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US 2019/0169715 A1Published application
Nickel-based superalloy and parts made from said superalloy
AssigneeAubert & Duval
InventorsAlexandre DEVAUX, Philippe HERITIER
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Abstract
A nickel superalloy has the following composition, the concentrations of the different elements being expressed as wt-%: Formula (I), the remainder consisting of nickel and impurities resulting from the production of the superalloy. In addition, the composition satisfies the following equation, wherein the concentrations of the different elements are expressed as atomic percent: Formula (II).
Claims15
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%;
- 3.6%≤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
12 more elements
Dependencies are inferred from the claim text.