Effects of pre-deformation on precipitating behavior and grain refinement of AA2195 Al-Li alloy

被引：0

作者：

Zhang, Xin-Ming ^{[1
]}

Liu, Ying-Wei ^{[1
]}

Ye, Ling-Ying ^{[1
]}

Tang, Jian-Guo ^{[1
]}

机构：

[1] School of Materials Science and Engineering, Central South University, Changsha 410083, China

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2009年 / 40卷 / 02期

关键词：

Binary alloys - Grain refinement - Nucleation - Aspect ratio - Grain size and shape - Recrystallization (metallurgy) - Cold rolling - Deformation - Lithium alloys;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

In order to investigate the effects of the pre-deformation on second phase particles and recrystallization of AA2195 Al-Li alloy, cold-rolling pre-deformation prior to overaging was exploited in the traditional thermo- mechanical processing for grain refinement. The results show that the pre-deformation reduces the non-uniform distribution of the second phase particles along thickness of the plate, decreases the large rod particles with length of 5-10 μm and increases the particles with diameter of 0.8-2.0 μm dramatically, which results in increasing nucleation sites of recrystallization. In comparison with the sheet without pre-deformation, subsequent rolling and recrystallization decrease the final grain size and grain aspect ratio from 12.6 μm and 1.61 to 9.26 μm and 1.27 in the surface layer, and decrease the grain size and grain aspect ratio in the center layer from 14.62 μm and 2.47 to 11.27 μm and 1.70. Pre-deformation prior to overaging remarkably refine and spheroidize the grain structure of AA2195 Al-Li alloy.

引用

页码：376 / 382