Directional solidification of Ti-45Al-8Nb-(W,B,Y) alloy |
| |
| Authors: | DING Xianfei LIN Junpin HE Jianping YE Feng CHEN Guoliang |
| |
| Affiliation: | State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China |
| |
| Abstract: | Using a Bridgman vertical vacuum furnace, Ti-45Al-8Nb-(W,B,Y) (at.%) bars, which were prepared from a plasma arc melting (PAM) ingot,were directionally solidified at growth rates of 10, 15, and 20 μ m/s. Polysynthetic twinned (PST) crystal with an aligned lamellar micro-structure was obtained at the growth rate of 15 μ m/s because of high Nb addition. The principle of PST crystal growth and the effect of Nb element were discussed. The results of investigations on microstructure and micromechanical properties of the directionally solidified (DS) bars of Ti-45Al-8Nb-(W,B,Y) alloy are briefly summarized. |
| |
| Keywords: | directional solidification TiAl alloys lamellar microstructure crystal growth |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
