Microstructure and Adjustment in Tensile Strength of Al0.8CoCrFeNi

Abstract

The notion of high entropy alloys is a significant new change in alloys design, as they emphasize compositions that are close to the center of a multicomponent phase diagram, in contrast to conventional alloys that are controlled by one basic element. The high entropy alloys can potentially stack solid-solution phases with respect to intermetallic compounds and can give rise to interesting properties such as superior hardness, notable toughness, superior fracture toughness and corrosion resistance [1][2] As potentially remarkable engineering alloys, the AlCoCrFeNi HEA system has stimulated considerable research activities because it possesses a series of attractive physical, chemical and mechanical qualities [3]. The objective of this research is the assessment of the microstructure progression and tuning of the mechanical properties of l0.8CoCrFeNi fibers produced by cutting followed by annealing at 1100 °C. By thermomechanical treatment and microstructure monitoring, equilibrated tensile properties were obtained at room temperature. In comparison to the bulk as-cast alloy, the heat-treated fibers exhibit an elongation significantly major [4]. The disadvantage in improving the ductility of the fibers was a decrease in yield strength and fracture toughness.