Process for manufacturing an aluminum alloy part

A process for manufacturing a part including a formation of successive solid metal layers, which are superimposed on each other, each layer describing a pattern defined using a digital model (M), each layer being formed by depositing a metal, referred to as filler metal, the filler metal being subjected to a supply of energy so as to become molten and to constitute, upon solidifying, said layer, wherein the filler metal takes form of a powder, the exposure of which to an energy beam results in a melting followed by a solidification, so as to form a solid layer,

• wherein the filler metal is an aluminum alloy comprising at least the following alloy elements:
• Fe, according to a mass fraction from 1 to 10%, optionally from 2 to 8%, optionally from 2 to 5%, optionally from 2 to 3.5%;
• Cr, according to a mass fraction from 1% to 10%, optionally from 2 to 7%, optionally from 2 to 4%;
• optionally Zr and/or Hf and/or Er and/or Sc and/or Ti, according to a mass fraction up to 4%, optionally from 0.5 to 4%, optionally from 1 to 3%, optionally from 1 to 2% each, and according to a mass fraction less than or equal to 4%, optionally less than or equal to 3%, optionally less than or equal to 2% in total;
• Si, according to a mass fraction less than or equal to 1%, optionally less than or equal to 0.5%.