High Temperature Oxidation and Wear Behaviors of Ti–V–Cr Fireproof Titanium Alloy
Abstract
:1. Introduction
2. Experimental Procedures
2.1. Materials Preparation
2.2. Oxidation Testing
2.3. Wear Testing
2.4. Microstructural Characterization
3. Results and Discussion
4. Conclusions
- (1)
- The oxidation gain of TF550 alloy was much larger than that of Ti64 alloy, attributed the abundant addition of vanadium, which was regarded as a positive factor to improve the burn resistance. The oxidation weight gain of TF550 alloy after oxidation at 873 K for 100 h was much smaller than that at 1073 K for 100 h. The thin surface oxide film was identified as oxides of TiO2 and V2O5 at 873 K, while the thick one was detected to be TiO2 only at 1073 K. The oxidation reaction rate at 1073 K followed the linear law, indicating that the oxidation process of this alloy was mainly controlled by the oxidation reaction at the interface between the substrate and oxide layer.
- (2)
- The friction coefficient at 873 K was larger than that at 1073 K, while the volume wear rate at 1073 K was larger because a large amount of oxides formed on the worn surface. The TiO2 oxide was detected on the worn surface at 873 K, and both oxides of TiO2 and V2O5 were present at 1073 K.
- (3)
- The presence of furrows and a tribo-oxide layer at 873 K indicated that the wear mechanism was dominated by a combination of abrasive wear and oxidative wear. The continuous tribo-oxide layer was present at 1073 K, indicating that the wear mechanism was dominated by oxidative wear.
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Temperature (K) | fm | Wsd (10−13·m3/Nm) | Wsp (10−13·m3/Nm) |
---|---|---|---|
873 | 0.394 ± 0.095 | 2.21 ± 0.35 | 0.197 ± 0.072 |
1073 | 0.286 ± 0.050 | - | 0.566 ± 0.039 |
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Mi, G.; Yao, K.; Bai, P.; Cheng, C.; Min, X. High Temperature Oxidation and Wear Behaviors of Ti–V–Cr Fireproof Titanium Alloy. Metals 2017, 7, 226. https://doi.org/10.3390/met7060226
Mi G, Yao K, Bai P, Cheng C, Min X. High Temperature Oxidation and Wear Behaviors of Ti–V–Cr Fireproof Titanium Alloy. Metals. 2017; 7(6):226. https://doi.org/10.3390/met7060226
Chicago/Turabian StyleMi, Guangbao, Kai Yao, Pengfei Bai, Congqian Cheng, and Xiaohua Min. 2017. "High Temperature Oxidation and Wear Behaviors of Ti–V–Cr Fireproof Titanium Alloy" Metals 7, no. 6: 226. https://doi.org/10.3390/met7060226