About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Surface Engineering V
|
Presentation Title |
Nitriding-Assisted Surface Enhancement of Multi-Principal Element Alloys Containing Refractory Metals |
Author(s) |
Yu-Hsuan Lin, David Poerschke |
On-Site Speaker (Planned) |
Yu-Hsuan Lin |
Abstract Scope |
Multi-principal elements alloys (MPEAs) consisting of refractory metals can retain high yield strength to elevated temperatures, making them attractive for high temperature applications. Surface modification processes can be used to improve their surface hardness, and wear and corrosion resistance. However, there are few studies on nitriding processes for alloys containing refractory metals. This work focuses on understanding the competition for nitrogen reaction between the nitride-forming refractory metals in different MPEA systems, and how it influences the chemistry and the microstructures of the nitrided zones. Refractory alloys comprising single BCC solid solution or dual-phase BCC and ordered B2 phase, and with varying fractions of 3d transition metals were prepared by arc melting, annealing, and then processed by gas nitriding. Characterization of the nitride layer growth, diffusion zone thickness, and internal nitridation provides insight to help navigate the vast design space of MPEAs and develop surface enhancement strategies in the future. |
Proceedings Inclusion? |
Planned: |
Keywords |
Surface Modification and Coatings, High-Entropy Alloys, High-Temperature Materials |