| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Entropy Alloys IX: Alloy Development and Properties
|
| Presentation Title |
Accelerated Alloy Development and Characterization of Compositionally Complex Alloys via High-throughput Methods |
| Author(s) |
Phalgun Nelaturu, Michael Moorehead, Thien Duong, Michael Niezgoda, Adrien Couet, Kumar Sridharan, Santanu Chaudhuri, Dan J. Thoma |
| On-Site Speaker (Planned) |
Phalgun Nelaturu |
| Abstract Scope |
Additive manufacturing via directed energy deposition was used as a high-throughput technique to synthesize compositionally complex alloys in the Cr-Fe-Mn-Ni quaternary system. In situ alloying by controlled flow of four elemental powder hoppers permitted more than 100 bulk samples with different compositions to be synthesized within a week. Compositional control to within ±5 at% was achieved. Re-melting passes between each printing layer reduced the area fraction of unmelted powder in the build to <0.2%. The alloys were heat treated in a high-throughput fashion (50 alloys at a time) which involved homogenization at 1000 °C for 24 hours, followed by aging at 700 °C for 24 hours. The alloys were characterized by automated EDS and XRD, SEM imaging, and microhardness. The experimental results were coupled with CALPHAD modeling to expand the thermodynamic databases and build a physics-based model that could predict the hardness of these alloys based only on the composition. |
| Proceedings Inclusion? |
Planned: |