Abstract: An iron-based rare-earth nanocomposite magnet according to the present invention includes an Nd2Fe14B phase and an ?-Fe phase and has a composition represented by the compositional formula: T100-x-y-z-n(B1-qCq)xRyTizMn, where T is at least one transition metal element selected from the group consisting of Fe, Co and Ni and always including Fe, R is at least one rare-earth element including substantially no La or Ce, and M is at least one metal element selected from the group consisting of Al, Si, V, Cr, Mn, Cu, Zn, Ga, Zr, Nb, Mo, Ag, Hf, Ta, W, Pt, Au and Pb, and the mole fractions x, y, z, n and q satisfy the inequalities of: 4 at %?x?10 at %, 6 at %?y?10 at %, 0.05 at %?z?5 at %, 0 at %?n?10 at %, and 0.05?q?0.5, respectively. The magnet includes 5 vol % to 60 vol % of ?-Fe phase with an average crystal grain size of 1 nm to 50 nm and 40 vol % to 90 vol % of Nd2Fe14B phase with an average crystal grain size of 5 nm to 100 nm.

Abstract: Disclosed is an amorphous, ductile brazing foil with a composition consisting essentially of NirestCraBbPcSid with 2 atomic percent ?a?30 atomic percent; 0.5 atomic percent ?b?14 atomic percent; 2 atomic percent ?c?20 atomic percent; 0 atomic percent ?d?14 atomic percent; incidental impurities ?0.5 atomic percent; rest Ni, where c>b>c/15 and 10 atomic percent ?b+c+d?25 atomic percent. Also disclosed is amorphous, ductile Ni-based brazing foil having a composition consisting essentially of NirestCraBbPcSidCeXfYg wherein a, b, c, d, e, f, and g are numbers such that 2 atomic percent ?a?30 atomic percent; 0.5 atomic percent ?b?14 atomic percent; 2 atomic percent ?c?20 atomic percent; 0 atomic percent ?d?14 atomic percent; 0 atomic percent ?e?5 atomic percent; 0 atomic percent ?f?5 atomic percent; 0 atomic percent ?g?20 atomic percent; wherein incidental impurities are present, if at all, in amounts ?0.

Abstract: The present invention relates to new compositions of matter, particularly metals and alloys, and methods of making such compositions. The new compositions of matter exhibit long-range ordering and unique electronic character.

Abstract: A hydrogen-absorbing alloy for alkaline storage battery which is produced by a rapid cool using a rapid quenching method and whose component is represented by a general formula Ln1-xMgxNia-b-cAlbZc is used for a negative electrode of an alkaline storage battery.

Abstract: A Fe—Ni based permalloy comprises Ni: 30-85 wt %, C: not more than 0.015 wt %, Si: not more than 1.0 wt %, Nin: not more than 1.0 wt %, P: not more than 0.01 wt %, S: not more than 0.005 wt %, O: not more than 0.0060 wt %, Al: not more than 0.02 wt % and, if necessary, not more than 15 wt % of at least one selected from the group consisting of Mo, Cu, Co and Nb within a range of not more than 20 wt % in total.

Abstract: There is provided a Co-free Ni-base superalloy having a composition containing 1.0 to 10.0 wt % of Cr, 0.1 to 3.5 wt % of Mo, 7.5 to 10.0 wt % of W, 4.0 to 8.0 wt % of Al, 12.0 wt % or less of at least one species of Ta, Nb and Ti, 0 to 2.0 wt % of Hf, 0.1 to 5.0 wt % of Re and the remainder comprised of Ni and unavoidable impurities. The Co-free Ni-base superalloy exhibits high composition stability over a long period of time and is excellent in creep properties at high temperature, and also suitable as a turbine blade or turbine vane of atomic power generation in which maintenance for radioactive contamination and so forth are easy.

Abstract: Directionally solidified columnar grain nickel base alloy casting consisting essentially of, in weight %, of about 11.6% to 12.70% Cr, about 8.50 to 9.5% Co, about 1.65% to 2.15% Mo, about 3.5% to 4.10% W, about 4.80% to 5.20% Ta, about 3.40 to 3.80% Al, about 3.9% to 4.25% Ti, about 0.05% to 0.11% C, about 0.003% to 0.015% B, balance essentially Ni and having substantial transverse stress rupture strength and ductility as compared to a similar casting without boron present.

Abstract: A manufacturing method for an isothermal evaporation casting process is disclosed and to design the manufacturing method for the simple atmospheric casting. The present invention can melt the Mg—Ni alloy with the aspect of totally different melting points thereof, and the other elements can be added during melting simultaneously. Through the Mg—Ni alloy with a suitable weight ratio, the eutectic alloy of Mg/Mg2Ni and high purified ?-phase Mg2Ni can be made. Then adding other elements are to produce the composition of Mg/Ni/M. By way of the manufacturing method of the present invention, the melting equipment is simplified; and, through different manufacturing steps, the purposes of time-saving and low cost are reached; further that, a large amount of the eutectic alloy of Mg/Mg2Ni with different kinds of ratios of Mg, high purified ?-phase Mg2Ni, or the composition of Mg/Ni/M can be obtained.

Abstract: A nickel-based single crystal gas turbine component (30) having a low angle boundary (34) with improved material properties resulting from retained gamma/gamma prime eutectic phase at the low angle boundary. The coarse eutectic phase nodules roughen the grain boundary, reduce the slip distance and disperse concentrated planar slip in the vicinity of the boundary. As a result, the allowable angle of misorientation at the boundary may be increased to greater than 6° for the most highly stressed or critical areas of the component, thereby reducing the amount of scrap material and lowering the cost of manufacturing of a single crystal gas turbine component.

Abstract: The manufacturing methods according to the present teachings provide shape memory alloy products having both a uniform composition and a precise shape memory recovery temperature. In this manufacturing method, raw material powders (e.g., Ti and Ni powders) may be precisely mixed. Next, a compound may be synthesized from the raw material powder mixture using a combustion synthesis method. The combustion synthesized compound may be melted and cast into a desired shape (e.g., a shape of the final product or a shape close to that of the final product).

Abstract: Molds are fabricated having a substrate of high density, high strength ultrafine grained isotropic graphite, and having a mold cavity coated with a refractory metal such as W or Re or a refractory metal carbide such as TaC or HfC. The molds may be made by making the substrate (main body) of high density, high strength ultrafine grained isotropic graphite, by, for example, isostatic or vibrational molding, machining the substrate to form the mold cavity, and coating the mold cavity with titanium carbide via either chemical deposition or plasma assisted chemical vapor deposition, magnetron sputtering or sputtering. The molds may be used to make various metallic alloys such as nickel, cobalt and iron based superalloys, stainless steel alloys, titanium alloys and titanium aluminide alloys into engineering components by melting the alloys in a vacuum or under a low partial pressure of inert gas and subsequently casting the melt in the graphite molds under vacuum or low partial pressure of inert gas.

Abstract: Hydrogen storage alloy has: (1) a main composition expressed by the formula of Mm?(Ni?Al?Co?Mn?Cu); (2) a ratio of the number of atoms expressed by the formula (Ni?Al?Co?Mn?Cu) is 5.5<(Ni+Al+Co+Mn+Cu)?7.0, and 4.0?Ni, when Mm is set at 1 in a ratio of the number of atoms; and (3) an internal structure having hydrogen storage alloy phase expressed by the general formula of AB5 and a second phase existing in the hydrogen storage alloy phase, wherein the whole the composition is expressed by the formula of MmiNi(3.95+p)Al(0.3+q)Co(0.4+r)Mn(0.45+s)Cu(0.10+t), and 0.3<(p+q+r+s+t)?1.8.

Abstract: The present invention relates to new compositions of matter, particularly metals and alloys, and methods of making such compositions. The new compositions of matter exhibit long-range ordering and unique electronic character.

Abstract: An alloy has a composition of, in weight percent, from about 16 percent to about 21 percent chromium, from about 6 percent to about 12 percent iron, from about 6 percent to about 12 percent cobalt, from about 2.8 percent to about 3.3 percent molybdenum, from about 5 percent to about 5.4 percent niobium, from 0 to about 2 percent tantalum, from about 0.65 percent to about 1.15 percent titanium, from about 0.2 percent to about 0.8 percent aluminum, from about 0.01 percent to about 0.05 percent carbon, from about 0.005 percent to about 0.01 percent boron, less than about 0.1 percent zirconium, balance nickel and impurities. A molten mass of this composition may be cast into a mold for solidification. The solid material may be welded either in a rework/repair process or to join it to a second article.

Abstract: A nickel-based single crystal gas turbine component (30) having a low angle boundary (34) with improved material properties resulting from retained gamma/gamma prime eutectic phase at the low angle boundary. The coarse eutectic phase nodules roughen the grain boundary, reduce the slip distance and disperse concentrated planar slip in the vicinity of the boundary. As a result, the allowable angle of misorientation at the boundary may be increased to greater than 6° for the most highly stressed or critical areas of the component, thereby reducing the amount of scrap material and lowering the cost of manufacturing of a single crystal gas turbine component.

Abstract: Molds are fabricated having a substrate of high density, high strength ultrafine grained isotropic graphite, and having a mold cavity coated with pyrolytic graphite. The molds may be made by making the substrate (main body) of high density, high strength ultrafine grained isotropic graphite, by, for example, isostatic or vibrational molding, machining the substrate to form the mold cavity, and coating the mold cavity with pyrolytic graphite via a chemical deposition process. The molds may be used to make various metallic alloys such as nickel, cobalt and iron based superalloys, stainless steel alloys, titanium alloys and titanium aluminide alloys into engineering components by melting the alloys in a vacuum or under a low partial pressure of inert gas and subsequently casting the melt in the graphite molds under vacuum or low partial pressure of inert gas.

Abstract: A hydrogen storage material which is characterized by having, as a cast alloy, a flaky or similar shape with a thickness of 50 to 500 &mgr;m and showing such crystallite orientation that the X-ray diffraction pattern has an intensity ratio of plane indices (002)/(200) of 2 to 10 as measured with the cooled surface of the flaky cast alloy being in parallel with a mount, and a process of producing the same.

Abstract: Directionally solidified columnar grain nickel base alloy casting consisting essentially of, in weight %, of about 11.6% to 12.70% Cr, about 8.50 to 9.5% Co, about 1.65% to 2.15% Mo, about 3.5% to 4.10% W, about 4.80% to 5.20% Ta, about 3.40 to 3.80% Al, about 3.9% to 4.25% Ti, about 0.05% to 0.11% C, about 0.003% to 0.015% B, balance essentially Ni and having substantial transverse stress rupture strength and ductility as compared to a similar casting without boron present.

Abstract: A single crystal casting is cast from a nickel base superalloy including Cr, Co, Mo, W, Ta, Al, Ti, Re and Hf as alloying elements with C increased effective to substantially reduce formation of a solidification-driven, as-cast eutectic/secondary phase scale metallurgically bonded to the casting when the alloy is cast as a single crystal and to reduce recrystallized grains when the casting is solution heat treated.

Abstract: Methods for making various nickel based superalloys into engineering components such as rings, tubes and pipes by melting of the alloys in a vacuum or under a low partial pressure of inert gas and subsequent centrifugal casting of the melt in the graphite molds rotating along its own axis under vacuum or low partial pressure of inert gas are provided. The molds have been fabricated by machining high density, high strength ultrafine grained isotropic graphite, wherein the graphite has been made by isostatic pressing or vibrational molding.

Abstract: A hydrogen storage material which is characterized by having, as a cast alloy, a flaky or similar shape with a thickness of 50 to 500 &mgr;m and showing such crystallite orientation that the X-ray diffraction pattern has an intensity ratio of plane indices (002)/(200) of 2 to 10 as measured with the cooled surface of the flaky cast alloy being in parallel with a mount, and a process of producing the same.

Abstract: A method for promoting the environmental resistance of nickel, iron and cobalt-base superalloys of the type alloyed to develop a protective oxide scale. The method entails a technique for removing sulfur during or subsequent to the casting operation. The method generally includes casting a superalloy article in a mold cavity, and then heat treating the article while surfaces of the article are in contact with a compound containing a sulfide and/or oxysulfide-forming element, such as yttria, calcium oxide, magnesia, scandia, ceria, hafnia, zirconia, titania, lanthana, alumina and/or silica. The heat treatment is performed at a temperature sufficient to cause sulfur within the superalloy article to segregate to the surfaces of the article and react with the sulfide-forming element, thereby forming sulfides at the interface with the compound.

Abstract: A description follows of an article based on a nickel-chromium-silicon metal alloy, including microcrystalline borides, obtained by the rapid solidification and subsequent thermal treatment of a nickel-chromium-boron-silicon metal alloy comprising from 39.0 to 69.4 atom % of nickel, from 11.8 to 33.9 atom % of chromium, from 7.6 to 27.4 atom % of boron and from 7.6 to 17.5 atom % of silicon. The above article is preferably a tape or a sheet or a fiber having high mechanical properties and is particularly resistant to oxidation.

Abstract: Medium- and high-density articles are formed from melting and casting alloys containing tungsten, iron, nickel and optionally manganese and/or steel. In some embodiments, the articles have densities in the range of 8-10.5 g/cm3, and in other embodiments, the articles have densities in the range of 10.5-15 g/cm3. In some embodiments, the articles are ferromagnetic, and in others the articles are not ferromagnetic. In some embodiments, tungsten forms the largest weight percent of the alloy, and in other embodiments the alloy contains no more than 50 wt % tungsten. In some embodiments, the articles are shell shot.

Abstract: Improved targets for use in DC magnetron sputtering of nickel or like ferromagnetic face-centered cubic (FCC) metals are disclosed for forming metallization films having effective edge-to-edge deposition uniformity of 5% (3&sgr;) or better. Such targets may be characterized as having: (a) a homogeneous texture mix that is at least 20% of a <200> texture content and less than 50% of a <111>texture content, (b) an initial pass-through flux factor (%PTF) of about 30% or greater; and(c) a homogeneous grain size of about 200 &mgr;m or less.

Abstract: Method for producing a large, substantially hot tear-free superalloy gas turbine bucket useful in a large, land-based utility gas turbine engine, wherein a melt of a superalloy consisting essentially of, by weight: 13.7 to 14.3 percent chromium,  9.0 to 10.0 percent cobalt, 4.8 to 5.2 percent titanium, 2.8 to 3.2 percent aluminum, 2.8 to 4.3 percent tungsten, 1.0 to 1.5 percent molybdenum, 0.005 to 0.02  percent boron,   0 to 0.03 percent zirconium, 0.08 to 0.15 percent carbon, and 2.0 to 3.0 percent tantalum, or 1.0 to 1.5 percent columbium, or 2.0 to 2.5 percent hafnium, or 1.5 to 3.5 percent of a mixture of containing at least two of tantalum, columbium and hafnium, balance substantially nickel, is cast to produce said large gas turbine bucket.

Abstract: A hydrogen storage material which is an AB5 type hydrogen storage alloy having a CaCu5 type crystal structure represented by general formula: MmNiaMnbAlcCod wherein Mm denotes a misch metal, 4.0<a≦4.3, 0.25≦b≦0.4, 0.25≦c≦0.4, 0.3≦d≦0.5, and 5.05≦a+b+c+d≦5.25, or general formula: MmNiaMnbAlcCodXe wherein Mm denotes a misch metal, X is Cu and/or Fe, 4.0<a≦4.3, 0.25≦b≦0.4, 0.25≦c≦0.4, 0.3≦d≦0.5, 0<e≦0.1, and 5.05≦a+b+c+d+e≦5.25, characterized in that the lattice length on the c-axis is 404.9 pm to 405.8 pm.

Abstract: The process for manufacturing a metallic component, such as a wheel part for the rolling system of a vehicle, which includes, in an initial stage, forming the component of a metallic material in a semi-solid state and having a thixotropic structure, and in a subsequent cold-treatment stage, cold-treating at least part of said component by blasting it with projectiles with a view to plastic deformation thereof. A wheel in which a metallic disk is welded to a wheel rim and in which the metallic disk is obtained by the manufacturing process.

Abstract: A nickel/vanadium sputter target for depositing magnetic nickel is provided having high homogeneity, high purity and an ultra-low level of alpha emission. Source materials having high purity and alpha emissions of equal or less than 10−2 counts/cm2-hr are melted and cast under a vacuum and low pressure, hot or cold rolled, and heat treated to form a sputter target having an alpha emission of equal or less than 10−2counts/cm2-hr, and preferably less than 10−3 counts/cm2-hr. From this target may be deposited a thin film of magnetic nickel having an alpha emission equal or less than 10−2 counts/cm2-hr, preferably less than 10−3 counts/cm2-hr and more preferably less than 10−4 counts/cm2-hr.

Abstract: Large gas turbine blades made from separate cast segments of superalloys are disclosed. The turbine blade is designed such that bond lines between adjacent segments are placed in low stress regions of the blade. The cast superalloy segments of the blades are aligned and fitted together with specified tolerances. The turbine blade segments are then joined by transient liquid phase bonding, followed by a controlled heat treatment which produces the desired microstructure in the bond region. The method allows for the production of large, high quality turbine blades by joining small, high quality cast superalloy sections, in comparison with prior attempts to cast large turbine blades as single pieces which have produced very low yields and high individual component costs.

Abstract: A method of bonding cast superalloys is disclosed. The method includes the steps of casting separate superalloy component parts, machining the mating surfaces of the separate parts in a controlled manner to avoid recrystallization of the material and to ensure a tight fit between the parts, bonding the parts together, and thermally treating the bonded component. In a preferred embodiment, the component is a turbine blade for a land-based gas turbine.

Abstract: An Ni-base heat resistant alloy, has a composition which contains, by weight, Cr: from 12.0 to 14.3%, Co: from 8.5 to 11.0%, Mo: from 1.0 to 3.5%, W: from 3.5 to 6.2%, Ta: from 3.0 to 5.5%, Al: from 3.5 to 4.5%, Ti: from 2.0 to 3.2%, C: from 0.04 to 0.12%, B: from 0.005 to 0.05%, and the balance substantially Ni and inevitable impurities. A large-size casting, as well as a large-size turbine blade, having a columnar crystalline Ni-base heat-resistant alloy formed from the Ni-base heat-resistant alloy, have sound cast surfaces and a sound internal structure.

Abstract: A rare earth metal-nickel hydrogen storage alloy of a composition represented by the formula: RNiaMnbCocAldXe (R stands for one or more rare earth elements including Sc and Y, not less than 95 atom % of which is one or more elements selected from the group consisting of La, Ce, Pr, and Nd; X stands for one or more elements selected from the group consisting of Fe, Cu, Zn, V, and Nb; a, b, c, d, and e satisfy the relations of 3.9≦a<6.0, 0.45≦b<1.5, 0.01≦c<0.3, 0.4≦d≦1, 0≦e≦0.2, and 5.2≦a+b+c+d+e≦7.5), the alloy having a matrix of CaCu5 structure, and a Mn-rich secondary phase of 0.3 to 5 &mgr;m finely dispersed in the matrix at surface ratio of 0.3 to 7%; a method for producing the same; and an anode for a nickel-hydrogen rechargeable battery containing as anode material the hydrogen storage alloy and an electrically conductive material.

Abstract: Machineable nickel base alloy casting, consisting essentially of, in weight %, about 12.5% to 15% Cr, about 9.00% to 10.00% Co, about 3.70% to 4.30% Mo, about 3.70% to 4.30% W, about 2.80% to 3.20% Al, about 4.80% to 5.20% Ti, about 0.005% to 0.02% B, up to about 0.10% Zr, and balance essentially Ni and carbon below about 0.08 weight % to improve machinability while retaining alloy strength properties after appropriate heat treatment.

Abstract: A Ni-base directionally solidified alloy casting is produced by casting a Ni-base directionally solidified alloy having a composition of 10 to 14 wt. % Co, 2 to 3 wt. % Cr, 1.5 to 2.5 wt. % Mo, 5 to 6.5 wt. % W, 5.7 to 6.5 wt. % Al, 5.5 to 6.5 wt. % Ta, 4.5 to 5.0 wt. % Rd, 0.01 to 1.5 wt. % Hf, 0.01 to 0.30 wt. % C, 0.01 to 0.03 wt. % B, and the balance of Ni and inevitable impurities. The Ni-base directionally solidified alloy casting is subjected to a solid solution treatment process at a temperature in the range of 1250 to 1300° C. Then the Ni-base directionally solidified alloy casting is subjected to a two-stage aging process for aging the Ni-base directionally solidified alloy casting at a temperature in the range of 750 to 1200° C.

Abstract: Reversible hydrogen storage alloys and methods and electrodes formed therefrom for nickel metal hydride batteries, in which the alloys are quenched from a melt at cooling rates selected to provide a high degree of disorder with an optimum local environment.

Abstract: A process for cutting coked metal includes cutting with a flame or by electrowelding after the coked metal has been heated sufficiently to relieve stresses in the metal.

Abstract: The invention relates to a nickel-base single-crystal superalloy applied to parts for industrial gas turbine or the like such as turbine rotor blade and stator blade which are used at high temperatures, a method for manufacturing the same, and gas turbine parts prepared from such nickel-base single-crystal superalloys, and more particularly the invention provides a nickel-base single-crystal superalloy consisting essentially of, in percentages by weight, 5% to 10% cobalt, 4.7% to 6% chromium, more than 2.0% to less than 3.5% molybdenum, 7.5% to 10% tungsten, 5% to 6% aluminum, 0.1% to 2% titanium, 4% to 5.5% tantalum, 1% to 4% rhenium, 0.01% to 0.2% hafnium, the balance being nickel and incidental impurities, which is excellent in high-temperature strength and high-temperature corrosion resistance, and further excellent in structural stability even in a long time use.

Abstract: Castings based on the nickel aluminide intermetallic alloy IC-221M were melted and poured with an addition of enough molybdenum to bring its concentration to 5 weight %. This resulted in a minimization or elimination of the nickel-zirconium eutectic phase in the dies machined and prepared from these castings. The benefit of eliminating or minimizing the nickel zirconium eutectic phase with the addition of measurable amounts of molybdenum (Mo) to the nickel aluminide (Ni.sub.3 Al) alloy is the increase in the useful service life of the tooling made from it; thus providing the advantages of increased productivity, enhanced quality and reduced costs in a manufacturing setting. Heat treatment of the dies machined and prepared from these castings was also undertaken. The heat treatment regimen includes solution treatment at 2100.degree. F. for 24 hours and aging from between 1150.degree. F. and 1300.degree. F. for between 12 to 24 hours.

Abstract: Heat treated, spray formed articles are disclosed which exhibit crack growth rates and resistance to stress rupture comparable to corresponding, forged articles. The articles are first formed by depositing molten metal droplets, e.g., of IN 718, on a substrate to form a rough article. The articles are HIP'ed and then processed by heat treating, which includes solution, stabilization and precipitation heat treatments. The resultant articles have fine average grain sizes compared to forged and conventionally heat treated material, as well as yield and tensile strengths comparable to forged material. Importantly, the articles also exhibit low crack growth rates and stress rupture resistance, e.g., comparable to forged material, and have an isotropic microstructure. The articles can be used in place of forged articles.

Abstract: A method of producing an age precipitation-containing rare earth metal-nickel alloy of AB.sub.5 type having a composition represented by a formula (1)R(ni.sub.1-x M.sub.x).sub.5+y (1)wherein R stands for a rare earth element including Y or mixtures thereof, M stands for Co, Al, Mn, Fe, Cu, Zr, Ti, Mo, W, B, or mixtures thereof, x satisfies the relation of 0.05.ltoreq.x.ltoreq.0.5, and y satisfies the relation of -0.45.ltoreq.y.ltoreq.0.45, the alloy containing a precipitated phase having an average size of 0.1 to 20 .mu.m as measured along the longitudinal axis is disclosed. The method includes the steps of subjecting a raw alloy material having a composition represented by the formula (1) to a solid solution treatment at a temperature of not less than 1000.degree. C. and ageing the alloy material subjected to said solution heat treatment at a temperature T (.degree. C) of not less than 700.degree. C. and less than 1000.degree. C.

Abstract: An Ni-base heat resistant alloy, has a composition which contains, by weight, Cr: from 12.0 to 14.3%, Co: from 8.5 to 11.0%, Mo: from 1.0 to 3.5%, W: from 3.5 to 6.2%, Ta: from 3.0 to 5.5%, Al: from 3.5 to 4.5%, Ti: from 2.0 to 3.2%, C: from 0.04 to 0.12%, B: from 0.005 to 0.05%, and the balance substantially Ni and inevitable impurities. A large-size casting, as well as a large-size turbine blade, having a columnar crystalline Ni-base heat-resistant alloy formed from the Ni-base heat-resistant alloy, have sound cast surfaces and a sound internal structure.

Abstract: Castings based on the nickel aluminide intermetallic alloy IC-221M were melted and poured with an addition of enough molybdenum to bring its concentration to 5 weight %. This resulted in a minimization or elimination of the nickel-zirconium eutectic phase in the dies machined and prepared from these castings. The benefit of eliminating or minimizing the nickel zirconium eutectic phase with the addition of measurable amounts of molybdenum (Mo) to the nickel aluminide (Ni.sub.3 Al) alloy is the increase in the useful service life of the tooling made from it; thus providing the advantages of increased productivity, enhanced quality and reduced costs in a manufacturing setting. Heat treatment of the dies machined and prepared from these castings was also undertaken. The heat treatment regimen includes solution treatment at 2100.degree. F. for 24 hours and aging from between 1150.degree. F. and 1300.degree. F. for between 12 to 24 hours.

Abstract: A nickel base superalloy, having either columnar or equiaxed grain structure, which has significantly improved resistance to hydrogen embrittlement, and to fatigue in air. The material is processed so as to be essentially free of script type carbides, .gamma./.gamma.' eutectic islands and porosity. The processing includes heat treating above the .gamma.' solvus temperature to solution the script type carbides and eutectic islands, followed by HIP to eliminate the porosity.

Abstract: A rare earth metal-nickel hydrogen storage alloy having a composition represented by the formula (1)(R.sub.1-x L.sub.x)(Ni.sub.1-y M.sub.y).sub.z (1)(R: La, Ce, Pr, Nd; L: Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, Sc, Mg, Ca; M: Co, Al, Mn, Fe, Cu, Zr, Ti, Mo, Si, V, Cr, Nb, Hf, Ta, W, B, C; 0.01.ltoreq.x.ltoreq.0.1; 0.ltoreq.y.ltoreq.0.5; 4.5.ltoreq.z.ltoreq.5.0), the alloy including in an amount of not less than 10 volume % and less than 95 volume % thereof crystals each containing not less than 2 and less than 20 antiphase boundaries extending perpendicular to C-axis of a crystal grain of the alloy per 20 nm along the C-axis, not less than 60% and less than 95% of added amount of said element represented by L in the formula (1) being arranged in antiphase areas, a method for producing the same, and an anode for a nickel-hydrogen rechargeable battery. The anode for a nickel-hydrogen rechargeable battery can improve initial activity, battery capacity, and battery life all at the same time.

Abstract: There is provided a hydrogen occluding alloy exhibiting high absorption and desorption speeds. A hydrogen occluding alloy comprising as an overall composition: 25 to 45 weight % Zr+Hf, wherein the Hf comprises not more than 4%, 1 to 12 weight % Ti, 10 to 20 weight % Mn, 2 to 12 weight % V, 0.6 to 5 weight % rare earth elements, and a balance Ni (of which content is not less than 25 weight %) and unavoidable impurities, and basically having a three-phase structure consisting of: a main phase which constitutes the matrix of the alloy and which is made of a Zr--Ni--Mn based alloy, a dispersed granular phase made of a rare earth elements--Ni type alloy distributed along the grain boundary of the main phase, and a flaky phase which is made of a Ni--Zr type alloy attached to the dispersed granular phase and intermittently distributed along the grain boundary mentioned above.

Abstract: Directionally solidified superalloy components having a bulk sulfur concentration of less than 1 part per million by weight are provided by vacuum melting a charge to form a superalloy melt, desulfurizing the melt by contact with a calcium-bearing desulfurizing agent for a time to reduce sulfur concentration of the melt to less than 1 ppm by weight, casting the melt directly or following solidification and remelting in a ceramic investment mold, and directionally solidifying the melt as cast components without adverse bulk sulfur pick-up subsequent to desulfurization to provide castings having a sulfur content below 1 ppm, such as in the range of hundreds of parts per billion to provide significantly improved oxidation resistance.

Abstract: A process for preparing a Ni-based superalloy cast article includes (a) preparing an alloy charge composed of from 1.4 to 4.4 wt. % of Cr, from 3 to 8 wt. % of Co, from 5 to 7.5 wt. % of W, from 4.8 to 7.5 wt. % of Re, from 6 to 9 wt. % of Ta, from 4.8 to 6 wt. % of Al, from 0.1 to 0.5 wt. % of Nb, from 0.8 to 1.8 wt. % of Hf, from 0.05 to 0.1 wt. % of C, from 0.01 to 0.05 wt. % of Y, from 0.005 to 0.15 wt. % of B, and balance Ni, wherein the sum of W+Re is about 12 wt. %, the sum of Al+Ta+Hf+Nb ranges from 13.6 to 15.6 wt. %, and the sum of W+Re+Ta+Hf+Nb ranges from 20.2 to 22.8 wt.

Abstract: Columnar grain and single crystal nickel base superalloys are heat treated to provide a damage tolerant microstructure. The microstructure contains large, irregularly shaped "barrier" .gamma.' particles interspersed in an ordered array of smaller cuboidal .gamma.' particles in a .gamma. phase matrix. The barrier particles interrupt the progression of cracks through the microstructure. The invention process includes solutioning the .gamma.' phase, cooling slowly to a temperature about 50.degree. F. to 150.degree. F. (28.degree. C. to 83.degree. C.) below the .gamma.' solvus temperature, further cooling at a rate of at least about 100.degree. F. (56.degree. C.) per minute to less than 1000.degree. F. (538.degree. C.), reheating to 1975.degree. F. to 2000.degree. F. (1079.degree. C. to 1093.degree. C.) and holding for about four to six hours, cooling at 100.degree. F. (56.degree. C.) per minute to less than 1000.degree. F. (538.degree. C.), and heating to 1600.degree. F..+-.25.degree. F. (871.degree. C..+-.14.

Abstract: The present invention provides a hydrogen occluding alloy exhibiting high hydrogen absorption and desorption rates, and excellent initial activation in practical use, and a method of making it. There is provided a hydrogen occluding alloy having a composition comprising, by wt %, 32 to 38% of rare earth elements essentially consisting of La and/or Ce, 0.5 to 3.5% of Al, 0.5 to 10% of Mn, 0.005 to 0.5% of hydrogen, optionally 0.1 to 17% of Co, and the balance being Ni and unavoidable impurities; wherein the alloy has a microstructure characterized in that fine rare earth element hydride is dispersively distributed in a matrix having a CaCu.sub.5 -type crystal structure in a ratio of 0.5 to 20% by area. There are also provided electrodes and batteries containing such alloys, and methods of making and using such electrodes and batteries.