Provided is a method of estimating a solid solution amount of Mg for estimating a change with time of the solid solution amount of Mg which is an example of additive elements in an aluminum alloy. The method of estimating the solid solution amount of Mg includes a step of identifying a precipitate of the aluminum alloy with an equilibrium diagram prepared by simulation based on the CALPHAD method. The method of estimating the solid solution amount of Mg further includes a step of estimating the change with time of the solid solution amount of Mg from the identified precipitate with simulation based on the Langer-Schwartz theory and a numerical solution with the Kampmann-Wagner method.

Provided is a method of estimating a solid solution amount of Mg for estimating a change with time of the solid solution amount of Mg which is an example of additive elements in an aluminum alloy. The method of estimating the solid solution amount of Mg includes a step of identifying a precipitate of the aluminum alloy with an equilibrium diagram prepared by simulation based on the CALPHAD method. The method of estimating the solid solution amount of Mg further includes a step of estimating the change with time of the solid solution amount of Mg from the identified precipitate with simulation based on the Langer-Schwartz theory and a numerical solution with the Kampmann-Wagner method.

The present invention provides a photoluminescent aluminum alloy which exhibits high mechanical properties and which suppresses, to a high degree, the occurrence of color unevenness in cases where a tungsten-containing aluminum alloy die-cast material is subjected to anodization. Also provided is a photoluminescent aluminum alloy die-cast material produced using the photoluminescent aluminum alloy. This aluminum alloy contains 0.5-3.0 mass % of Mn, 0.3-2.0 mass % of Mg, 0.01-1.0 mass % of W and 1.0-3.0 mass % of Zn, with the remainder comprising aluminum and unavoidable impurities.

Provided is a brazed aluminum member brazed with a member formed of a brazing sheet, in which two or more grooves are provided on a surface of the brazed aluminum member in a fillet forming area, a groove depth (D1) of the grooves is 0.005 mm to 0.50 mm, a groove width (W1) of the grooves is 0.005 mm to 0.50 mm, a ratio (W1/D1) of the groove width (W1) to the groove depth (D1) is 10.00 or less, and a space (P1) between adjacent grooves is 0.00 mm to 0.30 mm. The present invention can provide an aluminum material and a method for producing a brazed product that can secure good brazing properties even when the clearance between the jointed members is large in the case where the aluminum material is brazed without using a flux.

Provided is a brazed aluminum member brazed with a member formed of a brazing sheet, in which two or more grooves are provided on a surface of the brazed aluminum member in a fillet forming area, a groove depth (D1) of the grooves is 0.005 mm to 0.50 mm, a groove width (W1) of the grooves is 0.005 mm to 0.50 mm, a ratio (W1/D1) of the groove width (W1) to the groove depth (D1) is 10.00 or less, and a space (P1) between adjacent grooves is 0.00 mm to 0.30 mm. The present invention provides an aluminum alloy material and a method for manufacturing a brazed body that can secure good brazing properties even when the clearance between the jointed members is large in the case where the aluminum material is brazed without using a flux.

The present invention relates to metalworking, in particular to producing vessels from non-heat-treatable aluminium alloys used for tanks and pressure vessels. Disclosed is a method of manufacturing a vessel, the method including: forming a tube by rolling at least one flat blank and abutting the edges thereof, friction stir welding the abutted edges and working at least a part of the welded tube into a shape of the vessel, wherein the flat blank is a sheet of a non-heat-treatable aluminium alloy preliminarily subjected to cold working with permanent deformation within the range of 0.5-15%, and said working of at least one part of the welded tube is hot working at a temperature of 230-520° C. The technical effect is a reduction in vessel weight, an increase in vessel strength, a uniform vessel strength and a reduction in the number of hot working cycles during manufacturing of the vessel. Further, the method provides reduced metal and time consumption in manufacturing a vessel from a non-heat-treatable aluminium alloy, low payload ratio, increased reliability and longer service life of the vessel produced using the method.

Disclosed are alloys for anodized-quality aluminum sheets with improved surface quality, and methods for making these sheets. The alloys are designed to minimize the formation of cathodic intermetallic particles that result in surface streaks of anodized sheet products formed from the alloys. Further, the alloys allow the incorporation of recycled scrap aluminum in anodized-quality sheets.

An aluminum alloy forging includes 0.30 mass % or more and 1.0 mass % or less of Cu; 0.63 mass % or more and 1.30 mass % or less of Mg; 0.45 mass % or more and 1.45 mass % or less of Si; the balance being Al and inevitable impurities, wherein the following relations are satisfied,

[Mg content]×1.587≥−4.1×[Cu content].sup.2+7.8×[Cu content]−1.9  (1)

[Si content]×2.730≥−4.1×[Cu content].sup.2+7.8×[Cu content]−1.9  (2)

and the ratio of the integrated intensity Q1 of the X-ray diffraction peak of the CuAl.sub.2 phase to the integrated intensity Q2 of the X-ray diffraction peak of the (200) plane of the Al phase obtained by the X-ray diffraction method, Q1/Q2, is 2×10.sup.−1 or less.

The present invention relates to techniques for producing 2024 and 7075 aluminum alloys by recycling waste aircraft aluminum alloys, which belong to technical fields for circular economy. The present invention develops techniques for obtaining the 2024 and 7075 aluminum alloys by subjecting waste aircraft aluminum alloys as raw materials to pretreatment, smelting, impurity removal, melt ingredient assay, ingredient adjustment, refining, and casting. Through utilizing the waste package aluminum alloys and the waste aluminum pop-top cans to adjust the ingredients, the waste aircraft aluminum alloys would be recycled at a lower cost without downgrading. The present invention has some advantages, such as low cost, and applicability for industrial production, as well as prominent economic benefit.

The present disclosure relates to a new family of 5000-series alloys that have high strength and can resist strength softening during stabilization and/or annealing treatment, after cold rolling, working or strain hardening, which are highly advantageous for food and beverage and automotive industries.