Patent ID: 8142578

Claim:
A process for manufacturing a part made of a magnesium alloy, comprising: forging a block of the magnesium alloy in a closed die; and heat treating the forged block, wherein the alloy is a casting alloy, comprising, by weight: 85% magnesium; 0.2 to 1.3% zinc; 2 to 4.5% neodymium; 0.2 to 7.0% rare-earth metal with an atomic number from 62 to 71; and 0.2 to 1% zirconium, wherein the forging comprises a plastic deformation obtained by conducting the forging at a temperature above 400° C., and at a forging rate which is less than 40 mm/s, which is a rate of displacement of a forging slide of the closed die, and wherein yield strength of the part is reduced by less than 15% after 10,000 hours of aging at 180° C.