Authors:
Srdjan Milenkovic (1,2), Angel Biedma (1,2), Yinuo Guo (3), Paula Alvaredo (2)
1- IMDEA Materials Institute, Eric Kandel 2, 28906 Getafe, Spain
2- Universidad Carlos III de Madrid, Av. de la Universidad, 30, 28911 Leganés, Madrid,Spain
3- Universidad Politecnica de Madrid, Calle del Prof. Aranguren, 3, 28040 Madrid,Spain
Abstract:
The processing method influences the microstructure and therefore, properties of High Entropy Alloys (HEA). In this work, two eutectic high entropy alloys (EHEA) were processed by two different processing methods: arc casting (AC) and powder metallurgical (PM) route comprising powders gas atomization and their consolidation by field-assisted sintering (FAST). The obtained microstructures and properties are compared in order to establish the influence of the processing route on the microstructure of eutectic alloys and the relationship between microstructure, properties, and solidification rate has been established. The processed EHEA were AlCoCrFeNi2.1 and CrFeNi2.2Al0.8. The AlCoCrFeNi2.1 was the first proposed EHEA, which has been thoroughly studied. The CrFeNi2.2Al0.8 EHEA was derived from AlCoCrFeNi2.1 by removing the Co element. Results show that the alloys prepared by the PM possess finer microstructure and higher hardness. The Co-free CrFeNi2.2Al0.8 alloy and AlCoCrFeNi2.1 alloy have similar properties at room temperature when processed by the same method.
Introduction
DOI:
https://doi.org/10.59499/EP235785696