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: Liquid metal degassing device comprising a chamber containing a liquid metal bath, a device for circulating a gas through a purification chamber and in that the purification chamber comprises a getter material configured to trap dihydrogen from the circulating gas. Method for degassing a liquid metal bath to reduce the hydrogen concentration of the liquid metal comprising the following steps a) Preparing a liquid metal bath, preferably an aluminum alloy b) Circulating a gas, c) Exchanging hydrogen from the circulating gas with the liquid metal such that the hydrogen dissolved in the liquid metal bath diffuses into the circulating gas and enriches the circulating gas with dihydrogen, d) Purifying the circulating gas enriched with dihydrogen in a purification chamber comprising a getter material configured to trap dihydrogen from the circulating gas.

Abstract: Brazing strip or sheet comprising: a core layer made of aluminum alloy; a brazing layer made of aluminum alloy, clad on at least one face of the core layer; optionally an intermediate layer made of aluminum alloy, clad on at least one face either between the core layer and the brazing layer or the core layer without any other layer on top; characterized in that the brazing layer alloy comprises, in mass percentages: from 7 to 13% Si, at most 0.8% Fe, at most 0.45% Cu, at most 0.20% Mn, at most 0.15% Mg, at most 0.20% Zn, at most 0.20% Ti, at most 0.04% Bi, from 0.01 to 0.10% Y, from 0.01 to 0.10% Sn, remainder aluminum and impurities.

Abstract: The invention relates to a product made of an aluminium-based alloy comprising, by wt. %, Cu: 2.4-3.2; Li: 1.6-2.3; Mg: 0.3-0.9; Mn: 0.2-0.6; Zr: 0.12-0.18; such that Zr??0.06 *Li+0.242; Zn: <1.0; Ag: <0.15; Fe+Si?0.20; optionally, at least one element selected from Ti, Sc, Cr, Hf and V, the content of the element, if selected, being: Ti: 0.01-0.1; Sc: 0.01-0.15; Cr: 0.01-0.3; Hf: 0.01-0.5; V: 0.01-0.3; other elements ?0.05 each and ?0.15 in total; the remainder being aluminium.

Abstract: The method includes the following steps: a) providing a tubular sonotrode (1) formed in a material substantially inert to liquid aluminum, such as a ceramic, for example, silicon oxynitride, the sonotrode comprising a first open end region (2) and a second optionally closed end region (3), b) submerging at least some of the open end region (2) of the tubular sonotrode (1) in the liquid aluminum alloy, and c) applying power ultrasound on the liquid aluminum alloy by means of the tubular sonotrode (1).

Abstract: The disclosure provides for plate having a thickness of at least 80 mm comprising aluminium alloy as a percentage by weight %: Cu: 2.0-6.0; Li: 0.5-2.0; Mg: 0-1.0; Ag: 0-0.7; Zn 0-1.0; and at least one element selected from Zr, Mn, Cr, Sc, Hf and Ti, the amount of said element, if selected, being 0.05 to 0.20 wt % for Zr, 0.05 to 0.8% wt % t for Mn, 0.05 to 0.3 wt % for Cr and for Sc, 0.05 to 0.5 wt % Hf and 0.01 to 0.15% wt % for Ti, Si?0.1; Fe?0.1; others ?0.05 each and ?0.15 in total, wherein the aged state logarithmic fatigue mean measured at mid-thickness in the LT direction on smooth specimens with a maximum stress amplitude of 242 MPa, a frequency of 50 Hz, a stress ratio of R=0.1 of at least 250,000 cycles.

Abstract: The method comprising the following steps: a) Providing a first bath of a liquid metal (1) comprising aluminium with a content X and magnesium with a content Y, the magnesium content Y being different to zero, b) Immersing at least partially a sonotrode (3) formed from a material inert to liquid aluminium, in the first bath of liquid metal (1), and c) Applying power ultrasounds to the sonotrode (3) so as to excite the liquid metal (1) until wetting (5) of the sonotrode (3) by the liquid metal (1) is obtained. d) Cooling the first liquid metal (1) of the first bath until solidification of the first liquid metal (1) around the sonotrode (3) is obtained, generating an intimate bond (6) between the sonotrode (3) and the solidified first liquid metal (1) having a bonding strength substantially equal to that of brazing between two metals. e) Machining the solidified first metal (1) in the form of a flange (7) configured for the attachment of a mechanical amplifier and/or of a transducer (4).

Abstract: The invention relates to a method for manufacturing an aluminum alloy product including the steps of: creating a bath of liquid metal in an aluminum-copper-lithium alloy, casting said alloy by vertical semi-continuous casting so as to obtain a plate with thickness T and width W such that, during solidification, the hydrogen content of said liquid metal bath (1) is lower than 0.4 ml/100 g, the oxygen content above the liquid surface (14, 15) is less than 0.5% by volume.

Abstract: The invention relates to a manufacturing method for making an unwrought semi-finished product having at mid thickness a density of micropores of size greater than 90 ?m less than 50% and preferably less than 20% of the density of micropores of size greater than 90 ?m obtained by a method according to prior art. The method according to the invention comprises in particular an ultrasound treatment step for the molten metal bath in a furnace and/or a vessel using an immersed device comprising at least one ultrasound transmitter. The semi-finished products obtained according to the method of the invention are particularly advantageous for manufacturing by rolling sheets designed for the aircraft industry to produce spars, ribs, upper and lower wing skins and for manufacturing by extrusion sections designed for the aircraft industry to produce stiffeners.

Abstract: The invention relates to a method for the vertical semi-continuous direct chill casting of composite billets or plates comprising at least two layers of aluminum alloys, using a separator which is in contact with the solidification front and which provides a seal between the two alloys during casting, said separator being vibrated while it is in contact with the solidification front, so that the separator is not frozen in and entrained by the solid metal. The invention also relates to a device that can be used to carry out said method.

Abstract: The invention relates to a method for the vertical semi-continuous direct chill casting of composite billets or plates comprising at least two layers of aluminium alloys, using a separator which is in contact with the solidification front and which provides a seal between the two alloys during casting, said separator being vibrated while it is in contact with the solidification front, so that the separator is not frozen in and entrained by the solid metal. The invention also relates to a device that can be used to carry out said method.

Abstract: An aluminum-based welding filler wire is made with an aluminum alloy that contains between 0.1 and 6 wt. % titanium, including one portion in the form of TiB2 particles, TiC particles, or a combination thereof, and another portion in the form of free titanium. The filler wire can be used in welding aluminum-based materials.

Abstract: Process for manufacturing aluminium alloy products, with high toughness and fatigue resistance comprising: (a) preparing an aluminium alloy bath, (b) adding a refining agent containing particles of AlTiC type phases into the bath, (c) casting an as-cast form such as an extrusion ingot, a forging ingot or a rolling ingot, (d) hot transforming the as-cast form, possibly after scalping, to form a blank or a product with final thickness, (e) optionally cold transforming the blank to a final thickness, (f) applying a solution heat treatment and quenching the product output from (d) or (e), followed by relaxation by controlled stretching with permanent elongation between 0.5 and 5%, and optionally annealing, wherein the quantity of refining agent is chosen such that the average casting grain size of the as-cast form is more than 500 ?m. The present invention may be used, for example, to manufacture fuselage sheet or light-gauge plates made with 6056 alloy.

Abstract: Process for manufacturing aluminum alloy products, with high toughness and fatigue resistance comprising: (a) preparing an aluminum alloy bath, (b) adding a refining agent containing particles of AlTiC type phases into the bath, (c) casting an as-cast form such as an extrusion ingot, a forging ingot or a rolling ingot, (d) hot transforming the as-cast form, possibly after scalping, to form a blank or a product with final thickness, (e) optionally cold transforming the blank to a final thickness, (f) applying a solution heat treatment and quenching the product output from (d) or (e), followed by relaxation by controlled stretching with permanent elongation between 0.5 and 5%, and optionally annealing, wherein the quantity of refining agent is chosen such that the average casting grain size of the as-cast form is more than 500 ?m. The present invention may be used, for example, to manufacture fuselage sheet or light-gauge plates made with 6056 alloy.

Abstract: Process for manufacturing aluminium alloy products, with high toughness and fatigue resistance comprising: (a) preparing an aluminium alloy bath, (b) adding a refining agent containing particles of AlTiC type phases into the bath, (c) casting an as-cast form such as an extrusion ingot, a forging ingot or a rolling ingot, (d) hot transforming the as-cast form, possibly after scalping, to form a blank or a product with final thickness, (e) optionally cold transforming the blank to a final thickness, (f) applying a solution heat treatment and quenching the product output from (d) or (e), followed by relaxation by controlled stretching with permanent elongation between 0.5 and 5%, and optionally annealing, wherein the quantity of refining agent is chosen such that the average casting grain size of the as-cast form is more than 500 ?m. The present invention may be used, for example, to manufacture fuselage sheet or light-gauge plates made with 6056 alloy.

Abstract: Process for forming an aluminum alloy strip, including the steps of a) obtaining an aluminum alloy consisting essentially of, by weight, 0.5 to 13% Si, 0 to 2% Mg, 0 to 2% Cu, 0 to 1% Mn, 0 to 2% Fe, other elements less than 0.5% each and less than 2% total, and remainder Al; and b) continuously casting the aluminum alloy between twin cooled rolls having a force applied thereto, to obtain a cast strip of thickness between 1.5 and 5 mm, and optionally cold rolling the cast strip. The force applied to the rolls is maintained below an amount represented by a straight line between a point A and a point B on a graph of specific applied force (y-axis) vs. cast width (x-axis), where point A is (1.5 mm, 750 tons/meter at cast width) and point B is (5 mm, 500 tons/meter of cast width).

Abstract: In order to facilitate resuming molecular beam epitaxy after etching a substrate or an epitaxial layer, the etching method is implemented in an ultra-high vacuum, and it consists in producing at least two simultaneous chemical beams converging towards the substrate or the layer, the beams being formed of substances, each of which is capable of reacting with elements of different types in the substrate or the layer so as to form volatile compounds. Application in particular to manufacturing photonic and optoelectronic components.

Abstract: A process for obtaining bimaterial parts by casting an aluminum alloy onto an insert coated with a metal film. In this process, the oxide layer is removed from the insert by treatment under vacuum, and then the insert is coated with a titanium based film by physical vapor deposition, and the insert is placed in a mold which is filled with a casting alloy.

Abstract: The disclosure relates to a method of obtaining, by moulding, bimaterial parts formed by two aluminium alloys one of which constitutes the core and the other the matrix. The method consists in using a core, optionally containing a refractory skeleton, removing a natural coating of alumina present on the surface of the core and immediately afterwards coating the assembly thus obtained with a film impermeable to gas and consisting of a metal such as nickel, placing the coated assembly in a mould which is filled with the alloy of the matrix in the molten state at a temperature such that at least 30% of the core is superficially remelted. The method can be applied to the manufacture of motor vehicle parts such as engine cylinder heads and the insertion of ducts into aeronautical parts.

Abstract: A charge coupled device (CCD) sensitive to infrared radiation composed of a succession of three layers of Group III-V semiconductor material. The layers are a window layer, a sensitive layer and a storage layer. The layers are fixed to a supporting plate serving as input for the radiation and as a rear surface of the device. The front surface of the device supports a plurality of control electrodes and at least one output electrode.The window layer and the storage layer of the CCD are made of a binary compound AB. The sensitive layer is made of an n-ary compound (A,X,Y . . . ).sub.III (B,M,N . . . ).sub.V having a larger forbidden energy band and a smaller absorption limit wavelength than the window and storage layers.The three layers of the device are formed by epitaxial growth on a substrate. The substrate is a layer of the binary compound AB coated with an epitaxial layer of the n-ary compound. The epitaxial substrate layer is a chemical blocking layer.