Process for manufacturing aluminium alloy parts

Method for manufacturing a part including a formation of successive solid metal layers, superimposed on one another, each layer describing a pattern defined from a digital model (M), each layer being formed by the deposition of a metal comprising a solder, the solder being subjected to an input of energy so as to melt and, in solidifying, to constitute said layer, wherein the solder takes the form of a powder, the exposure of which to an energy beam results in melting followed by solidification so as to form a solid layer,

• wherein the solder is an aluminum alloy comprising at least the following alloy elements:
• Ni, in a proportion by mass of 1 to 6%, optionally 1 to 5%, optionally 2 to 4%;
• Mn, in a proportion by mass of 1 to 7%, optionally 1 to 6%, optionally 2 to 5%;
• Zr, in a proportion by mass of 0.5 to 4%, optionally 1 to 3%;
• Fe, in a proportion by mass of less than or equal to 1%, optionally 0.05 to 0.5%, optionally 0.1 to 0.3%;
• Si, in a proportion by mass of less than or equal to 1%, optionally less than or equal to 0.5%.