|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||High Entropy Alloys VIII
||Designing Ductile Refractory High-entropy Alloys Guided by Natural Mixing
||Shaolou Wei, Sang Jun Kim, Yongjie Zhang, Goro Miyamoto, Tadashi Furuhara, Eun Soo Park, Cemal Cem Tasan
|On-Site Speaker (Planned)
Exhibiting the unique combination of high melting points and excellent softening resistance, refractory elements create interesting opportunities to design new high-entropy alloys (HEAs), aiming especially for superior high-temperature performances compared to conventional alloys. Yet, the search for optimal compositions have not yet been fully successful. In this regard, the intrinsic shortcomings of refractory metals such as brittleness at ambient temperature and catastrophic oxidation at elevated temperatures still remain as significant challenges. Here in this presentation, we will show that by making use of the natural thermodynamic mixing characteristics amongst refractory elements, novel body-centered cubic (BCC)-structured RHEAs can be developed. We will demonstrate two such RHEAs which exhibit unique specific strength-ductility synergy at room temperature and promising oxidation resistance at high-temperature. We will also systematically discuss the strengthening modules, the deformation micro-mechanisms, and the underlying RHEAs design principles.
||Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume