Synthesis and Air Jet Erosion Study of AlXFe1.5CrMnNi0.5 (x = 0.3, 0.5) High-Entropy Alloys

• Published in: Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2018-11, Vol.49 (11), p.5607-5618
• Main Authors: Kumar, Saurav, Kumar, Devesh, Maulik, Ornov, Pradhan, Ajaya Kumar, Kumar, Vinod, Patniak, Amar
• Format: Article
• Language: English
• Subjects: Air jets; Aluminum; Body centered cubic lattice; Characterization and Evaluation of Materials; Chemistry and Materials Science; Densification; Diffraction patterns; Electron diffraction; Erosion; Face centered cubic lattice; High entropy alloys; Impingement; Materials Science; Mechanical alloying; Metallic Materials; Microscopy; Microstructure; Morphology; Nanotechnology; Phase transitions; Scanning electron microscopy; Sintering (powder metallurgy); Solid solutions; Structural Materials; Surfaces and Interfaces; Thin Films; Transmission electron microscopy
• ISSN: 1073-5623; 1543-1940
• DOI: 10.1007/s11661-018-4894-7

The aim of the present study was to synthesize Al X Fe 1.5 CrMnNi 0.5 ( x = 0.3, 0.5) high-entropy alloys by mechanical alloying followed by conventional sintering. Phase analysis was investigated using X-ray diffractometry, and transmission electron microscopy. The particle morphology and composition were investigated using scanning electron microscopy and energy-dispersive spectroscopy, respectively. Thermodynamic parameters were calculated and analyzed to explain the formation of a solid solution. XRD analysis revealed that the major and the minor phases in Al X Fe 1.5 CrMnNi 0.5 ( x = 0.3, 0.5) high-entropy alloys are of BCC and FCC structure, respectively. Analysis of selected area electron diffraction pattern of powder Al X Fe 1.5 CrMnNi 0.5 ( x = 0.3, 0.5) HEAs concurred with the XRD results. Microstructural features and mechanism for solid solution formation have been conferred in detail. Differential scanning calorimetric analysis of these alloys confirmed that substantial phase change occurs at a temperature of 935.12 °C in case of Al 0.3 Fe 1.5 CrMnNi 0.5 HEA. The effect of aluminum content and different sintering atmosphere on phase evolution, hardness, density, and air jet erosion property are investigated. The air jet erosion study of the sintered alloys was investigated at 90, 75, 60, and 45 deg angle of impingement.