High-Pressure Torsion for Synthesis of High-Entropy Alloys

Abstract

High-pressure torsion (HPT) is widely used not only as a severe plastic deformation (SPD) method to produce ultrafine-grained metals but also as a mechanical alloying technique to synthesize different alloys. In recent years, there have been several attempts to synthesize functional high-entropy alloys using the HPT method. In this paper, the application of HPT to synthesize high-entropy materials including metallic alloys, hydrides, oxides and oxynitrides for enhanced mechanical and hydrogen storage properties, photocatalytic hydrogen production and high light absorbance is reviewed.

Keywords

• high-entropy alloys (HEAs)
• high-entropy ceramics
• high-entropy oxides
• high-entropy oxynitrides
• severe plastic deformation (SPD)
• high-pressure torsion (HPT)