| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Steels in Extreme Environments
|
| Presentation Title |
Material Degradation of Engineering Alloys under High Temperature Ammonia Environment in Power Generation and Hydrogen Generation Processes |
| Author(s) |
Yani Zhang, Jun Yeong Jo, Hwasung Yeom |
| On-Site Speaker (Planned) |
Yani Zhang |
| Abstract Scope |
The mass industrial production and transportation of hydrogen and power generation using ammonia become extremely valuable and crucial to human life for the carbon neutral society. However, during the ammonia cracking and combustion processes, ammonia is typically elevated to high temperatures (ranging from 600 °C to 1000 °C) to decompose. Engineering alloys, such as various austenitic, ferritic stainless steels, and high-Nickel alloys, experience different levels of surface degradation under these harsh conditions. This results in changes to the material's metallurgical characteristics, which further affects the material’s performance and lifetime. This study presents a general overview of experimental data reporting the degradation modes of the engineering alloys under high temperature ammonia environments. The effects on physical (i.e., phase evolution and nitrogen diffusion), chemical (i.e., nitriding), and mechanical properties (i.e., hardness, tensile properties) of the materials are discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Environmental Effects, Iron and Steel |