Constellium Issoire

C-tec Constellium Technology Center

Constellium Rolled Products Ravenswood, LLC

Marine Ledoux

Timothy Warner

Philippe Jarry

Bechir Chehab

Jocelyn Prigent

Maria Belen Davo Gutierrez

The invention relates to a process for manufacturing a part () comprising a formation of successive solid metal layers (), 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 (), 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 (), of which the exposure to an energy beam () results in a melting followed by a solidification in such a way as to form a solid layer (), the method being characterized in that the filler metal () is an aluminum alloy comprising at least the following alloying elements: The invention also relates to a part obtained by this method. The alloy used in the additive manufacturing method according to the invention, makes it possible to obtain parts with remarkable mechanical performance, while still obtained a method of which the productivity is advantageous.

Process for manufacturing an aluminum alloy part

The invention relates to a method for manufacturing an aluminum alloy sheet, wherein an aluminum alloy is prepared with the following composition, in wt %: Mg: 4.0-5.2, Mn: 0.40-1.0, Zn: 0.15-0.40, at least one element selected from Ti, Cr, Cu and Zr, the content of the element, if selected, being 0.01-0.15 for Ti, 0.05-0.25 for Cr, 0.02-0.25 for Cu, 0.05-0.25 for Zr, Fe: <0.40, Si: <0.40, other elements or impurities <0.05 each and <0.15 in total, the remainder being aluminum. A rolling plate is cast by vertical semi-continuous casting, and said optionally homogenised plate is hot-rolled in two successive stages to obtain a sheet. The sheets obtained by the method according to the invention are advantageous, in particular for shipbuilding, since they demonstrate, after being exposed for 7 days to a temperature of 100° C., a weight loss of less than 15 mg/cm2 during a corrosion test according to the ASTM G67 standard.

AlMgMn alloy product with improved corrosion resistance

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Grenoble, France

Marine Ledoux