| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
A 3D Printable Refractory High Entropy Alloy with Excellent Mechanical Properties |
| Author(s) |
Advika Chesetti, Sucharita Banerjee, Mohan Sai Kiran Kumar Yadav Nartu, Sriswaroop Dasari, Abhishek Sharma, Rajarshi Banerjee |
| On-Site Speaker (Planned) |
Advika Chesetti |
| Abstract Scope |
Attaining microstructural homogeneity has been a challenge in conventionally manufactured refractory alloys despite high temperature annealing treatments. The current study shows that substantially higher cooling rates in additive manufacturing (AM) processes can overcome this challenge. A low density refractory high entropy alloy (RHEA) of the composition Al10Nb15Ta5Ti30Zr40 (at.%) was successfully fabricated using the laser powder bed fusion technique from pre-alloyed powders. The conventionally cast alloy exhibited a substantially higher degree of compositional segregation as compared to the AM processed alloy. The AM processed RHEA exhibits a nanoscale co-continuous mixture of BCC and B2 phases, with an excellent room temperature compressive yield strength of ~1400MPa and ~47% plasticity as opposed to the yield strength of ~1075MPa, and ~55% plasticity, reported for the conventionally cast condition. These exceptional mechanical properties were achieved without additional annealing treatments indicating that this AM processed RHEA can be fabricated in near-net form while retaining these properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Characterization, Additive Manufacturing |