Study on the Fabrication of Nanocrystalline Copper by Explosive Dynamic Loading

摘要：

By the method of severe plastic deformation at high strain rate of coarse-grained copper under explosively dynamic loading, nanocrystalline copper with the average grain size less than 200 nanometer was fabricated. The mechanism of grain-refining was investigated by means of transmission electron microscopy. Finally, the deformation processes were simulated using Ls-Dyna3d finite element program and the effects of the strain, strain rate as well as temperature rise on grain-refining were analysed systematically. The results show that it is feasible to fabricate nanocrystalline copper by explosively dynamic plastic deformation of coarse-grained copper; twin crystal and dislocation are the main mechanism of grain-refining; higher strain and lower temperature rise are beneficial to the grain refining; the distribution of the grain size is not uniform along the loading direction.

作者: Jin Xiang Wang Nan Zhou Rui Yang

作者单位: Science and Technology on Transient Physics Laboratory,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,P.R.China

会议类型: 国际会议

会议名称: 5th International Conference on Nanomaterials by Severe Plastic Deformation(第五届剧烈塑性变形纳米材料国际会议)

会议地点: 南京

会议语种:英文

页码: 109-114

在线出版日期: 2011-03-01（万方平台首次上网日期，不代表论文的发表时间）