|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Innovations in High Entropy Alloys and Bulk Metallic Glasses: An SMD & FMD Symposium in Honor of Peter K. Liaw
||High Entropy Alloys as Filler Metals
||Zhenzhen Yu, Benjamin Schneiderman, Abdelrahman Abdelmotagaly, Chihpin Andrew Chuang, Jianxun Hu
|On-Site Speaker (Planned)
High entropy alloys have a vast compositional space available. Their tendency to form entropy-stabilized, simple solid solution phases, and to exhibit composition-dependent sluggish diffusion characteristics, make them potential candidates as filler metals for similar and dissimilar welding and joining. Meanwhile, the complex deformation mechanisms in HEAs with a primary FCC phase enable abundant strain hardening, which could accommodate the thermally induced stress during welding. One application example is brazing of Ni-base superalloys. A new HEA filler, Mn35Fe5(CoNiCu)20, was designed and the microstructural evolution during brazing was systematically investigated by ex-situ and in-situ characterizations and kinetic analysis. An optimal shear strength comparable to that of the Alloy 600 substrate was achieved in the braze joints. Another application example is the design of HEA filler for resistance spot welding of galvannealed advanced high strength steels to mitigate the liquid metal embrittlement issue caused by expulsed liquid zinc at the joint interface.
||Planned: Supplemental Proceedings volume