MICROSTRUCTURE AND MECHANICAL PROPERTIES OF COPPER SUBJECTED TO HIGH PRESSURE TORSION

摘要：

Experiments were conducted on copper subjected to High Pressure Torsion to investigate the evolution of microstructure and microhardness with shear strain,γ.Observations have been carried out in the longitudinal section for a proper demonstration of the structure morphology.An elongated dislocation cell/subgrain structure was observed at relatively low strain level.With increasing strain,the elongated subgrains transformed into elongated grains and finally into equiaxed grains with high angle grain boundaries.Measurements showed the hardness increases with increasing γ then tends to saturations when γ ＞5.The variation tendency of microhardness with γ can be simulated by Voce-type equation.

关键词： copper microstructure microhardness High Pressure Torsion

作者: Z.L.Xie Y.S.Hong

作者单位: State Key Laboratory of Nonlinear Mechanics,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100080,China

会议类型: 国际会议

会议名称: 第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)

会议地点: 安徽黄山

会议语种:英文

页码: 411-414

在线出版日期: 2008-06-03（万方平台首次上网日期，不代表论文的发表时间）