Abstract: The invention relates to a process for improving the aging response and uniformity in a beta titanium alloy comprising the steps of:(a) cold working said beta titanium alloy to at least about 5% so that a reasonable degree of recrystallization can be obtained during subsequent solution treatment;(b) pre-aging said cold worked alloy at about 900.degree. to about 1300.degree. F. for a time in excess of about 5 minutes to obtain a pre-aged alloy;(c) solution treating said pre-aged alloy at a time and temperature to achieve a reasonable degree of recrystallization of said pre-aged alloy above the beta transus; and(d) aging said solution treated alloy at temperature and times to achieve a pre-aged, solution treated and aged beta titanium alloy substantially in a state of metallurgical equilibrium.

Abstract: A Ti-Al type lightweight heat-resistant consists essentially of 32 to 36% w of Al, 0.1 to 2.0% w of Si, 0.1 to 5.0% w of Nb, 0.1 to 3.0% w of Cr, and optionally 0.005 to 0.200% w of B, the balance being substantially Ti. The alloy has improved oxidation resistance together with excellent ductility and strength at room temperature and high temperature.

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: A process as described for treating Ti.sub.3 Al-based alloys comprising, in ddition to titanium and aluminum as .alpha.-phase-stabilizing element, niobium and further elements stabilizing the .beta.-phase in an amount of from 20 to 30% by weight, wherein the further elements stabilizing the .beta. phase are present in an amount of at least 4% by weight by(a) preparing the alloys by melting or via the powder-metallurgical route,(b) deforming at a temperature within the (.alpha..sub.2 +.beta.)-phase area by more than 60% in one or more steps with stress-relief annealing without complete recrystallization effected between these steps,(c) solution annealing the formed part for from 5 minutes to 120 minutes below the .beta.-transus temperature of the alloy,(d) quenching, and(e) subsequent aging/stress-relief annealing at temperatures within the range of from 500.degree. for 75.degree. C. for from 0.5 to 24 hours.

Abstract: A beta titanium alloy having exceptional high temperature strength properties in combination with an essential lack of combustibility is described. In its basic form the alloy contains chromium, vanadium and titanium the nominal composition of the basic alloy being defined by three points on the ternary titanium-vanadium-chromium phase diagram: Ti-22V-13Cr, Ti-22V-36Cr, and Ti-40V-13% Cr. The alloys of the invention are comprised of the beta phase under all the temperature conditions, have strengths much in excess of the prior art high strength alloys in combination with excellent creep properties, and are nonburning under conditions encountered in gas turbine engine compressor sections.

Abstract: The titanium alloy T1 17, having a nominal composition of about 5 weight percent aluminum, about 2 weight percent zirconium, about 2 weight percent tin, about 4 weight percent molybdenum, about 4 weight percent chromium, no more than about 1.1 percent of other elements, and balance titanium, is electrochemically machined using an electrolyte comprising an aqueous solution of from about 0.94 to about 1.16 moles per liter of bromide anion and from about 0.09 to about 0.55 moles per liter of sodium nitrate.

Abstract: A wear-resistant titanium alloy containing titanium carbides which are crystallized and/or precipitated and are dispersed in the .beta.-phase matrix is disclosed. The alloy may further comprise .alpha.-phase and/or additional hard particles dispersed in the .beta.-phase matrix.

Abstract: High strength titanium alloys containing about 45-55% by weight of titanium, about 25-45% by weight of vanadium and 10-20% by weight chromium alloys are disclosed.These latter two components are first alloyed into a master alloy before addition to the titanium resulting in reduced inclusions of vanadium.

Abstract: A Ti-Al based lightweight-heat resisting material containing 30 to 42 wt % of Al, which is improved in oxidation resistance by coexistence of 0.1 to 2 wt % of Si and 0.1 to 5 wt % of Nb.

Abstract: An alloy for occluding hydrogen is represented by the formula TiCr.sub.x Cu.sub.y (wherein x and y stand for numerical values satisfying the expressions, 0.01.ltoreq.y.ltoreq.0.4 and 1.3.ltoreq.x+y.ltoreq.2.0) and has an ability to occlude hydrogen at a lower temperature than the temperatures required by the conventional countertypes for occluding hydrogen.

Abstract: Improved titanium alloys for dental castings and processes for the preparation thereof, characterized by the incorporation of predetermined small amounts of one or more noble metals, preferably ruthenium, or rhenium, and optional predetermined small amounts of one or more rare earth metals, preferably cerium. The present alloys have improved corrosion and tarnish resistance under the conditions of use, and the preferred compositions including rare earth metals have improved oxidation resistance which improves their receptivity and bonding strength for enamels, porcelain surfacing materials or caps.

Abstract: A composition for providing improved castability in a gamma titanium aluminide is taught. The method involves adding inclusions of boron to the titanium aluminide containing higher concentrations of niobium. Boron additions are made in concentrations between 0.5 and 2 atomic percent. Fine grain equiaxed microstructure is found from solidified melt. Property improvements are also achieved.

Abstract: A method for providing improved ductility in a castable gamma titanium aluminide is taught. The method involves adding inclusions of boron to the titanium aluminide containing higher concentrations of niobium and thermomechanically working the casting. Boron additions are made in concentrations between 0.5 and 2 atomic percent. Fine grain equiaxed microstructure is found from solidified melt. Property improvements are achieved by the thermomechanical processing.

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: A titanium-base alloy characterized by a combination of good oxidation resistance at temperatures of at least 1500.degree. F. and good cold rollability. The alloy consists essentially of, in weight percent, molybdenum 14 to 20, niobium 1.5 to 5.5, silicon 0.15 to 0.55, aluminum up to 3.5, oxygen up to 0.25 and balance titanium. Preferably, molybdenum is 14 to 16, niobium is 2.5 to 3.5, silicon is 0.15 to 0.25, aluminum is 2.5 to 3.5 and oxygen is 0.12 to 0.16. The alloy may be in the form of a cold reduced sheet or foil product having a thickness of less than 0.1 inch. This product may be produced by cold rolling to effect a reduction within the range of 10 to 80%.

Abstract: Improved technology for the melting and casting of a particular class of true beta-type titanium alloys is described. A typical alloy is titanium--35% vanadium--15% chromium. By providing carbon surfaces for contacting molten beta titanium alloys of this type improved melting and casting procedures are effectuated.

Abstract: A method of fabricating intermetallic compounds of TiAl and TiAl.sub.3 into shapes including a foil utilizing an arc spray process in which bimetalic titanium aluminum or low titanium aluminum and low aluminum titanium wires of the proper proportions are used to form an intermetallic compound overlay, which is densified to form the shape.

Abstract: A high strength and corrosion resistant titanium alloy having excellent corrosion-wear properties may be prepared in that Al and Mo are added as alloying elements in specific amounts, and if Zr in a specific amount is further added, the strength and the corrosion-wear properties would be more improved.

Abstract: Disclosed is a wear-resistant intermetallic compound alloy having superior machineability which consists essentially of: 45-60% of either Ni or Co or both with cobalt content of at least 5%, at least one of 0.1-2% of Hf and 0.05-2% of Re, 0-2% of at least one element selected from the group consisting of Si, P, Cu, Zn, Ga, Ge, Cd, In, Sn, Sb, Pb and Bi, 0-2% of C, and 0-5% of at least one element selected from the group consisting of Zr, Fe, V, Nb, Ta, Cr, Mo, W and Mn, the balance being Ti and incidental impurities, the percent being atomic percent.

Abstract: A method for producing a titanium strip having a small proof strength anisotropy and an improved ductility comprises the steps of: reheating a hot rolled titanium strip containing 0.1% by weight or less of oxygen and 0.1 to 0.5% by weight of iron at a .beta. region temperature and cooling by water, aging the obtained titanium strip at a temperature of 200.degree. to 500.degree. C. for 30 minutes or more, cold rolling the titanium strip at a rolling reduction of 30% or more; and, annealing the cold rolled titanium strip at a temperature of 600.degree. to 800.degree. C.

Abstract: A high strength, low modulus, ductile, biocompatible titanium base alloy containing one or more isomorphous beta stabilizers, eutectoid beta stabilizers and optional alpha stabilizers, characterized by a modulus of elasticity not exceeding 100 GPa; a method for the preparation of said alloy and prostheses made from said alloy.

Abstract: Four groups of advanced hydrogen hydride storage and hydride electrode materials, consisting of two common elements, titanium and nickel. In the first group of materials, zirconium and chromium are added with the common elements. The second group of materials contain three additional elements in addition to the common elements, namely, chromium, zirconium and vanadium. The third group of materials contain also, in addition to the common elements, zirconium and vanadium. The fourth group of materials adds manganese and vanadium with the common elements. The preparation methods of the materials, as well as their hydride electrode are disclosed. Electrochemical studies indicate that these materials have high capacity, long cycle life and high rate capability.

Abstract: A TiAl composition is prepared to have high strength and to have improved ductility by altering the atomic ratio of the titanium and aluminum to have what has been found to be highly desirable effective aluminum concentration by addition of tantalum according to the approximate formula Ti.sub.48 Al.sub.48 Ta.sub.4.

Abstract: A TiAl composition is prepared to have high strength and to have improved ductility by altering the atomic ratio of the titanium and aluminum to have what has been found to be a highly desirable effective aluminum concentration by addition of chromium according to the approximate formula Ti.sub.52-50 Al.sub.46-48 Cr.sub.2.

Abstract: A TiAl composition is prepared to have high strength and to have improved ductility by altering the atomic ratio of the titanium and aluminum to have what has been found to be a higly desirable effective aluminum concentration by addition of boron according to the approximate compositions displayed in the shaded area of FIG. 10.

Abstract: A TiAl composition is prepared to have high strength and to have improved ductility by altering the atomic ratio of the titanium and aluminum to have what has been found to be a highly desirable effective aluminum concentration by addition of silicon according to the approximate formula Ti.sub.54-57 Al.sub.39-41 Si.sub.4-5.

Abstract: The present invention relates to the reaction of hydrogen gas with alloys having body-centered cubic phase structure at a temperature of less than 100.degree. C. which comprise titanium and a second metal selected from the group consisting of zirconium, rhenium, manganese, and iron, and further comprising when the second metal is zirconium or rhenium, at least about 1 atom percent of a third metal selected from the group of aluminum, cobalt, chromium, iron, manganese, nickel, copper, silicon, germanium, gallium and mixtures thereof. The alloys of this invention react with hydrogen at a reaction rate much faster than prior art materials.

Abstract: An excellently corrosion-resistant titanium-base alloy comprises, all by weight, either from 0.005% to less than 0.2% ruthenium or from 0.005% to 2.0% palladium or both, at least one of from 0.01% to 2.0% nickel, from 0.005% to 0.5% tungsten, and from 0.01% to 1.0% molybdenum, and the remainder titanium and unavoidable impurities.

Abstract: A flexible circuit laminate is presented comprising a microglass reinforce fluoropolymer layer sandwiched between a fluoropolymer coated polyimide and a copper conductive pattern. The glass reinforced fluoropolymer acts as a high bond strength adhesive between the fluoropolymer coated polyimide and copper conductive pattern. The glass reinforced fluoropolymer also contributes to improved dimensional stability as well as improved electrical performance. Preferably, the microglass content is between about 4 to about 30 weight percent, and more preferably about 20 weight percent glass.

Abstract: A titanium alloy has greatly increased specific strength and increased thermostability. The alloy consists of a titanium matrix in which fibrous dispersoids are formed in situ. The dispersoids are rod and/or plate shaped and have a diameter or depth of about 0.1-0.5 microns and an aspect ratio of about 5-10. A typical alloy has the composition A-X where A is titanium or titanium alloy and X is boron, carbon, nitrogen, mixtures thereof, or mixtures with silicon.

Abstract: There is provided a Ti-Mo alloy containing 0.2 to 3.0 wt % of molybdenum, with the balance being substantially titanium, characterized in that the amount of Fe in the impurities is not greater than 0.1% and the amount of O.sub.2 in the impurities is in the range that satisfies the following equation on the basis of the amount of Mo (%).O.sub.2 (%).ltoreq.9/35-1/28.multidot.Mo (%)said titanium alloy being highly resistant to pitting corrosion in an environment where there are bromide ions and being superior in formability. Said alloy undergoes heating at a temperature higher than 700.degree. C. and lower than the .alpha.-transformation point and then cooling at a rate of 500.degree. C./min or less, whereby said alloy is rendered malleable.

Abstract: To increase the creep strength of a titanium-containing alloy which also contains chromium, the alloy powder is heated in the presence of ammonia at a temperature of the order of 700.degree. C. so as to form a layer of chromium nitride(s) on the particles and is then heated further in an inert atmosphere at a temperature between 1000.degree. C. and 1150.degree. C. to dissociate the chromium nitride(s) thereby effecting nitriding of the titanium to titanium nitride which affords dispersion-strengthening of the alloy.

Abstract: Alloys comprising titanium and aluminum, or titanium, aluminum and at least one of the metals M, wherein M is vanadium, zirconium, chromium, niobium, tantalum and/or iron, are facilely prepared by reducing an alkali metal fluotitanate, or coreducing admixture of an alkali metal fluotitanate and at least one halide of a metal M, with aluminum, in the presence of an alkali metal oxide reactive flux, either Na.sub.2 O and/or K.sub.2 O; next solubilizing with water the fluorine compounds of reduction/coreduction which are in admixture of reduction/coreduction with dispersion of the aforesaid metals in metallic state; separating said dispersion of metals in metallic state from said admixture of reduction/coreduction; and then alloying by melting and cooling said separated dispersion of metals in metallic state.