|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||High Entropy Alloys VIII
||J-88: Ductility of Quaternary Refractory Medium Entropy Alloys with Body-centered Cubic Structure
||Qian He, Shuhei Yoshida, Tilak Bhattacharjee, Nobuhiro Tsuji
|On-Site Speaker (Planned)
The present work focuses on the effect of homogenization on the ductility in HfNbTaTi, HfNbTaZr, HfNbTiZr, HfTaTiZr and NbTaTiZr refractory medium entropy alloys (MEAs). As-cast ingots of the MEAs were fabricated by vacuum arc-melting of pure metals and casting into a water-cooled copper mold under protective Ar atmosphere. Homogenization was then carried out to eliminate the elemental segregation in the as-cast samples. The results of tensile tests at room temperature indicated that although yield strength slightly decreased after homogenization, ductility greatly improved in HfNbTaTi, HfNbTaZr, HfNbTiZr, HfTaTiZr and NbTaTiZr MEAs. This suggested that segregation could heavily deteriorate the mechanical properties of MEAs, particularly the ductility. Besides, these results clearly showed that not only HfNbTaTiZr high entropy alloy (HEA) but also some equi-atomic quaternary MEAs exhibited ductile deformation behavior.
||Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume