Authors:
S Venkatesh Kumaran (1,3); Sri Bala Aditya Malladi (2); Eduard Hryha (2); Jose M Torralba (1,3)
1- IMDEA Materials, Madrid, Spain
2- Chalmers University of Technology, Göteborg, Sweden
3- Universidad Carlos III de Madrid, Spain
Abstract:
Manufacturing high entropy alloys (HEAs) using powder bed fusion-laser beam/Metal (PBF-LB/M) enables their production with minimal elemental segregation due to its inherently fast cooling rates resulting in excellent properties. So far, HEAs have been fabricated with fully pre-alloyed gas-atomized powders which makes it expensive and slower to explore new alloy compositions. In this work, for the first time, instead of pre-alloying, blended powders of CoCrF75, Ni625, Invar36, and pure Al powders were used as feedstock to develop a CoCrFeNiMoxAly HEA which consists of FCC phase in the metastable state. The process was successfully optimized, achieving relative densities greater than 99.8%. This method of mixing powders for PBF-LB/M enables rapid exploration of new HEAs and this work is expected to contribute to its successful application in the future.
DOI:
https://doi.org/10.59499/EP235762606