Abstract
The evolution of grain morphology is accompanied with grain boundary (GB) migration, and the grain morphology significantly determines the properties. Therefore, the key problem in engineering research is to obtain expected microstructures by controlling GB migration. The understanding on GB migration in metals was reviewed and the current study on TiAl alloys was given in this paper. Firstly, the phenomenon and physical model of GB migration were introduced. Then the driving force, especially the diffusion and stress, was analyzed. Secondly, the influence factors of GB migration were discussed, including misorientation, grain boundary triple junctions, curvature, temperature and thermal gradient. Finally, some applications of the regulation of GB migration were introduced. Combined with in-situ observation of the author, the GB migrations of TiAl alloys in single-phase regions at high temperatures were analyzed.
| Translated title of the contribution | Research Progress of Grain Boundary Migration and Its In-situ Study on TiAl Alloys |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 699-708 |
| Number of pages | 10 |
| Journal | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
| Volume | 50 |
| Issue number | 2 |
| State | Published - Feb 2021 |