About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fundamentals of Sustainable Metallurgy and Processing of Materials
|
| Presentation Title |
Effect of recycling using CaO crucibles on the oxidation resistance at different temperatures for Ni-base single-crystal superalloy PWA1484 |
| Author(s) |
Chihiro Tabata, Satoshi Utada, Toshio Osada, Kyoko Kawagishi |
| On-Site Speaker (Planned) |
Chihiro Tabata |
| Abstract Scope |
Ni-base superalloys exhibit excellent mechanical and environmental properties at high temperatures, due to the usage of rare metals. To reuse the alloys and reduce the material cost, direct recycling of Ni-base superalloys was conducted. This study focuses on the oxidation properties of recycled Ni-based single-crystal superalloy PWA1484, where the effects of the recycling process will be discussed. The differences in the oxidation rate and adhesion of the oxide layers were compared between samples oxidized at 800℃ and 1100℃. Materials that were desulfurized by melting in CaO crucibles showed higher oxidation resistance at both temperatures compared to the alloys melted in Al2O3 crucibles, regardless of the material’s origin. In addition, clear differences in oxidation resistance were observed in different oxidation temperatures for the sample counter-alloyed and recycled using Al2O3 crucibles. The effect of the composition of the alloys, such as impurity S, will be discussed as well. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Environmental Effects, Recycling and Secondary Recovery |