| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Development and Additive Manufacturing of RHEA for Extreme Environment Applications |
| Author(s) |
Ali Ozalp, Eda Aydoğan Güngör |
| On-Site Speaker (Planned) |
Ali Ozalp |
| Abstract Scope |
Refractory High Entropy Alloys are promising candidates for structural and functional applications thanks to their excellent high temperature mechanical properties, irradiation resistance, thermal stability, oxidation and corrosion resistance. In this study, Hf5Mo15Nb35Ta25Ti20 RHEA
has been developed by CALPHAD-based thermodynamic modeling, and produced by
directed energy deposition (DED) method. 10x10x10 mm cuboids have been manufactured successfully followed by single track productions to optimize the DED parameter-set. It has been found that a single-phase BCC structure having porosity less than 1% is achieved. The compression test results have indicated high room temperature and elevated temperature (800 °C) strength (~1200 MPa and ~800 MPa, respectively) with considerable ductility (~25% and ~15%, respectively). Strengthening calculations indicate that main strenghtening mechanism originates from the elastic modulus mismatch of the constituent elements and agree well with the experiments. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Entropy Alloys, |