| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys II
|
| Presentation Title |
J-109: Fabrication of AlCoCrFeNi High Entropy Alloys via Binder Jetting and Direct Energy Deposition: Characterization, Microstructural Modification, and Analysis |
| Author(s) |
Olujide Oyerinde, Justin Almeida, Ioannis Mastorakos, Philip Yuya, Ajit Achuthan |
| On-Site Speaker (Planned) |
Olujide Oyerinde |
| Abstract Scope |
Additively manufactured high-entropy alloys (HEAs) are in the early stage. More studies are required on how their compositions, processing routes, and microstructural evolutions influence HEAs (mechanical) properties for various fields of applications. In this study, the equiatomic AlCoCrFeNi high entropy alloy was fabricated via two additive manufacturing routes: binder jetting (3DBJ) and direct energy deposition (DED). The response of the samples to isothermal heat treatment was investigated and compared with the as-printed samples. Their microstructural evolutions were studied with scanning electron microscopy, energy dispersive spectroscopy, and X-ray diffractometer. Nanoindentation was used to characterize their mechanical properties. The results show that the 3DBJ and DED samples respond differently, as diffusion mechanisms like grain boundary precipitation, precipitate-free zones, and widmanstatten structure were more observable in the 3DBJ samples. The 3DBJ samples also exhibit higher values of mechanical properties. This insight about AlCoCrFeNi will benefit the tools, automobile, structures, and aerospace industries. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Entropy Alloys, Phase Transformations |