Abstract:
The invention relates to a process for manufacturing rolled products made of an aluminium-based alloy comprising 4.2 to 4.6% by weight of Cu, 0.8 to 1.30% by weight of Li, 0.3 to 0.8% by weight of Mg, 0.05 to 0.18% by weight of Zr, 0.05 to 0.4% by weight of Ag, 0.0 to 0.5% by weight of Mn, at most 0.20% by weight of Fe + Si, less than 0.20% by weight of Zn, at least one element chosen from Cr, Se, Hf and Ti, the amount of said element, if it is chosen, being from 0.05 to 0.3% by weight for Cr and for Se, 0.05 to 0.5% by weight for Hf and 0.01 to 0.15% by weight for Ti, the other elements being at most 0.05% by weight each and 0.15% by weight in total, the remainder being aluminium, comprising the steps of smelting, casting, homogenization, rolling with a temperature greater than 400°C, solution heat treating, quenching, tensioning between 2 and 3.5% and tempering. The invention also relates to the rolled products obtained by this process, which have a favourable compromise of properties between mechanical strength in compression and in tension and toughness. The products according to the invention are especially of use for the manufacture of upper wing skin.
Abstract:
L'invention concerne un produit corroyé tel qu'un produit filé, laminé et/ou forgé, en alliage à base d'aluminium comprenant, en % en poids, Cu : 3,0 - 3,9; Li : 0,8 - 1,3; Mg : 0,6 - 1,0; Zr : 0,05 - 0,18; Ag : 0,0 - 0,5; Mn : 0,0 - 0,5; Fe + Si ≤ 0,20; Zn ≤ 0,15;au moins un élément parmi Ti : 0,01-0,15; Sc : 0,05 - 0,3; Cr : 0,05 - 0,3; Hf : 0,05 - 0, 5; autres éléments ≤ 0,05 chacun et ≤ 0,15 au total, reste aluminium. L'invention concerne également le procédé de fabrication de ce produit. Les produits selon l'invention sont particulièrement utiles pour réaliser des produits épais en aluminium destinés à réaliser des éléments de structure pour l'industrie aéronautique.
Abstract:
The invention relates to a clad sheet product comprising a core layer and at least one clad layer wherein the core comprises an alloy of the following composition in weight %: Mg 0.90 - 1.40; Si 0.90 - 1.40; Cu 0.75 - 1.40; Mn
Abstract translation:本发明涉及一种包覆芯片产品,其包括芯层和至少一个包覆层,其中芯包含以重量%以下组成的合金:Mg 0.90-1.40; Si 0.90-1.40; Cu 0.75〜1.40; Mn <0.40; Cr <0.20; Fe <0.30; 其他<0.05,总共<0.15; 平衡铝; 并且所述至少一个包覆层包含以重量%计的以下组成的合金:Mg 0.30-0.70; Si 0.30-0.80; Cu <0.30; Mn <0.30; Fe <0.30; 其他<0.05,总共<0.15; 平衡铝。 此外,本发明涉及一种生产包覆层产品的方法,包括芯层和至少一个覆层,其中芯包含以重量%以下组成的合金:Mg 0.90-1.40; Si 0.90-1.40; Cu 0.75〜1.40; Mn <0.40; Cr <0.20; Fe <0.30; 其他<0.05,总共<0.15; 平衡铝,并且所述至少一个包覆层包含以重量%的以下组成的合金:Mg 0.30-0.70; Si 0.30-0.80; Cu <0.30; Mn <0.30; Fe <0.30; 其他<0.05,总共<0.15; 包括以下步骤:制备具有一个芯层和至少一个包覆层的复合锭; 进行均质处理; 将均质复合锭热轧成热轧板材; 将热轧板材冷轧成冷轧板材; 进行溶解处理; 淬火冷却后的冷轧板材,然后进行预熟化,缓慢冷却至室温。
Abstract:
Disclosed is a high damage tolerant Al-Cu alloy rolled product of the AA2000 series having a high toughness and an improved fatigue crack growth resistance, including the following composition (in weight percent) Cu 3.8 - 4.7, Mg 1.0 -1.6, Zr 0.06 - 0.18, Cr 0 - 0.50, Fe ≤ 0.15, Si ≤ 0.15, the balance essentially aluminium and incidental elements and impurities, wherein the product comprises Mn-containing dispersoids and Zr-containing dispersoids. There is also disclosed a method for producing a rolled high damage tolerant AI-Cu alloy product having a high toughness and an improved fatigue crack growth resistance, and applications of that product as a structural member of an aircraft.
Abstract:
This invention relates to the field of metallurgy, in particular to high strength weldable alloy with low density, of aluminium-copper-lithium system. Said invention can be used in air- and spacecraft engineering. The suggested alloy comprises copper, lithium, zirconium, scandium, silicon, iron, beryllium, and at least one element from the group including magnesium, zinc, manganese, germanium, cerium, yttrium, titanium. Also there is suggested the method for fabrication of semiproducts' which method comprising heating the as-cast billet prior to rolling, hot rolling, solid solution treatment and water quenching, stretching and three-stage artificial ageing.
Abstract:
A method of casting an aluminum base alloy which comprises providing a melt of an aluminum base alloy comprised of 4 to less than 5 wt.% Cu, max. 0.1 wt.% Mn, 0.15 to 0.55 wt.% Mg, max. 0.4 wt.% Si, max. 0.2 wt.% Zn, up to 0.4 wt.% Fe, the balance comprised of aluminum, incidental elements and impurities. The dissolved Ti in the melt is maintained in the range of about 0.005 to 0.05 wt.% to improve the resistance of the alloy to hot cracking. A nucleating agent added to the melt to provide an undissolved nucleating agent therein, in the range of 0.002 to 0.1 wt.% for grain refining. The said alloy is solidified to provide a cast product having a grain size of less than 125 microns and free of hot cracks. The figure illustrates a scale drawing of the casting used to evaluate the new grain refining practice and locations where cracks were observed (1, 2, 3, 4).
Abstract:
The present invention is directed to highly controlled alloy composition relationship of a high purity A1-Mg-Cu alloy within the 2000 series aluminum alloys as defined by the Aluminum Association, wherein significant improvements are revealed in fracture toughness through plane strain, fracture toughness through plane stress, fatigue life, and fatigue crack growth resistance.
Abstract:
An aluminium based alloy having a composition within the following ranges, all of the ranges being in weight percent: lithium 2.0 to 2.8, magnesium 0.4 to 1.0, copper 2.0 to 3.0, manganese 0.7 to 1.2, zirconium up to 0.2 and the balance aluminium, save for incidental impurities and up to 2.0 in total of one or more grain controlling elements to provide microstructural optimisation and control.
Abstract:
An anode for an aluminum electrochemical cell includes an aluminum alloy having a particle size of 1 micrometer to 60 micrometers, the aluminum alloy including 98 weight percent to 99.999 weight percent of aluminum and 0.001 weight percent to 2 weight percent of a dopant containing magnesium, gallium, tin, or a combination thereof, each based a total weight of the aluminum alloy, and wherein iron, copper, silicon, zinc, and nickel, if present in the aluminum alloy, is each independently contained in an amount of less than 0.001 weight percent, based on a total weight of the aluminum alloy; and wherein the anode has a porosity of 0.1% to 60%, based on a total volume of the anode.