|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advances in Multi-Principal Elements Alloys X
||Multi-Principal Elements Alloys as Filler Metals for Similar and Dissimilar Joining Applications
||Zhenzhen Yu, Benjamin Schneiderman, Abdelrahman M.M. Abdelmotagaly, Andrew Chipin Chuang
|On-Site Speaker (Planned)
Multi-principal elements alloys (MPEA) 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 joining. One application example is brazing of Ni-base superalloys. A new filler, MnFeCoNiCu, was designed using a high-throughput computational methodology. The microstructural evolution during brazing was systematically investigated by ex-situ and in-situ characterizations and kinetic analysis. It was found out that Cu and Mn segregation into interdendritic region served to increase lattice parameter disparity between dendritic and interdendritic regions during early stage of solidification. Solid-state interdiffusion facilitated composition homogenization during cooling. Exceptional mechanical properties have been demonstrated in the brazed joints in comparison to these made with conventional fillers. Additional examples will be shown to demonstrate the effectiveness of MPEA fillers designed for weld defect control and dissimilar materials joining.
||High-Entropy Alloys, Joining, Solidification