FeSiBAlNiMo high entropy alloy prepared by mechanical alloying

Abstract

High-entropy alloys have attracted increasing attentions because of their unique compositions, microstructures, and adjustable mechanical and functional properties. In this work, mechanical and magnetic properties of the FeSiBAlNiMo high-entropy alloy were studied in heat-treated conditions. Influence of temperature and time of sintering was investigated. The lowest coercivity Hc = 370 A/m was reached at sintering temperature 580 °C, during 20 min in Ar/10H2 atmosphere. Resistivity decreases from R = 0:006 cm at 580 °C of sintering temperature to R = 0:0004 cm at temperature 1100 °C. Transverse rupture strength TRS = 340 MPa as well as the Young modulus E = 87 GPa were much higher in the case of sintering at 1100 °C in comparison to TRS = 5 MPa and E = 7:5 GPa at sintering temperature 580 °C. Low temperature consolidation made possible to structure recovery and stress relief of amorphous-nanocrystalline structure. Higher temperature above 1100 °C induced sintering processes and formation of complex borides.