Abstract: Aluminum and aluminum alloy melts are purified by removing entrained gaseous impurities and solid particulate impurities, primarily aluminum oxides, by bubbling a non-corrosive intimate mixture of sulfur hexafluoride in an inert gas. Magnesium levels, if present, are not significantly reduced. The process is reliable and the gas mixture safe for aluminum purifying operations and procedures.

Abstract: Aluminium alloys particularly useful as sacrificial anodes and processes for the preparation thereof are disclosed. The alloys of the invention exhibit a range of superior properties enabling high performance and reliability under a wide range of environmental conditions.

Abstract: Problems are caused by stress corrosion cracking and exfoliation cracking in the heat-affected zones adjacent welds in structure of welded components formed of Al alloys, particularly of the 7000 series but also of the 5000 series. The invention seeks to overcome these by the use of Al-Mg welding wire containing 0.01-0.5% Ga and/or In and/or Sn, the composition being chosen such that the weld bead has a potential at least as electronegative as the components and preferably in the range -1200 to -1300 mV with reference to a standard calomel electrode. To prevent diffusion of Ga/In/Sn, the components may be pre-coated e.g. by using a double-pass welding technique.

Abstract: An aluminium alloy suitable as a material for superplastic forming contains0.8-2.5% or iron,3.5-6.0% of magnesium,0.1-0.6% of manganese,0.05-0.5% of zirconium,at most 6.0% of zinc,at most 3.0% of copper,at most 0.3% of silicon,at most 0.05% of titanium andat most 0.05% of chromium,the remainder being aluminium of commercial purity.The alloy can be processed to give superplastically formable sheets without separate thermomechanical pretreatment.

Abstract: An alluminum alloy composition represented by the following general formula (I):Al.sub.a Mg.sub.b Ni.sub.c Mn.sub.d Si.sub.e Cu.sub.f Fe.sub.g Ti.sub.h Zn.sub.i B.sub.k Zr.sub.l (I)whereinb=about 2-8 wt %c=0--about 7 wt %d=0--about 3.0 wt %e=0--about 1.0 wt %f=0--about 1.0 wt %g=0--about 0.5 wt %h=0--about 0.3 wt %i=0--about 0.3 wt %j=0--about 0.1 wt %k=0--about 0.1 wt % andl=0--about 0.3 wt %; provided thatc+d.gtoreq.about 0.5 wt %, anda is balance.

Abstract: An aluminum alloy for the substrate of magnetic disk is disclosed, wherein 2 to 6 wt % of Mg and further either one or two of Cu within a range of 0.12 to 2.0 wt % and Zn within a range of 0.28 to 7.0 wt % are contained, and the remainder comprises of Al and inevitable impurities.

Abstract: Disclosed is an aluminum-lithium alloy containing a predetermined amount of lanthanides which provides the alloy with an improved combination of strength and fracture toughness relative to a baseline alloy not containing lanthanides but otherwise having the alloy's composition.

Abstract: Aluminum brazing alloys for assembling aluminum heat exchangers by brazing which consist essentially of 4.5 to 13.5% of Si, from 0.005% to less than 0.1% of Sr and the balance essentially Al and, further, optionally may contain at least one element selected from the group consisting of 0.3 to 3.0% of Mg, 2.3 t0 4.7% of Cu and 9.3 to 10.7% of Zn. The aluminum brazing alloys provide high strength brazed joints with highly refined microstructure and brazing operation can be performed in a good condition without causing any detrimental cavity. Such excellent properties make the brazing alloys especially suited for the fabrication of superhigh pressure heat exchangers.

Abstract: In composition of an Al-base substrate for magnetic recording media, additional inclusion of at least one of specified amount of Cr, Mg and Zn greatly improves recording and reproducing function of the product.

Abstract: An aluminum alloy having excellent properties including extrusibility, forgeability and malleability, the alloy containing 4.0 to 12% of zinc, 0.3 to 5.0% of magnesium, and one or more elements selected from the rare earth elements, wherein the content of the selected element is in the range of 0.5 to 10.0%, and the balance being substantially aluminum and unavoidable impurities.

Abstract: An improved aluminum base alloy product is disclosed, the product comprising 0 to 3.0 wt. % Cu, 0 to 1.5 wt. % Mn, 0.1 to 4.0 wt. % Mg, 0.8 to 8.5 wt. % Zn, at least 0.005 wt. % Sr, max. 1.0 wt. % Si, max. 0.8 wt. % Fe and max. 0.45 wt. % Cr, 0 to 0.2 wt. % Zr, the remainder aluminum and incidental elements and impurities.

Abstract: Computer memory disk substrates which can be age hardened to a high yield strength after thermal flattening and yet are essentially free of magnesium silicide constituents detrimental to surface smoothness are prepared by replacing a portion of the magnesium usually includes in high amounts as an alloying element with zinc.

Abstract: Aluminum alloys having compositions within the ranges (in Wt %) 0.2 to 3 lithium -0 to 4 magnesium -0.4 to 5 zinc -0 to 2 copper -0 to 0.2 zirconium -0 to 0.5 manganese -0 to 0.5 nickel -0 to 0.4 chromium-balance aluminum. The alloys are precipitation hardenable and exhibit a range of properties, according to heat treatment, which made them suitable for engineering applications where light weight and high strength are necessary.

Abstract: Alloys for galvanic anode of this invention include those which contain zinc of 1.0 to 10%, magnesium of 0.1 to 6%, indium of 0.01 to 0.04%, tin of 0.005 to 0.15%, silicon of 0.09 to 1.0%, and calcium or barium or both of 0.005 to 0.45%, the balance being aluminum, and those which contain zinc of 1.0 to 10%, indium of 0.01 to 0.05%, magnesium of 0.05 to 6%, silicon of 0.07 to 1.0%, and calcium or barium or both of 0.01 to 0.5%, the balance being aluminum. The above mentioned alloys of this invention exhibit an exceedingly large output of electric current as compared with conventional alloys, hold the dissolving surfaces uniformly and are exceedingly useful for anticorrosion of large-sized steel structures.

Abstract: A process and a device for manufacturing an extruded section of an aluminum alloy containing additions of boron or compounds thereof are intended to simplify the manufacture of aluminum alloy sections for use in nuclear science and technology. Using a boron-containing aluminum-based raw material a section is to be formed such that its design ensures adequate stability and at the same time the necessary screening properties. To this end a billet having a core of aluminum alloy with additions of boron or the like and a mantel surrounding the same is manufactured and hot formed by extrusion, such that, using the molten metal route or powder metallurgy, a blank of aluminum alloy of particular alloy groups with additions of boron or its compounds at a concentration of 0.05 to 50 wt % is taken as the starting basis.

Abstract: Powder metallurgy products of high tensile strength are formed in a pore-free state by a novel process which entirely avoids the use of canisters. An open-pore specimen is purged with depurative gas, backfilled with a reactive gas and, while still immersed in the reactive gas, compressed isostatically to an extent necessary to close the pores. The specimen may then be compressed to full density without the need for either high vacuum or a depurative or reactive gas atmosphere.

Abstract: A tin-containing aluminum alloy is usually pressure-welded to a backing steel plate and used as a bearing. This bearing, however, is defective in that aluminum crystal grains and tin precipitates are coarsened in the alloy structure and the high temperature hardness and fatigue-resistant strength of the bearing alloy are reduced.The present invention provides an aluminum alloy comprising 2.5 to 25% by weight of tin, 0.5 to 8% by weight of zinc and 1 to 7% by weight of at least one element selected from the group consisting of silicon, chromium, manganese, nickel, iron, zirconium, molybdenum, cobalt, tungsten, titanium, antimony, niobium, vanadium, cerium, barium and calcium, with the balance being substantially aluminum. In the aluminum alloy of the present invention 0.1 to less than 1% by weight of chromium may be incorporated of 1 to less than 1% by weight of chromium may the like. The alloy of the present invention is effectively used as a bearing for a crank shaft of an automobile or the like.