Nickel-based superalloy and parts made from said superalloy

A process for the preparation of a part comprising manufacturing a part from a nickel-based superalloy of the following composition, the contents of the various elements being expressed as weight percentages:

• 1.3%≤Al≤2.8%;
• trace amounts≤Co≤11%;
• 14%≤Cr≤17%;
• trace amounts≤Fe≤12%;
• 2%≤Mo≤5%;
• 0.5%≤Nb+Ta≤2.5%;
• 2.5%≤Ti≤4.5%;
• 1%≤W≤4%;
• 0.0030%≤B≤0.030%;
• trace amounts≤C≤0.1%;
• 0.01%≤Zr≤0.06%;
• the remainder consisting of nickel and impurities resulting from the production,
• and such that the composition satisfies the following equations wherein the contents are expressed as atomic percentages:
• 8≤Al at %+Ti at %+Nb at %+Ta at %≤11
• 0.7≤(Ti at %+Nb at %+Ta at %)/Al % at %≤1.3,
• wherein the superalloy comprises a gamma′ phase fraction comprised between 30 and 44%, and the solvus of the gamma′ phase of the superalloy is less than 1,145° C.