|About this Abstract
||1st World Congress on High Entropy Alloys (HEA 2019)
||High Entropy Alloys 2019
||Improving Ductility of Dual-phase High-entropy Alloys for High-temperature Structural Applications
||Young-Sang Na, Ka-Ram Lim, Hyun-Jun Kwon, Jong-Woo Won
|On-Site Speaker (Planned)
The untapped potential of high-entropy alloys (HEAs) has attracted considerable interest in recent years. HEAs are expected to offer a new route to form highly stable and simple solid solution structures (as compared to intermetallic compounds) in multicomponent alloys, and they also have considerable potential in the extreme conditions such as cryogenic temperatures, high temperatures and corrosive environments. Among many HEAs, AlCoCrFeNi alloy shows outstanding specific strength over the temperature range of 400 - 600˚C, since it has dual-phase structure (A2+B2) and high coherency between the two phases. However, its ductility is very poor even at high temperatures. To enhance ductility, we have controlled the volume fraction and the chemical composition of each phase by combining experimental and computational approaches. In the present study, mechanical properties of newly developed alloys have been examined from a microstructural point of view.