A short review on the phase structures, oxidation kinetics, and mechanical properties of complex Ti-Al alloys

• Main Authors: Hooi, Peng Lim, Liew, Willey Yun Hsien, Gan, Melvin Jet Hong, Zhong-Tao Jiang
• Format: Article
• Language: English; English
• Published: MDPI 2021
• Subjects: QC Physics; QD Chemistry; TN Mining engineering. Metallurgy
• Online Access: https://eprints.ums.edu.my/id/eprint/27200/1/A%20short%20review%20on%20the%20phase%20structures%2C%20oxidation%20kinetics%2C%20and%20mechanical%20properties%20of%20complex%20Ti-Al%20alloys%20FULL%20TEXT.pdf; https://eprints.ums.edu.my/id/eprint/27200/2/A%20short%20review%20on%20the%20phase%20structures%2C%20oxidation%20kinetics%2C%20and%20mechanical%20properties%20of%20complex%20Ti-Al%20alloys%20ABSTRACT.pdf; https://eprints.ums.edu.my/id/eprint/27200/; https://www.mdpi.com/1996-1944/14/7/1677/htm; https:// doi.org/10.3390/ma14071677

This paper reviews the phase structures and oxidation kinetics of complex Ti-Al alloys at oxidation temperatures in the range of 600–1000 °C. The mass gain and parabolic rate constants of the alloys under isothermal exposure at 100 h (or equivalent to cyclic exposure for 300 cycles) is compared. Of the alloying elements investigated, Si appeared to be the most effective in improving the oxidation resistance of Ti-Al alloys at high temperatures. The effect of alloying elements on the mechanical properties of Ti-Al alloys is also discussed. Significant improvement of the mechanical properties of Ti-Al alloys by element additions has been observed through the formation of new phases, grain refinement, and solid solution strengthening.