Research progress of high-entropy amorphous materials and their additive manufacturing technology

High-entropy amorphous alloys (HEAAs) exhibit unique physical, chemical and mechanical properties as well as better thermal stability. Thus, its fabrication technology has become one of the important research hotspots at home and abroad. However, high-entropy amorphous materials manufactured by traditional technology had defects such as coarse crystal grains and material waste, which was difficult to meet the needs of processing production. The precise manufacturing and rapid cooling of additive manufacturing technology could solve the problems, and produce high entropy amorphous alloys with superior properties. This review research briefly introduced the research system and common preparation methods of high-entropy amorphous materials. It mainly focused on the research about fracture strength, corrosion resistance and thermal stability of high-entropy amorphous materials. The process features and advantages of additive manufacturing technology, and the scientific difficulties for applying this technology to fabricate high-entropy amorphous alloys were summarized. The results showed that additive manufacturing technology contributed to high-entropy amorphous materials with dense and uniform microstructures, while the explanation for the formation of amorphous phases was limited to the four effects of high-entropy alloys, Finally, a discussion with two additive manufacturing methods commonly used in the fabrication of high-entropy amorphous materials in recent years was made. Furthermore, the prospects for the development trend of fabricating high-entropy amorphous materials by additive manufacturing technology were put forward.