On the synthesis and characterisation of novel composite-structured high-entropy alloys |
| |
| Authors: | Anil Kumar Digvijay Parganiha Jageshwar Verma Prasenjit Biswas A. Basu |
| |
| Affiliation: | 1. Department of Mechanical Engineering, Bhilai Institute of Technology, Durg, India;2. Department of Metallurgical and Materials Engineering, National Institute of Technology, Raipur, India;3. Department of Manufacturing Engineering, National Institute of Foundry &4. Forge Technology, Ranchi, India;5. Department of Metallurgical and Materials Engineering, National Institute of Technology, Raurkela, India |
| |
| Abstract: | A study of novel composite-structured CoCrFeNi3Si, CoCrFe2Ni2Si and Co2CrFeNi2Si high-entropy alloys, synthesised by vacuum arc melting, is presented. The designing criteria for the formation of such alloys were based on the enthalpy of mixing and the valence electron concentration. X-ray diffraction analysis revealed that all the alloys were composed of face-centered cubic and intermetallic phases. Scanning electron microscopy, along with elemental analysis, indicated that the face-centered cubic phase mainly contains Co, Cr, Fe and Ni, whereas, the intermetallic compound is Ni-Si rich. All the synthesised high-entropy alloys in the present investigation possess excellent compressive strength along with ductility at room temperature, suggesting significant potential application in the engineering field. Furthermore, enhanced hardness, wear resistance and corrosion resistance were achieved in all the designed high-entropy alloys. The previously given design parameters for the composite-structured high-entropy alloys are in good accord with the current research work. |
| |
| Keywords: | High-entropy alloys intermetallics arc melting crystal structure corrosion hardness corrosion resistance |
|
|
