2022年10月15日
Effects of oxygen addition on the microstructure, phase transformations, and oxidation resistance of TiAl alloys
Journal of Alloys and Compounds
- ,
- ,
- ,
- 巻
- 918
- 号
- 開始ページ
- 165716
- 終了ページ
- 165716
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.jallcom.2022.165716
- 出版者・発行元
- Elsevier {BV}
This study investigated the effects of oxygen addition on the microstructure, phase transformations, and oxidation resistance of TiAl alloys at 1023 K. The addition of oxygen stabilized the alpha (alpha 2) phase at the expense of the gamma phase and reduced the oxidation mass gains of the TiAl alloys by more than 20%. Oxide scales composed of external scattered Ti-rich oxide particles/Al-rich/Ti-rich mixed Ti/Al oxides, and internal affected zones with Al-rich precipitates were observed in all oxidized samples. The results showed that the microstructure and phase transformations of the alloys were altered by adding 1 at% oxygen. The addition of O accelerated the alpha -> alpha 2 chemical ordering reaction and partly suppressed the alpha -> gamma massive phase transformation. The oxidation resistance of the TiAl alloys in air at 1023 K was not significantly affected by the addition of oxygen.
- リンク情報
- ID情報
-
- DOI : 10.1016/j.jallcom.2022.165716
- ISSN : 0925-8388
- eISSN : 1873-4669
- ORCIDのPut Code : 114474901
- Web of Science ID : WOS:000816114000003