Abstract: The invention is an aluminum base brazing alloy for brazing assemblies of titanium and titanium alloys with excellent wetting capability characteristics and the capability of forming large fillets at a relatively low temperature of 1470.degree. F., consisting essentially by weight of about 2.0% to 6.0% silicon, 2.5% to 6.0% tin, 13.0% to 28.0% copper and the balance aluminum.

Abstract: A silver based brazing alloy having a composition in percent by weight of 5 to 15 germanium, 8 to 18 zinc, 5 to 39 copper and the balance silver has a wide melting range and a high degree of fluidity when molten and is especially suited for wide-gap brazing of steel assemblies in food handling equipment where cadmium containing brazing alloys cannot be used because of their toxicity.

Abstract: Alloys of the type Cu.sub.x Ge.sub.y wherein x is from about 60 to about 95 atomic percent and y is from about 5 to about 40 atomic percent are made ductile by the presence of appreciable amounts of an amorphous phase and a metastable, microcrystalline, solid solution single phase and are especially suited for fabrication of foil preforms for preplacement in the joint in a joining operation such as brazing.

Abstract: Alloys of the atomic composition, Ag.sub.(25-66) Cu.sub.(16-68) In.sub.(7-18) in the form of thin foil, are made ductile by the presence of appreciable amounts of amorphous phase and a metastable, micro-crystalline, solid solution, single phase and are especially suited for fabricating preforms for preplacement in a joint to be joined by an operation such as brazing.

Abstract: Nickel-Chromium-Silicon alloys of the nominal composition, Ni.sub.(45-78) Cr.sub.(16-34) Si.sub.(6-21) in the form of thin foil are made ductile by the presence of appreciable amounts of an amorphous phase and a metastable, solid solution, microcrystalline single phase and are especially suitable for preplacement as preforms in a joining operation such as brazing. Up to abour 40 atomic percent of the nickel is replaceable with palladium.

Abstract: Cast superalloys of the formula P.sub.x Q.sub.y R.sub.z wherein P is an element selected from the group consisting of Fe, Ni, Cr, Co or mixtures thereof, wherein Q is a refractory element selected from the group consisting of Mo, W, Ta or a mixture thereof wherein R is a reactive element selected from the group consisting of Al, Ti, Cb or mixtures thereof, x is from about 65 to about 95 atomic percent, y is from about 1 to about 10 atomic percent, z is from about 1 to about 18 atomic percent and x+y+z is equal to about 100 in the form of thin foil are made ductile by the presence of appreciable amounts of amorphous phase and micro-crystalline, metastable single phase and subsequently boron is deposited as nickel, iron or cobalt boride on the surface of the foil at a temperature below the crystallization temperature of the superalloy. Such foil is especially suited for preplacement in a joining operation such as brazing.

Abstract: A brazing alloy composition consisting essentially of from about 17 to about 44 percent by weight of palladium, from about 4 to 11 percent by weight of chromium, from about 1 to about 4 percent by weight of silicon from about 1.5 to about 4 percent by weight of boron and the balance nickel is suitable for brazing in the temperature range of from about 1750.degree. F. to about 1850.degree. F. with a recommended brazing temperature of about 1800.degree. F. The brazing temperature of the brazing alloy of this invention is lower than the brazing temperatures of conventional Ni-base phosphorus-free brazing alloys and has good stress-rupture characteristics and oxidation resistance up to 1400.degree. F.