Method for manufacturing an asymmetric component using additive manufacturing

A method of fabricating a part by additive fabrication, the part to be fabricated possessing an asymmetrical portion, the method comprising:

• supplying a digital model of a part to be fabricated;
• orienting the digital model relative to a construction direction for constructing the part;
• modifying the digital model by adding a sacrificial balancing fraction configured so as to balance residual stresses that appear in the part while fabricating the part;
• making a rough part layer by layer using an additive fabrication technique based on the modified digital model, said layers being stacked in the construction direction, the rough part including a sacrificial portion corresponding to the sacrificial balancing fraction of the modified digital model;
• and
• eliminating the sacrificial portion from the rough part using a material removal method to obtain said part that is to be fabricated;
• wherein the sacrificial balancing fraction is configured in such a manner that the sacrificial portion of the rough part possesses mass lying in a range 70% to 130% of a mass of the asymmetrical portion.