利用X射线衍射线形分析方法, 研究了TiB2/6351Al和6351Al喷丸形变层的再结晶行为, 并得到了两种材 料不同温度下等温退火晶块尺寸和显微畸变的变化. 通过回归分析, 获得了晶块长大激活能和显微畸变松弛激活 能. 结果表明, 两种材料的再结晶激活能均大于纯Al的自扩散激活能, 并且复合材料的再结晶激活能略大于铝合 金基体的再结晶激活能. 增强体阻碍加热过程中晶界 和亚晶界的运动影响了复合材料再结晶激活能的提高.
The recrystallization processes of TiB2/6351Al and 6351Al deformation layers introduced by shot peening were investigated. The domain size and microstrain during annealing were calculated utilizing X-ray diffraction line profile analysis. The domain growth activation energy and microstrain relaxation activation energy were obtained by computer regression analysis. The results show that the recrystallization activation energy of both materials is larger than that of aluminum self-diffusion activation energy. And the recrystallization activation energy of composite is slight larger than that of alloy. Reinforcements have two effects on recrystallization process. Firstly, they will promote recrystallization of matrix at the early stage of annealing. Furthermore, they will impede the movement of grain and subgrain boundaries during annealing. The combination of the two opposite effects together with the lower volume of reinforcements and their inevitable inhomogeneous distribution weaken the influence of reinforcements on recrystallization activation energy.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | |
| [6] | |
| [7] | |
| [8] | |
| [9] | |
| [10] | |
| [11] |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%