Process for manufacturing or repairing a monobloc bladed disc

A disc for a monobloc bladed disc comprising:

• at least one protruding projection extending from an upstream end to a downstream end along a protruding projection chord, and on which protruding projection a welded joint surface is provided that is configured to allow a blade to be fitted by linear friction welding onto the protruding projection of the disc,
• wherein for at least one protruding projection, the welded joint surface includes at least two butt-jointed plane portions inclined with respect to each other and arranged one after the other along the protruding projection chord.

A disc for a monobloc bladed disc including the disc and at least one blade, the disc comprising:

• at least one projection means for receiving a blade, each projection means including a welded joint surface for welding the blade by linear friction welding onto the welded joint surface, said projection means extending from an upstream end to a downstream end along a protruding projection chord,
• wherein for at least one projection means, the welded joint surface includes at least two butt-jointed plane portions inclined with respect to each other and arranged one after the other along the protruding projection chord.