Abstract Scope |
GRCop42- Inconel 625 joints have garnered increased attention in recent years due to the high thermal conductivity of the former and high temperature tensile strength of the latter. Such joints, however, suffer from cracking when joined via liquid state processes. In this presentation, mixtures of 15, 30, 50, 70, 75, and 85 wt.% GRCop42 are mixed with Inconel 625 via arc melting and characterized with the goal of unraveling the composition-structure relationship. The results indicate that a liquid miscibility gap exists between a Cu deprived and Cu rich liquid in compositions greater than 20 wt.% GRCop42. For the 30 and 50 wt.% GRCop42 samples, Cu-rich liquid entrapment occurs within the Cu-deprived solid, leading to cracking. For the 70, 75, and 85 wt.% GRCop42 samples, the Cu deprived liquid consolidates and forms a brittle Mo-Nb phase which leads to cracking. The Cu deprived liquid also traps gas, leading to porosity. |