Properties and Processing Technologies of High-entropy Alloys

Abstract High-entropy alloys (HEAs) are emerging materials that are developed based on entropy and draw significant attention for designing their chemical disorders to bring different structural and physical characteristics. Over the past two decades, significant salient efforts have been conducted to explore many unique and useful properties of HEAs, such as overcoming the strength-ductile trade off, outstanding thermal stability, and excellent low temperature plasticity. Here, we review the key research topic of HEAs from the following three aspects: (i) performance advantages and composition design, (ii) performance-driven HEAs and (iii) fabrication process-driven HEAs. Towards their industrial applications, our article reviews a large range of methods to synthesis, fabricate and process HEAs. We also discuss the current challenges and future opportunities, mainly focusing on performance breakthroughs in HEAs.