First-principles and Experimental Study on Structure and Properties of Fe20Co20Cr20Ni25AlxTi(15-x) High Entropy Alloy Coatings
DOI:
https://doi.org/10.54097/9jw5m841Keywords:
Laser cladding; Frist-principles; Micro-shearing; Tensile testing at room temperature.Abstract
In this study, based on DFT-based first-principles calculations and the design philosophy of multi-component alloy segmented design, a high-entropy alloy system of Fe20Co20Cr20Ni25AlxTi(15-x) (x = 0, 5, 10, 15) was designed to investigate the synergistic effects of Al and Ti on phase stability, electronic properties, and elastic properties. The designed Fe20Co20Cr20Ni25AlxTi(15-x) high-entropy alloy exhibits good stability; there are no significant differences in the band density among the various high-entropy alloys, and all exhibit metallic properties. The addition of Al and Ti did not compromise the stability of the high-entropy alloy system. Under optimal conditions, defect-free, well-formed high-entropy alloy coatings were successfully prepared. Under optimal conditions, defect-free, well-formed high-entropy alloy coatings were successfully prepared. The basic mechanical properties of the high-entropy alloy coatings were investigated, resulting in a Fe20Co20Cr20Ni25Al5Ti10 high-entropy alloy coating with excellent mechanical properties.
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