Additive manufactured new hybrid high entropy alloys derived from the AlCoFeNiSmTiVZr system

Several million high entropy alloys (HEAs) are possible just using the combination of ∼37 main elements. However, the HEA count in the literature hardly exceeds 450. Hence, a great need and opportunity exist with an objective of producing robust and durable alloys. Though various equiatomic HEAs have been explored, efforts in the direction of the utility of lanthanides/rare earth elements and refractory elements with the combination of 3d transition metals and aluminum have not been well-established. In order to further explore such alloys, several new hybrid HEAs namely AlCoFeNiV0.9Sm0.1, AlCoFeNiSm0.1TiV0.9, AlCoFeNiSm0.05TiV0.95Zr, and a bulk metallic glass AlCoFeNiTiVZr were manufactured using the selective laser melting technique. Most of these alloys are single phase FCC (face-centered cubic) structures as revealed by X-Ray diffraction analysis and other characterization techniques. These alloys exhibit excellent mechanical and corrosion resistant properties as revealed by first principles based calculations and experimental examinations.