Abstract: A method for preparation of an aluminum based alloy composition comprising forming by spray deposition, a solid body having a composition comprising, by weight, 5.5 to 8.45% Zn, 2 to 3.5% Mg, 0.5 to 2.5% Cu, 0.1 to 0.5% Zr, 0.3 to 0.6% Cr, 0.3 to 1.1% Mn, up to 0.5% Fe, up to 0.5% Si, other elements <0.05% each, up to 0.15% total, and balance Al. The body is converted to a worked product at 300.degree. to 450.degree. C., optionally converted cold, and heat treated in a series of steps comprising dissolution, quenching and annealing in a T6 or T7 state.

Abstract: Process for economically obtaining a magnesium alloy having improved mechanical characteristics and in particular a breaking strength of at least 290 MPa and an elongation at break of at least 5%, by spraying and deposition in solid form to provide an ingot with the following weight composition: Al 2-9%; Zn 0-4%; Mn 0-1%; Ca 0.5-5%; RE 0-4% (rare earths); and, with the main impurities, the remainder being magnesium. The ingot undergoes a consolidation treatment by thermal deformation at between 200.degree. and 250.degree. C. The alloys obtained by the process are constituted by a homogeneous magnesium matrix with the grain size between 3 and 25 .mu.m and particles of intermetallic compounds.

Abstract: The invention concerns aluminum based alloys of the 7000 series with a high Young'3 s modulus (E.gtoreq.74 GPa), high mechanical strength (R.sub.0.2 .gtoreq.530 MPa in the longitudinal direction), good tenacity (KIC, longitudinal direction .gtoreq.20 MPa.sqroot.m ), and good resistance to corrosion under tension (.sigma..gtoreq.250 MPa in the short transverse direction, durability .gtoreq.30 days ASTM standard G 38-73. The alloy according to the invention is of the following composition by weight: from 5.5 to 8.45% of Zr; from 2 to 3.5% Mg; from 0.5 to 2.5% up to 0.5% Fe; up to 0.5% Si; other elements .ltoreq.0.05% each; and up to 0.15% in all with 0.1.ltoreq.Zr.ltoreq.0.5% 0.3.ltoreq.Cr.ltoreq.0.6%; and 0.3.ltoreq.Mn.ltoreq.1.1%. It is preferably worked by the following process steps: a solid body of the composition claimed above is formed by spray deposition; the body is converted to a worked product, at from 300.degree. to 450.degree. C.

Abstract: A process for the production of a series 7000 aluminum alloy (Al-Zn-Cu-Mg) with a high level of mechanical strength and good ductility, by spray deposition. The object is the production of aluminum alloys having an ultimate stress.gtoreq.800 MPa and an elongation.gtoreq.5%, as well as the production of alloys which are reinforced by ceramic particles. According to the process, a solid alloy is formed by spray deposition, the alloy is transformed in the hot condition at between 300.degree. and 450.degree. C. and possibly in the cold condition, and the transformed alloy is subjected to solution treatment, quenching and aging.

Abstract: The invention relates to an aluminum alloy component retaining a good fatigue strength when used hot. The alloy contains by weight 11 to 26% silicon, 2 to 5% iron, 0.5 to 5% copper, 0.1 to 2% magnesium, 0.1 to 0.4% zirconium and 0.5 to 1.5% manganese, the alloy in the molten state is subjected to a fast solidification means, bringing it into the form of parts of components and optionally subjecting the latter to a heat treatment at between 490.degree. and 520.degree. C., followed by water hardening and annealing at between 170.degree. and 210.degree. C. Components formed of the alloy are used more particularly as rods, piston rods and pistons.

Abstract: The invention relates to a process for the production of aluminum alloy components retaining a good fatigue strength when used hot.This process consists of producing an alloy containing by weight 11 to 26% silicon, 2 to 5% iron, 0.5 to 5% copper, 0.1 to 2% magnesium, 0.1 to 0.4% zirconium and 0.5 to 1.5% manganese, subjecting the alloy in the molten state to a fast solidification means, bringing it into the form of parts or components and optionally subjecting the latter to a heat treatment at between 490.degree. and 520.degree. C., followed by water hardening and annealing at between 170.degree. and 210.degree. C.These components are used more particularly as rods, piston rods and pistons.

Abstract: The invention relates to aluminium alloy parts having an improved fatigue strength and to their production process. These parts are made from an alloy containing by weight 11 to 22% silicon, 2 to 5% iron, 0.5 to 4% copper, 0.2 to 1.5% magnesium and having the characteristic of containing 0.4 to 1.5% zirconium. The process for obtaining the same consists of subjecting the alloy in the molten state to fast solidification, shaping, a heat treatment at between 480.degree. and 530.degree. C., hardening with water and tempering at between 150.degree. and 200.degree. C. These parts are more particularly used as rods and piston pins.

Abstract: A process for the production by power metallurgy of a material based on an aluminum alloy, a solid lubricant and at least one ceramic is disclosed. The process is characterized by using a ceramic in powder form with a granulometry of between 1 and 10 .mu.m.This invention finds application in the manufacture of components which are subjected to friction, in particular under hot condition, such as engine liners. These components provide an optimum compromise coefficient of friction and resistance to seizure and wear.