Method for producing metal alloy parts with complex shape

A method for obtaining a turbine engine solid blade having three constituent portions that comprise a core (1), a head (3) and a root (2), the core having two ends, the root being joined to one end of the core and the head being joined to the other end of the core, said constituent portions having distinct shapes, said blade being intended to be part of a set of blades, said method comprising:

• a first step comprising one of:
• obtaining at least one solid part made of ceramic-based material, or
• cutting the at least one solid part from a bar made of a metal alloy;
• a second step of producing a blade blank from at least two blank parts (42, 61, 71, 50, 51, 64, 65, 80, 81, 90, 91, 92, 93), at least one of the blank parts being a solid part obtained in the said first step, said at least two blank parts being assembled by a diffusion connection technique without melting, said technique being a Spark Plasma Sintering technique, and,
• a third step of machining this blade blank to produce a final blade with a defined profile, the root of the final blade being configured for fixing on a turbine hub or a turbine disk and the head of the final blade having a shape configured to contact heads of adjacent blades of the said set of blades.