Mechanochemical synthesis and sintering of AlCrFeNiZn high entrophy alloy Available to Purchase

The high entropy AlCrFeNiZn alloy was synthesized by high energy ball milling which is a mechanical alloying process and characterized by X-ray Diffraction [XRD]. The crystalline structure of AlCrFeNiZn high entropy alloy mainly consists of BCC structure which can be determined by the angle of peak intensities from the XRD pattern. After 22 h of milling the formation of the HEA was not complete and there existed X-ray intensity peaks corresponding to the elemental powders. Further milling of about 8 h showed an improved result with lesser number of elemental peaks with lower intensities. The 30 h milled AlCrFeNiZn alloy powder was consolidated using compaction unit at a pressure of about 375 MPa for two minutes and is sintered at about 850°C for 2 h at controlled atmosphere. This work attempts to study density, microhardness and microstructures of sintered AlCrFeNiZn high entropy alloy samples studies are done. The density of this HEA alloy is found to be 5.202 g/cm3 at atmospheric pressure and room temperature. The microhardness was found in the Vickers micro hardness scale is 132 HV which is equal to 415 MPa.