Abstract: Composite structures having a higher density, stronger reinforcing niobium based alloy embedded within a lower density, lower strength niobium based alloy are provided. The matrix is preferably an alloy having a niobium and titanium base according to the expression:Nb.sub.balance --Ti.sub.31-48 --Al.sub.8-21.The reinforcement may be in the form of strands of the higher strength, higher temperature niobium based alloy. The same crystal form is present in both the matrix and the reinforcement and is specifically body centered cubic crystal form.

Abstract: Superconductors formed by powder metallurgy have a matrix of niobium-titanium alloy with discrete pinning centers distributed therein which are formed of a compatible metal. The artificial pinning centers in the Nb-Ti matrix are reduced in size by processing steps to sizes on the order of the coherence length, typically in the range of 1 to 10 nm. To produce the superconductor, powders of body centered cubic Nb-Ti alloy and the second phase flux pinning material, such as Nb, are mixed in the desired percentages. The mixture is then isostatically pressed, sintered at a selected temperature and selected time to produce a cohesive structure having desired characteristics without undue chemical reaction, the sintered billet is reduced in size by deformation, such as by swaging, the swaged sample receives heat treatment and recrystallization and additional swaging, if necessary, and is then sheathed in a normal conducting sheath, and the sheathed material is drawn into a wire.

Abstract: An alloy comprising titanium, aluminum and niobium has a heterophase micrructure of an orthorhombic, Ti.sub.2 AlNb, phase and an omega-type, B8.sub.2, phase. An alloy is annealed to form the heterophase alloy with the orthorhombic and omega-type phases in thermodynamic equilibrium, and then cooled.

Abstract: Improvement of Nb-alloys, which are known as heat-resistant alloys, by giving anti-oxidation property thereto and increasing the high temperature strength thereof. In addition to a determined amount of Al, one of (1) suitable amounts of Ti, Cr and V, and (2) suitable amounts of Cr and Co, are added to Nb-matrix, and a high melting temperature metal oxide such as Y.sub.2 O.sub.3 or Al.sub.2 O.sub.3 is dispersed in the matrix. Preferable method of preparing the alloys is combination of mechanical alloying and subsequent hot processing.

Abstract: A wrought metal alloy product having a tantalum or niobium base metal, 10 to 1000 ppm silicon, and 10 to 10000 ppm yttrium nitride. Fine uniform grain size contributes to improved ductility.

Abstract: An improved titanium aluminide alloy contains from about 18 to 30 atomic percent aluminum, about 34 to 18 atomic percent niobium, with the balance titanium. In alloys of this invention a substatial portion of the microstructure, comprising at least about 50% of the volume fraction, is an orthorhombic phase.

Abstract: An amorphous aluminum-refractory metal alloy with special characteristics such as high corrosion resistance, high wear resistance and considerable toughness, consisting of Al and at least one element selected from refractory metals of Ta, Nb, Mo and W, a portion of the set forth refractory metals being allowed to be substituted with at least one element selected from Ti and Zr.

Abstract: A superalloy composition comprising niobium, an element selected from the group consisting of rhenium and technetium, and, optionally, an element selected from the lanthanide and actinide series, scandium, yttrium and lanthanum.

Abstract: An alloy is provided which has good operating strength and ductility at temperatures of 2000.degree. to 2500.degree. F. and density of between 7.0 and 7.3. The alloy contains niobium titanium and hafnium in concentrations as set forth below:______________________________________ Concentration in Atom % Ingredient From To ______________________________________ Niobium balance essentially Titanium 35 45 Hafnium 10 15.

Abstract: An alloy is provided for use at high temperature. The alloy is a niobium-titanium base alloy and has the following approximate composition.______________________________________ Concentration in atomic percent Ingredient From About To About ______________________________________ Nb balance essentially Ti 31 48 Al 8 21.

Abstract: An alloy having high strength at high temperature is provided. The alloy has the following approximate composition in atom percent:______________________________________ niobium balance titanium 40-48% aluminum 12-22% hafnium 0.

Abstract: An alloy is provided having exceptional strength at very high temperatures of 1200.degree. C. and higher.

Abstract: An alloy having a niobium titanium base and aluminum and chromium additives is provided. The alloy has superior strength and ductility at high temperatures.

Abstract: An alloy is provided which has good operating strength and ductility at temperatures of 2000.degree. to 2500.degree. F. and density of between 6.5 and 7.0 g/cm.sup.3.

Abstract: An alloy having high strength at high temperature is provided.

Abstract: A highly corrosion-resistant amorphous Cu alloys with at least one element selected from the group of Ta and Nb and other Cu-Ta alloys with at least one element selected from the group of Nb, Ti and Zr, wherein the total content of alloying elements other than Cu ranges from 15 to 85 at %.

Abstract: An alloy is provided for use at high temperature. The alloy is a niobium-titanium base alloy and has the following approximate composition.______________________________________ Concentration in atomic percent Ingredient From About To About ______________________________________ Nb balance essentially Ti 31 48 Al 8 21.

Abstract: The present invention provides a method for producing a consolidated article composed of a transition metal alloy. The method includes the step of selecting a rapidly solidified alloy which is at least about 50% glassy. The alloy is formed into a plurality of alloy bodies, and these alloy bodies are compacted at a pressing temperature of not more than about 0.6 Ts (solidus temperature in .degree.C.) to consolidate and bond the alloy bodies together into a glassy metal compact having a density of at least about 90% T.D. (theoretical density). The compacted glassy alloy bodies are then heat treated at a temperature generally ranging from about 0.55-0.85 Ts, but, in any case, above the alloy crystallization temperature, for a time sufficient to produce a fine grain crystalline alloy structure in the compacted article.