An alloy for cladding cast iron is disclosed. The alloy may include on a weight basis, about 6.2% to about 9.3% of chromium (Cr), about 3.0% to about 4.5% of iron (Fe), about 1.4% to about 2.15% of silicon (Si), about 0.5% to about 0.8% of boron (B), about 0.1% of carbon (C), and a balance of nickel (Ni) and incidental impurities.

A precipitation strengthened nickel based welding material that comprises 5-15 wt. % Co, 5-25 wt. % Cr, 1-6 wt. % Al, 0.05-0.2 wt. % C, 0.015-0.4 wt. % B, 1-3 wt. % Si, chemical elements selected from among tungsten and molybdenum from about 1 to 20 wt. %, chemical elements selected from among titanium, zirconium, hafnium, tantalum and rhenium from about 1 to 18 wt. % and nickel with impurities to balance, wherein the boron content is inversely proportional to silicon content and decreases from about 0.3 wt. % to about 0.015 wt. % when silicon content increases from about 1 wt. % to about 3 wt. % produces sound high strength and high oxidation resistance crack free welds on precipitation strengthened superalloys and single crystal materials.

Disclosed is the semi-amorphous, ductile brazing foil with composition consisting essentially of Ni.sub.balCr.sub.aB.sub.bP.sub.cSi.sub.dMo.sub.eFe.sub.f with approximately 24 atomic percentaapproximately 31 atomic percent; bapproximately 3 atomic percent; approximately 9 atomic percentcapproximately 11 atomic percent; approximately 2 atomic percentdapproximately 4 atomic percent; eapproximately 2 atomic percent; fapproximately 1 atomic percent; and the balance being Ni and other impurities; where b+c+d<approximately 16 atomic percent.

An assembly including a ceramic body. The assembly comprises a tungsten coupling attached to the ceramic body with a first joint that forms a first helium tight seal between the ceramic body and the tungsten coupling and where the first helium tight seal maintains its integrity at a temperature over 400 C. The assembly includes a metal body attached to the tungsten coupling with a second joint that forms a second helium tight seal between the metal body and the tungsten coupling and where the second helium tight seal maintains its integrity at a temperature over 400 C. A method. A mixture. A coupling.

A flux cored welding electrode for welding a 5-9% nickel steel workpiece by a flux cored arc welding (FCAW) process comprises a particulate core and a metal sheath surrounding the particulate core, wherein chemical composition of the metal sheath and the chemical composition of the particulate core are selected so that the weld deposit composition produced by the welding electrode comprises 0.15 C, 6.0 Mn, 1.0 Si, 0.025 P, 0.020 S, 12.0-20.0 Cr, 55.0 Ni, 5.5-7.5 Mo, 1.2-1.8 Nb+Ta, 12 Fe, 0.3 Cu and 0.5-4.0 W.

A method of forming a hybrid component having an axis of rotation includes forming a first substrate having a first average grain size, forming a second substrate having a second average grain size different from the first average grain size, positioning an interlayer on one of the first and second substrates, positioning a portion of the first substrate adjacent a portion of the second substrate such that the interlayer extends between the portion of the first substrate and the portion of the second substrate, heating the first and second substrates and the interlayer at a temperature below the melting points of the first and second substrates to melt the interlayer, and isothermally solidifying the interlayer to form a solid-state joint between the portions of the first and second substrates.

A system for sealing an internal passage of a component includes a closure element positioned within the internal passage, and a joint material coupling the closure element to at least one passage wall that defines the internal passage. The system also includes a flexible braze element positioned proximate the closure element, the joint material, and the at least one passage wall.

An article and a method for making shaped cooling holes in an article are provided. The method includes the steps of depositing a metal alloy powder to form an initial layer including at least one aperture, melting the metal alloy powder with a focused energy source to transform the powder layer to a sheet of metal alloy, sequentially depositing an additional layer of the metal alloy powder to form a layer including at least one aperture corresponding to the at least one aperture in the initial layer, melting the additional layer of the metal alloy powder with the focused energy source to increase the sheet thickness, and repeating the steps of sequentially depositing and melting the additional layers of metal alloy powder until a structure including at least one aperture having a predetermined profile is obtained. The structure is attached to a substrate to make the article.

A high strength joint material. A material for a joint between a ceramic body and a metal body. A material for a joint between a ceramic body and a ceramic body.

A precipitation strengthened nickel based welding material that comprises 5-15 wt. % Co, 5-25 wt. % Cr, 1-6 wt. % Al, 0.05-0.2 wt. % C, 0.015-0.4 wt. % B, 1-3 wt. % Si, chemical elements selected from among tungsten and molybdenum from about 1 to 20 wt. %, chemical elements selected from among titanium, zirconium, hafnium, tantalum and rhenium from about 1 to 18 wt. % and nickel with impurities to balance, wherein the boron content is inversely proportional to silicon content and decreases from about 0.3 wt. % to about 0.015 wt. % when silicon content increases from about 1 wt. % to about 3 wt. % produces sound high strength and high oxidation resistance crack free welds on precipitation strengthened superalloys and single crystal materials.