Spark Plasma Sintering Route Design for Sustainable Fabrication of Corrosion-Resistant BCC Al15Cr15Fe30Ni30Mn10 Components

Material failure due to corrosion has adverse impacts on the economy and, if unattended, usually results in disastrous, unwanted events. Owing to this, the current materials used in aggressive environments depend on protective coatings to prevent degradation. An emerging group of alloys named ‘High entropy alloys’ (HEAs) has been proposed as a suitable material for this application and there is limited research on the performance of these alloys under aggressive conditions. In this work, Al ₁₅ Cr ₁₅ Fe ₃₀ Ni ₃₀ Mn ₁₀ HEA is synthesized via spark plasma sintering (SPS), and the influence of sintering parameters on microhardness, densification, and corrosion behavior is investigated. The attained results showed that the microhardness obtained from the sintered sample was slightly higher than that of stainless steel and Ti64 traditional alloys currently used in corrosive environments. It was also observed that sintering parameters had a huge effect on the evolving microstructure and corrosion attributes and the findings are fully discussed in this paper.