Fatigue Strength of Brazed Joints at Room and Elevated Temperature

We investigated the rotary bending fatigue strength of butt brazed naval brass specimens with Ag-P-Cu and Ag-Cu-Cd-Zn series filler metals.Specimens are brazed by induction heating, and are tested at room temperature and 250°C.Test results are summarized as follows :1) Fatigue strength of brazed joints and base metal are as follows, at room temperature, Ag-P-Cu series ; 9.0 kg/mm2Ag-Cu-Cd-Zn series ; 11.0/ kg/mm2base metal ; 18.2 kg/mm2at 250°C, Ag-P-Cu series ; 7.5 kg/mm2Ag-Cu-Cd-Zn series ; 8.0 kg/mm2base metal ; 15.5 kg/mm22) Fatigue strength of brazed joints are influenced by the impact strength of filler metals and the hardness distribution of filler metal, boundary layer and base metal at brazed joints.