Effects of Nickel on the Microstructure, Mechanical properties and Corrosion Resistance of CoCrFeNixAl0.15Ti0.1 High Entropy Alloy

The present work investigates the effect of Ni on microstructure, mechanical properties, and corrosion resistance CoCrFeNixAl0.15Ti0.1 high-entropy alloys. It was found that appropriate addition element in alloy is beneficial to reduce average grain size alloy. yield strength tensile under fine-grain strengthening have also been increased, while ductility system this study has not significantly affected. In terms resistance, alloys form a dense passive film at open circuit potential, possessing good resistance. However, with excessive content alloy, pitting environment chloride ions will decrease due relative Cr element. This can provide guidances for design development new precipitation-strengthened CoCrFeNi-based excellent comprehensive properties.