About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Lightweight Composites, Materials & Alloys
|
| Presentation Title |
Tailoring of Microstructure Through Heat-treatment for Enhanced Mechanical Properties in Nb-rich γ-TiAl Alloy |
| Author(s) |
Raashid Firoz, Rahul Mitra |
| On-Site Speaker (Planned) |
Raashid Firoz |
| Abstract Scope |
The Nb-rich γ-TiAl alloys exhibit a significant potential for enhancing the aero-engine efficiency owing to their notably lower density. To comprehensively examine the impact of various annealing conditions on the microstructure, the cast Ti-45Al-8Nb-0.2B alloy was subjected to diverse annealing treatments. Subsequently, multi-scale hardness tests were conducted to gain approximate insight into the mechanical performance of the different annealed samples. The current findings underscore the dominant role of the α2 phase fraction in increasing hardness, followed by the influence of finer lamellar spacing. It has been found that a higher annealing temperature in the α phase field (1380°C), a short annealing time (around 2 hours), and rapid cooling yield the optimal microstructure with higher α2 content and ultra-fine lamellar spacing. This ongoing investigation has identified the optimal microstructure and annealing treatment necessary to achieve superior mechanical properties, particularly enhanced creep resistance, which will be discussed. |