Bulk Multi-Principal Element Alloys (MPEAs) are generally synthesized by casting, a process needing specific equipment. Here, a standard laboratory electric furnace was used to synthesize bulk CoCrFeNi by melting of prealloyed powders followed by natural cooling. The use of prealloyed powders guaranteed atomic-level mixing. In accordance with the literature, the resulting ingot had a face-centered cubic structure. A typical dendritic-interdendritic microstructure was obtained which was explained by partitioning during solidification and grain boundary wetting phenomenon. Post-annealing treatment improved chemical homogeneity without crystallographic phase change. This work shows the feasibility of melt-aided synthesis of CoCrFeNi HEA under static conditions using a conventional laboratory furnace.
In-house synthesis of CoCrFeNi ingots using an electric furnace / Colombini, E.; Lassinantti Gualtieri, M.; Mortalo, C.; Deambrosis, S. M.; Veronesi, P.. - In: MATERIALS LETTERS. - ISSN 0167-577X. - 323:(2022), pp. 132571-132571. [10.1016/j.matlet.2022.132571]