Abstract: A process for manufacturing a part comprising a formation of successive metal layers, superimposed on one another, wherein each layer is formed by the deposition of a filler metal, the filler metal being subjected to an input of energy so as to melt and to constitute said layer by solidifying, the process being characterized in that the filler metal is an aluminium alloy comprising the following alloy elements (% by weight):—Fe: 2% to 8%, and preferably 2% to 6%, more preferentially 3% to 5%;—optionally Zr: 0.5% to 2.5% or 0.5% to 2% or 0.7% to 1.5%;—optionally Si: <1%, or even <0.5% or even <0.2% or even <0.05%;—optionally Cu: 0.5%, or even <0.2%, or even <0.05%;—optionally Mg: 0.2%, preferably 0.1%, preferably <0.05%;—optionally other alloy elements <0.1% individually and in total <0.5%;—impurities: <0.05%, or even <0.01% individually, and in total <0.15%; remainder aluminium.

Abstract: The present invention relates to a process for the production of an aluminium multilayer brazing sheet which comprises a core layer made of a 3xxx alloy comprising 0.1 to 0.25 wt. % Mg, a brazing layer made of a 4xxx alloy on one or both sides of the core layer, and optionally an interlayer between the core layer and the brazing layer on one or both sides of the core layer, the process comprising the successive steps of: providing the layers to be assembled or simultaneous casting of the layers to obtain a sandwich; rolling of the resulting sandwich to obtain a sheet; and treating the surface of the sheet with an alkaline or acidic etchant.

Abstract: The invention relates to a process for manufacturing a part (20) comprising a formation of successive solid metal layers (201 . . . 20n), superimposed on one another, each layer describing a pattern defined from a numerical model (M), each layer being formed by the deposition of a metal (25), referred to as a filler metal, the filer metal being subjected to an input of energy so as to melt and constitute, by solidifying, said layer, wherein the filler metal takes the form of a powder (25), of which the exposure to an energy beam (32) results in a melting followed by a solidification in such a way as to form a solid layer (201, . . . 20n), the method being characterized in that the filler metal (25) is an aluminum alloy comprising at least the following alloying elements: Si, according to a weight fraction from 4% to 20%; Fe, according to a weight fraction from 2% to 15%. The invention also relates to a part obtained by this method.

Abstract: The present invention deals with a brazing sheet comprising: a core layer made of a AA3xxx alloy comprising, in weight percentages: up to 0.70% Si, up to 0.70% Fe, 0.20 to 1.10% Cu, 0.70 to 1.80% Mn, up to 0.40% Mg, up to 0.30% Zn, up to 0.30% Ti, Zr and/or Cr and/or V each up to 0.30%, other elements less than 0.05% each and less than 0.15% in total, balance being aluminium; a brazing layer, made of a AA4xxx alloy which is present on at least one side of the core layer; and an interlayer, inserted between the core layer and the brazing layer, on at least one side of the core layer, which composition comprises, in weight percentages: from 1.5 to 2.3% Zn, from 0.2 to 0.75% Mn, up to 0.5% Fe, up to 0.5% Si, other elements less than 0.05% each and less than 0.15% in total, balance being aluminium.

Abstract: The invention relates to a process for manufacturing a part, comprising the formation of successive solid metal layers (201 . . . 20n) that are stacked on one another, each layer describing a pattern defined from a numerical model (M)), each layer being formed by depositing a metal (25), referred to as filling metal, the filling metal being subjected to an input of energy so as to melt and form said layer by solidifying, in which process the filling metal is provided in the form of a powder (25), the exposure of which to an energy beam (32) results in melting followed by solidification such that a solid layer (201 . . . 20n) is formed, the process being characterized in that the filling metal (25) is an aluminum alloy comprising at least the following alloying elements: ?2 to 10% by weight of Cr; ?0 to 5% by weight, preferably 0.5 to 5% by weight, of Zr. The invention also relates to a part obtained by this process.

Abstract: The present invention relates to a process for manufacturing a part (20) comprising a formation of successive metal layers (201 . . . 20n), superimposed on one another, each layer describing a pattern defined from a numerical model, each layer being formed by the deposition of a metal (15, 25), referred to as a filling metal, the filling metal being subjected, at a pressure greater than 0.5 times the atmospheric pressure, to an input of energy so as to melt and constitute said layer, the process being characterized in that the filling metal is an aluminium alloy of the 2xxx series, comprising the following alloying elements: Cu, in a weight fraction of between 3% and 7%; Mg, in a weight fraction of between 0.1% and 0.8%; at least one element, or at least two elements or even at least three elements chosen from: Mn, in a weight fraction of between 0.1% and 2%, preferably of at most 1% and in a preferred manner of at most 0.8%; Ti, in a weight fraction of between 0.

Abstract: The invention is a method of manufacturing, from a workpiece, a metallic structural element comprising a skin, from which stringers extend. According to the invention, some of the stringers are obtained by machining, while the others are obtained by addition of material. The material can be added by an additive manufacturing process.