| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Late News Poster Session
|
| Presentation Title |
Enhanced High-temperature Elongation of Ni-based Superalloys by Reducing Co and Increasing Mo |
| Author(s) |
Saurabh Tiwari, Jae Hoon An, Muhammad Ishtiaq, Hyoju Bae, Jae Bok Seol |
| On-Site Speaker (Planned) |
Saurabh Tiwari |
| Abstract Scope |
Ni-based superalloys are preferentially used for temperatures above ~600oC owing to their unique creep strength and stability against harsh environments which is standard criteria to ensure the efficient and safe application of used material. However, the addition of Re enhances the creep resistance but increases the overall cost also. The development of Re-free IN738LC, low-carbon alloys specifically for harsh environments reduced the overall cost. Still, the presence of other expensive elements as Co increases its cost. Here, we reduce the amount of Co (wt%) by ~50% and achieve the overall mechanical properties with increased elongation (~30%) at an elevated temperature of 750oC. This is achieved by reducing Co content and increasing the relatively cheaper Mo content. The annealed and deformed microstructure analyzed by SEM, EBSD, and ECCI reveals the change in the slip mechanism plays a significant role in enhancing the mechanical properties of Mo-modified IN738LC alloy. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
High-Temperature Materials, Characterization, Mechanical Properties |