| Abstract Scope |
Refractory alloys, like TZM (0.5wt%Ti-0.08wt%Zr-Mo), are well-suited for radiation environments due to their high temperature strength and structural stability. During brazing, however, TZM is susceptible to surface oxidation, liquid metal embrittlement (LME), and intermetallic phase formation at the joint, leading to detrimental effects on the mechanical properties at the joint. To prevent LME in refractory alloys, nickel (Ni) additions in braze fillers have proven effective; yet conflicting studies report the presence of Ni may increase susceptibility of the base material to LME. Therefore, we investigate the role of Ni in Au-based braze fillers on the joint quality between TZM and 304 stainless steel (SS), where the joint quality will be evaluated via lap shear testing, SEM/EDS, and XRD. This work provides insight into the manufacturing and process development for refractory alloys used in extreme environments. Prepared by LLNL under Contract DE-AC52-07NA27344, Release # LLNL-ABS-2007749 |