Nickel based superalloy braze filler

A method for welding nickel based superalloy components, comprising:

• providing a nickel based superalloy substrate;
• selecting a surface on any region of the nickel based superalloy substrate,
• applying a ductile weld filler that is weldable at room temperature to the surface of the nickel based superalloy substrate, the weld filler having a closely matched coefficient of thermal expansion to the surface of the nickel based superalloy substrate;
• applying heat to melt the weld filler to form molten weld filler;
• welding the nickel based superalloy substrate with the weld filler at ambient temperature;
• resolidifying the molten weld filler to form a solidified joint material without the formation of cracks without a heat treatment during the method for welding nickel based superalloy components,
• wherein the ductile weld filler comprises,
• 11.2 wt %-15.6 wt % chromium;
• 9.6 wt %-11.4 wt % cobalt;
• 2.4 wt %-5.0 wt % molybdenum;
• 4.4 wt %-7.5 wt % tungsten;
• 1.4 wt %-2.6 wt % tantalum;
• 3.0 wt %-4.8 wt % aluminum;
• 0.4 wt % to 1.0 wt % titanium;
• at most 0.15 wt % iron;
• at most 0.1 wt % manganese;
• at most 0.04 wt % silicon;
• 0.07-0.08 wt % carbon;
• at most 0.015 wt % boron;
• 0.005-0.02 wt % zirconium;
• 0.5-1.4 wt % hafnium;
• at most 0.1 wt % vanadium;
• and
• remainder nickel.