Abstract: The present invention provides an alloy having improved crack growth inhibition and having high strength at high temperatures. The composition of the alloy is essentially as follows:______________________________________ Ingredient Concentration in weight % ______________________________________ Ni balance Co 8 Cr 13 Mo 3.5 Al 3.5 Ti 2.5 Ta 3.5 Nb 3.5 Zr 0.06 C 0.05 B 0.

Abstract: An aluminum-lithium based alloy which comprises 10-20 wt. % silicon, 1.5-5.0 wt. % copper, 1.0-4.0 wt. % lithium, 0.45-1.5 wt. % magnesium, 0.01-1.3 wt. % iron, 0.01-0.5 wt. % manganese, 0.01-1.5 wt. % nickel, 0.01-1.5 wt. % zinc, 0.01-0.5 wt. % silver, 0.01-0.25 wt. % titanium and the balance aluminum. The alloy is utilized to cast high temperature assemblies including pistons which have a reduction in density and similar mechanical properties including tensile strengths to alloys presently used.

Abstract: The alloy of the invention has improved intermediate temperature properties at temperatures up to about 482.degree. C. The alloy contains (by weight percent) a total of about 6-12% X contained as an intermetallic phase in the form of Al.sub.3 X. X is selected from the group consisting of Nb, Ti and Zr. The alloy also contains about 0.1-4% strengthener selected from the group consisting of Co, Cr, Mn, Mo, Ni, Si, V, Nb when Nb is not selected as X and Zr when Zr is not selected as X. In addition, the alloy contains about 1-4% C and about 0.1-2% O.

Abstract: A work-strengthenable alloy which includes a gamma prime phase gamma prime particles comprising the following elements in percent by weight:______________________________________ molybdenum 6-16 chromium 13-25 iron 0-23 nickel 10-55 carbon 0-0.05 boron 0-0.05 cobalt balance, at least 20, ______________________________________said alloy also containing one or more elements which form gamma prime phase with nickel,the electron vacancy number, N.sub.v, of the alloy being defined byN.sub.v =0.61 Ni+1.71 Co+2.66 Fe+4.66 Cr+566 Mowherein the respective chemical symbols represent the effective atomic fractions of the respective elements present in the alloy, said value not exceeding the valueN.sub.v =2.82-0.017 W.sub.Fe,where W.sub.Fe is the percent by weight of iron in the alloy for those alloys containing no iron or less than 13 percent by weight iron and W.sub.Fe is 13 for the alloys containing from 13-23 percent by weight iron. The alloys are formed by a melt; and heating the alloy at a temperature of from 600.

Abstract: Nickel aluminide single crystal alloys having improved strength and ductility at elevated temperatures, produced by major elemental additions to strengthen the Ni.sub.3 Al phase by solid solutioning and/or secondary phase formation. The major elemental additions comprise (by weight) 7-20% Al, 0.5-9% molybedenum, 0.5-10% tungsten and 2-15% titanium. Optional minor elemental additions of boron, manganese, silcon and/or hafnium are preferred.

Abstract: Ultrasonic blade coupler comprising a blade element composed of a material selected from aluminum and titanium rendered sharpenable by a surface hardening treatment. The blade coupler exhibits improved acoustical properties with reduced energy consumption.

Abstract: A process for identificaiton, evaluation and removal of microshrinkage of investment cast superalloy parts and parts produced by the process. Parts free of deleterious microshrinkage capable of longer life at existing stress levels or use at higher alternating stresses are produced by first subjecting the parts to hot isostatic pressing to eliminate nonsurface connected subsurface microshrinkage. Next, in order to expose near-surface microshrinkage microscopically connected to the surface, the parts are immersed in an acid solution for a time sufficient to uniformly remove at least about 0.005 inches of the original as cast surface. The exposed microshrinkage is evaluated for acceptability or removal by standard nondestructive techniques, such as liquid penetration evaluation.

Abstract: For the annealing of steel in continuously operating units, the formation of so-called white dust is almost completely eliminated by subjecting the steel to a deoxidizing pretreatment before the annealing sequence so as to at least largely remove the oxygen adsorbed on the surface of the steel, as well as any oxygen compounds also present on the surface.

Abstract: A manufacturing method for the production of aluminum-lithium alloys at low cost is disclosed which includes enclosing lithium with aluminum by means of a cold extrusion of pure lithium and melting the aluminum-sealed lithium ingots in an ambient atmospheric condition. The extrusion process can be simply performed in air as well as in an inert atmosphere at room temperature. The atmospheric melting of aluminum-lithium alloys is performed by immersing and agitating aluminum-sealed lithium ingots beneath the surface of molten aluminum with a graphite plunger.

Abstract: A gold alloy comprises at least gold, iron and nickel, the gold being present in an amount between about 74.4 and 94.5 percent by weight of the alloy, the iron being present in an amount between about 5.0 and 25.0 percent by weight of the alloy, and the nickel being present in an amount between about 0.5 to about 0.6 percent by weight of the alloy. Heat treatment of the alloy causes a visually observable blue coloration.

Abstract: A copper based alloy, which when employed in a marine environment with a cathodic protection system or when galvanically coupled to a dissimilar metal, is resistant to hydrogen embrittlement, copper being present in an amount of about 70% to 80% by weight, and the alloy having in addition, (by weight):______________________________________ nickel 13.5% to 20.0% aluminium 1.4% to 2.0% manganese 3.4% to 9.3% iron 0.5% to 1.5% chromium 0.3% to 1.0% niobium 0.5% to 1.0% ______________________________________and wherein the constituent elements are so controlled that:A Cu/(Mn+Ni) is less than 4.9 in terms of weight %;B Cu/(Mn+Ni) is greater than 3 in terms of weight %;C Al+Nb is at least 2.1 in terms of weight %; andD Ni/(Al+Nb) is at least 6.0 in terms of weight %.

Abstract: An iron-based alloy with improved performance with exposure to oxygen-sulfur mixed gases with the alloy containing about 9-30 wt. % Cr and a small amount of Nb and/or Zr implanted on the surface of the alloy to diffuse a depth into the surface portion, with the alloy exhibiting corrosion resistance to the corrosive gases without bulk addition of Nb and/or Zr and without heat treatment at temperatures of 1000.degree.-1100.degree. C.

Abstract: A rotary oil seal gas purge system for a rotary carburizing furnace, having a rotatable hearth in a furnace chamber containing a high carbon-potential furnace atmosphere comprising an endothermic carrier gas enriched with a hydrocarbon gas, features gas purge ports located adjacent to the oil seal(s) of the hearth for injecting non-carbon-enriched endothermic gas to purge the high carbon-potential furnace atmosphere from the area adjacent the seal(s) and prevent carbon precipitation into the seal(s). Also disclosed is an oil seal management system for a rotary carburizing furnace including a settling tank for accepting seal oil from the furnace oil seal(s), a pump supply tank for receiving oil from the settling tank, a pump for pumping oil from the pump supply tank through a heat exchanger and to the furnace oil seal(s), and a centrifuge for cleaning seal oil coming from the heat exchanger before returning it to the pump supply tank.

Abstract: Disclosed is an aluminum alloy suitable for high temperature applications comprised of at least 9 wt. % Si, 3 to 7 wt. % Ni, 1.5 to 6 wt. % Cu, at least one of the elements selected from Mg, Mn, V, Sc, Fe, Ti, Sr, Zn, B and Cr, the remainder aluminum and impurities.

Abstract: An aluminum-based bearing alloy of the invention comprises 3-40% Sn, 0.1-10% Pb, 0.1-5% Cu, 0.1-3% Sb, total 0.05-1% of Ti and B which satisfy the equation: B/Ti+B=0.1 to 0.35, and the balance being essentially Al. The aluminum-based bearing alloy according to the present invention has excellent fatigue resistance and anti-seizure property.

Abstract: A method of improving the low temperature ductility of an iron-aluminide is taught. The aluminide for which the method is applicable is one having between 30 and 50 atom percent of aluminum. The aluminide may also have substituents for part of the iron and for the aluminum. The alloy may contain up to 10 atom percent of substituents for the iron selected from the group of metals comprising nickel cobalt chromium and manganese. The alloy may also contain substituents for the aluminum of up to 5 atom percent of a metal selected from the group comprising titanium, niobium, tantalum, hafnium, zirconium, vanadium, and silicon. The alloy has a B2 crystal structure. The first step of the process is to select the metal to be processed. The next step is to directionally solidify the selected metal. The next step is to determine the Ductile Brittle Transition Temperature (DBTT). The metal is then heated to above the DBTT and is deformed while above the DBTT temperature.

Abstract: A method is disclosed for heat treating the flutes of a corrugating roll. A laser having a beam with a Gaussian power density distribution is provided for heating the flutes. The beam from the laser is reconfigured by an integrator mirror to form a beam having a homogeneous power density distribution, which is subsequently interrupted by a copper rod to form a substantially U-shaped beam. The beam is positioned over an end of the roll with the open end opposing the center of the corrugating roll, and the roll is traversed relative to the beam, whereby the flute is heat treated.

Abstract: The invention relates to a process for the production of targets to be used in the vacuum deposition of aluminium alloy by cathodic sputtering.The process consists of a heat treatment of the aluminium alloy disks making it possible to obtain a fine grain. It is characterized by the dissolving of the silicon, followed by controlled cooling bringing about the fine precipitation of the silicon and an optional silicon spheroidization treatment. After cooling, the disks are deformed with the press and undergo a final recrystallization treatment.The process is applied to the production of targets or cathodes for the coating of semiconductor silicon wafers by cathodic sputtering.

Abstract: The invention concerns a cold-worked steel of high compressive strength for tools and parts simultaneously subjected to several stresses.The steel of the invention evinces a composition in % by weight ofC: 0.6 to 1.5Si: 0.2 to 1.6Mn: 0.2 to 1.2Cr: 5.0 to 10.0Mo: up to 3.0W: up to 6.0(Mo+2W): 1.0 to 3.0V: 0.3 to 1.5Al: 0.2 to 1.6Nb: up to 0.5N: up to 0.1the remainder being iron and process-entailed contaminations, and it is especially provided for tools and parts comprising an anti-wear layer made at higher temperature.

Abstract: An alloy essentially consisting of 35-40% Ni, 5-14% Cr and balance Fe and unavoidable impurities has excellent alternating current magnetic characteristics and good direct current magnetic characteristics.