Method for manufacturing a part including a formation of successive solid metal layers (20 1...20 n), superimposed on each other, each layer describing a pattern defined from a digital model, each layer being formed by the deposition of a metal, referred to as solder, the solder being subjected to an input of energy so as to start to melt and to constitute, by solidifying, said layer, wherein the solder is in 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 (20 1...20 n), the method being characterised in that the solder is an aluminium alloy comprising at least the following alloy elements: - Si, in a fraction by weight of 0 to 4%, preferably 0.5 to 4%, more preferentially 1 to 4%, and even more preferentially 1 to 3%; - Fe, in a fraction by weight of 1% to 15%, preferably 2 to 10%; - V, in a fraction by weight of 0 to 5%, preferably 0.5 to 5%, more preferentially 1 to 5%, and even more preferentially 1 to 3%; - at least one element chosen from: Ni, La and/or Co, in a fraction by weight of 3 to 8% each and in a fraction by weight of less than or equal to 15%, preferably less than or equal to 12% in total; - optionally at least one element chosen from Mn, Ti, W, Nb, Ta, Y, Yb, Nd, Er, Cr, Zr, Hf, Sc, Ce and/or mischmetal, in a fraction by weight 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 fraction by weight 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 fraction by weight of 0.06 to 1%, Li in a fraction by weight of 0.06 to 1%, Cu in a fraction by weight of 0.06 to 5%, Zn in a fraction by weight of 0.06 to 1% and/or Mg in a fraction by weight of 0.06 to 1%; - impurities in a fraction by weight of less than 500 ppm each and less than 0.15% in total; - the remainder being aluminium. - Si, in a fraction by weight of 0 to 4%, preferably 0.5 to 4%, more preferentially 1 to 4%, and even more preferentially 1 to 3%; - Fe, in a fraction by weight of 1% to 15%, preferably 2 to 10%; - V, in a fraction by weight of 0 to 5%, preferably 0.5 to 5%, more preferentially 1 to 5%, and even more preferentially 1 to 3%; - at least one element chosen from: Ni, La and/or Co, in a fraction by weight of 3 to 8% each and in a fraction by weight of less than or equal to 15%, preferably less than or equal to 12% in total; - optionally at least one element chosen from Mn, Ti, W, Nb, Ta, Y, Yb, Nd, Er, Cr, Zr, Hf, Sc, Ce and/or mischmetal, in a fraction by weight 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 fraction by weight 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 fraction by weight of 0.06 to 1%, Li in a fraction by weight of 0.06 to 1%, Cu in a fraction by weight of 0.06 to 5%, Zn in a fraction by weight of 0.06 to 1% and/or Mg in a fraction by weight of 0.06 to 1%; - impurities in a fraction by weight of less than 500 ppm each and less than 0.15% in total; - the remainder being aluminium.