High temperature deformation of Al2O3/Cu composites

被引：0

作者：

Wu, Jianjun ^{[1
]}

Zhang, Yun ^{[1
]}

Jiang, Yanfei ^{[1
]}

Xue, Meiyun ^{[1
]}

Lei, Tingquan ^{[1
]}

机构：

[1] Dept. of Mat. Sci. and Eng., Hebei Univ. of Technol., Tianjin 300130, China

来源：

Journal of Materials Science and Technology | 2001年 / 17卷 / 03期

关键词：

Alumina - Copper alloys - Deformation - High temperature effects - Internal oxidation;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

This work concerns with the high temperature deformation of internally oxidized Al2O3/Cu composites. The investigation revealed that dispersive alumina can obstruct dislocation sliding and define the subgrain size thereby improve significantly the strength of the materials at high temperature. The sliding of dislocations is a main deformation mechanism in the given temperature range. The sliding of grain boundary and diffusive creep play important roles at high temperature and low strain rate. The dispersoids can raise the recrystallization temperature to higher than 1223 K. Dynamic recovery is a main softening way under the experimental conditions. Higher deformation rate and lower deformation temperature imply a higher flow stress.

引用

页码：325 / 328