediating deformation mechanisms: below which dislocation density increase with increasing tip radius,while above which grain boundary associated mechanisms is more pronounced.

关键词： nanocrystalline Cu nanoindentation molecular dynamics tip radius

作者: J.J.Zhang T.Sun Y.D.Yan

作者单位: Center for Precision Engineering,Harbin Institute of Technology,Harbin 150001,China

会议类型: 国际会议

会议名称: The Third International Conference on Heterogeneous Material Mechanics(第三届国际非均匀材料力学会议)

会议地点: 上海

会议语种:英文

页码: 79-83

在线出版日期: 2011-05-22（万方平台首次上网日期，不代表论文的发表时间）