采用连续定向凝固方法可以制备具有连续柱状晶组织的纯铜杆坯，这种杆坯具有优良的塑性加工延伸性能和导电性能。利用有色金属研究院研制的介观力学观察设备，用自制的连续柱状晶加工成双晶体的拉伸样品，对其拉伸变形行为进行了研究。结果表明：在连续柱状晶纯铜变形过程中，不同的晶粒由于取向不同，产生不同的滑移方式，并且在变形过程中产生了亚晶粒。通过能量计算证明了新晶粒的产生。在连续柱状晶纯铜变形过程中，晶界有明显的协调变形的作用，正是由于这种作用，使得连续柱状晶纯铜可以产生很大的塑性变形。
The pure copper bar with continuous columnar crystals, which had excellent plastic workability and conductivity, was fabricated by continuous unidirectional solidification process with vacuum melting and argon protecting. This paper investigates the copper bar’s plastic deformation behavior through mesomechanical analysis with the device developed by General Research Institute for Nonferrous Metals. It was found that during the deformation, different crystals had different slip systems because of different crystal orientation, and the nucleation of a sub-grain was observed. Grain boundary played an important role in the deformation, which is the reason for excellent plastic workability.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | |
| [6] | |
| [7] | |
| [8] | |
| [9] | |
| [10] |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%