Abstract: A weld filler is proposed which significantly improves the weldability of some nickel-based superalloys and includes the following constituents (in wt %): 11.2%-15.6% chromium (Cr), 9.6%-11.4% cobalt (Co) 2.4%-5.0%, molybdenum (Mo) 0.1%-3.3%, 4.4%-7.5% tungsten (W), 1.4%-2.6% tantalum (Ta), 3.0%-4.8% aluminum (Al), 0.4-1.0% titanium (Ti), 0.07%-0.08% carbon (C), 0.5%-1.4% hafnium (Hf), trace elements, and remainder nickel. A method is also provided. The method includes providing a nickel-based substrate to weld, applying a ductile weld filler having a closely matched coefficient of thermal expansion to a surface of the substrate, applying heat to melt the weld filler to form molten weld filler, welding the substrate with the weld filler at ambient temperature, and resolidifying the molten weld filler to form a solidified joint material.

Abstract: A weld filler is proposed which significantly improves the weldability of some nickel-based superalloys and includes the following constituents (in wt %): 14.6%-15.6% chromium (Cr), 10.4%-11.4% cobalt (Co) 4.6%-5.0%, molybdenum (Mo), 4.4%-5.2% tungsten (W), 1.4%-1.8% tantalum (Ta), 3.0%-3.7% aluminum (Al), 0.7-1.3% titanium (Ti), 0.14%-0.16% carbon (C), 0.0425-0.0575% zirconium, 0.7%-1.2% hafnium (Hf), at most 0.15% iron, at most 0.1% manganese, at most 0.1% silicon, at most 0.1% vanadium, at most 0.015% boron, trace elements, and remainder nickel.

Abstract: A weld filler is proposed which significantly improves the weldability of some nickel-based superalloys and includes the following constituents (in wt %): 11.2%-15.6% chromium (Cr), 9.6%-11.4% cobalt (Co) 2.4%-5.0%, molybdenum (Mo) 0.1%-3.3%, 4.4%-7.5% tungsten (W), 1.4%-2.6% tantalum (Ta), 3.0%-4.8% aluminum (Al), 0.4-1.0% titanium (Ti), 0.07%-0.08% carbon (C), 0.5%-1.4% hafnium (Hf), trace elements, and remainder nickel. A method is also provided. The method includes providing a nickel-based substrate to weld, applying a ductile weld filler having a closely matched coefficient of thermal expansion to a surface of the substrate, applying heat to melt the weld filler to form molten weld filler, welding the substrate with the weld filler at ambient temperature, and resolidifying the molten weld filler to form a solidified joint material.

Abstract: A weld filler is proposed which significantly improves the weldability of some nickel-based superalloys and includes the following constituents (in wt %): 14.6%-15.6% chromium (Cr), 10.4%-11.4% cobalt (Co) 4.6%-5.0%, molybdenum (Mo), 4.4%-5.2% tungsten (W), 1.4%-1.8% tantalum (Ta), 3.0%-3.7% aluminum (Al), 0.7-1.3% titanium (Ti), 0.14%-0.16% carbon (C), 0.0425-0.0575% zirconium, 0.7%-1.2% hafnium (Hf), at most 0.15% iron, at most 0.1% manganese, at most 0.1% silicon, at most 0.1% vanadium, at most 0.015% boron, trace elements, and remainder nickel.

Abstract: A weld process cuitable for repairing precipitation-strengthened superalloys, and particularly gamma prime-strengthened nickel-based superalloys. The process entails forming a weldment in a cavity present in a surface of an article formed of a precipitation-strengthened superalloy. The cavity has a root region and a cap region between the root region and the surface of the article. A solid body formed of a superalloy composition is placed in the root region of the cavity so as to occupy a first portion but not a second portion of the root region. A first filler material formed of a solid solution-strengthened superalloy is then weld-deposited in the second portion of the root region. Subsequently, a second filler material formed of a precipitation-strengthened superalloy is weld-deposited in the cap region of the cavity.