TiAl alloys, with low density and excellent high-temperature properties, have become important materials for applications in oxidative environments above 600°C such as LPTBs, achieving the goals of achieving improved engine performance with simultaneous reduction in weight and emissions. TiAl alloys originated from Ti alloy research and have consistently focused on engine weight reduction as their primary objective, filling the gap in light alloys above 600°C. In the last decade, important advances have been made in both research and application of TiAl alloys. However, previous reviews have focused on individual areas. This paper comprehensively reviews the characteristic, history and processes of TiAl alloys, especially recent advances in hot working, additive manufacturing and directional solidification. Furthermore, it points out the potential application fields of TiAl alloys in the post-combustion engine era, as well as the direction for researchers and the industry. This review aims to provide a up-to-date and comprehensive introduction to TiAl alloys, offering guidance for researchers and engineers, and promoting the large production and application of TiAl alloys.
Feng et al. (Wed,) studied this question.