| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in the State-of-the-Art of High Temperature Alloys
|
| Presentation Title |
High Temperature Oxidation Behavior of (CoCrNi)100-xCx Medium Entropy Alloy Fabricated by Laser Powder Bed Fusion |
| Author(s) |
Soobin Kim, So-Yeon Park, Kee-Ahn Lee |
| On-Site Speaker (Planned) |
Soobin Kim |
| Abstract Scope |
CoCrNi medium entropy alloys have attracted the attention of researchers due to their exceptional high-temperature oxidation resistance and mechanical properties. In this study, the oxidation behavior of 0.25C MEA and 0.75C MEA, which were designed to exhibit improved mechanical properties by controlling in-situ precipitates via a laser powder bed fusion (L-PBF) process, was investigated. High-temperature oxidation tests were conducted for 24 hours at various temperatures (900°C, 1000°C, 1100°C) and in an atmosphere similar to the atmosphere (79% N2+21% O2). The oxidation weight change of 0.25C MEA increased by 0.052, 0.362, and 0.852 mg/cm2 at each temperature, while that of 0.75C MEA increased by 0.256, 0.579, and 1.148 mg/cm2. Observation of oxidation profiles determined that carbide formation and growth influenced internal oxidation behavior. Based on the above results, the high-temperature oxidation mechanism of CoCrNi MEAs manufactured by the L-PBF process was discussed, as well as the way to improve oxidation resistance. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Entropy Alloys, High-Temperature Materials |