Process for manufacturing an aluminum alloy part

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

• wherein the solder is an aluminum alloy consisting of the following alloy elements:
• Ni, in a proportion by mass of 1% to 6%;
• Cr, in a proportion by mass of 1% to 7%;
• Zr, in a proportion by mass of 0.5 to 4%;
• Fe, in a proportion by mass of 0.1 to 0.3%;
• Si, in a proportion by mass of less than or equal to 1%;
• optionally Cu in a proportion by mass of 0 to 8%;
• optionally at least one element chosen from:
• Ti, W, Nb, Ta, Y, Yb, Nd, Er, Hf, Ce, Sc, V, Co, La, in a proportion by mass of less than or equal to 5% each, and less than or equal to 15% in total;
• optionally at least one element chosen from:
• Sr, Ba, Sb, Bi, Ca, P, B, In and/or Sn, in a proportion by mass of less than or equal to 1% each, and less than or equal to 2% in total;
• optionally at least one element chosen from:
• Ag in a proportion by mass of 0.06 to 1%, Li in a proportion by mass of 0.06 to 1%, and/or Zn in a proportion by mass of 0.06 to 1%;
• optionally at least one compound for refining grains chosen from:
• AlTiC and Al—TiB2;
• impurities in a proportion by mass of less than 0.05% each and less than 0.15% in total;
• the remainder being aluminum.