About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
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Additive Manufacturing, Directed Energy Deposition of Metals: Processing – Microstructure – Mechanical Property Relationships
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| Presentation Title |
Microstructural Differences in AlCoCrFeNi High-Entropy Alloys from Binder Jetting and Directed Energy Deposition |
| Author(s) |
Jide Oyerinde, Ioannis N. Mastorakos, Ajit Achuthan, Philip Yuya |
| On-Site Speaker (Planned) |
Ioannis N. Mastorakos |
| Abstract Scope |
Equiatomic AlCoCrFeNi high-entropy alloys were fabricated via two additive manufacturing (AM) routes: binder jetting (BJ) and directed energy deposition (DED). The response of the samples from both routes to isothermal heat treatment was investigated and compared with their as-printed samples. Distinct differences in the microstructural evolutions were captured with scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), X-ray diffractometer (XRD), and backscattered electron diffraction (EBSD). The effect of the characteristic features and phenomena on micro-mechanical properties was studied using nanoindentation. The binder jetting and DED samples respond differently to isothermal heat treatments, as diffusion mechanisms like grain boundary precipitation, precipitate-free zones (PFZs), and Widmanstatten structures are observable in the binder jetting samples. The study provides insights into the microstructural morphology, diffusion phenomena, and evolution of the alloys manufactured via the two AM routes. It can help improve the properties and fabrication of AlCoCrFeNi HEA for various applications. |