A Review of the Latest Developments in the Field of Refractory High-Entropy Alloys

Crystals

A.Raja Annamalai¹  Muthe Srikanth¹  Chun-Ping Jen²  A. Muthuchamy³ 

[1] Centre for Innovative Manufacturing Research, VIT, Vellore 632 014, Tamil Nadu, India;Department of Mechanical Engineering and Advanced Institute of Manufacturing for High-Tech Innovations, National Chung Cheng University, Chia-Yi 62102, Taiwan;Department of Metallurgical and Materials Engineering, National Institute of Technology Tiruchirappalli, Tiruchirappalli 620015, Tamil Nadu, India;

关键词: refectory high-entropy alloys (RHEAs);    powder metallurgy;    casting;    thin film;    coatings;    mechanical properties;   

DOI  :  10.3390/cryst11060612

来源: DOAJ

【 摘 要 】

This review paper provides insight into current developments in refractory high-entropy alloys (RHEAs) based on previous and currently available literature. High-temperature strength, high-temperature oxidation resistance, and corrosion resistance properties make RHEAs unique and stand out from other materials. RHEAs mainly contain refractory elements like W, Ta, Mo, Zr, Hf, V, and Nb (each in the 5–35 at% range), and some low melting elements like Al and Cr at less than 5 at%, which were already developed and in use for the past two decades. These alloys show promise in replacing Ni-based superalloys. In this paper, various manufacturing processes like casting, powder metallurgy, metal forming, thin-film, and coating, as well as the effect of different alloying elements on the microstructure, phase formation, mechanical properties and strengthening mechanism, oxidation resistance, and corrosion resistance, of RHEAs are reviewed.

【 授权许可】

Unknown