	US 11,725,261 B2
	Nickel-based superalloy, single-crystal blade and turbomachine
Jérémy Rame, Moissy-Cramayel (FR); Virginie Jaquet, Moissy-Cramayel (FR); Joël Delautre, Moissy-Cramayel (FR); Jean-Yves Guedou, Moissy-Cramayel (FR); Pierre Caron, Les Ulis (FR); Odile Lavigne, Paris (FR); Didier Locq, Le Plessis Robinson (FR); and Mikael Perrut, Issy-les-Moulineaux (FR)
Assigned to SAFRAN, Paris (FR); and OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES, Palaiseau (FR)
Filed by SAFRAN, Paris (FR); and OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES, Palaiseau (FR)
Filed on Apr. 6, 2022, as Appl. No. 17/658,207.
Application 17/658,207 is a continuation of application No. 16/763,816, previously published as PCT/FR2018/052839, filed on Nov. 14, 2018.
Claims priority of application No. 1760679 (FR), filed on Nov. 14, 2017.
Prior Publication US 2022/0364208 A1, Nov. 17, 2022
Int. Cl. C22C 19/05 (2006.01); F01D 5/28 (2006.01)

CPC C22C 19/057 (2013.01) [F01D 5/28 (2013.01); F05D 2300/175 (2013.01); F05D 2300/607 (2013.01)]

10 Claims

1. A nickel-based superalloy comprising:

a single-crystal structure that includes γ′ Ni3(Al, Ti, Ta) precipitates dispersed in a γ matrix and having a size ranging from 300 to 500 nm; and

in percentages by mass, 4.0 to 5.5% rhenium, 1.0 to 3.0% ruthenium, 2.0 to 14.0% cobalt, 0.30 to 1.00% molybdenum, 3.0 to 5.0% chromium, 2.5 to less than 4.0% tungsten, 4.5 to 6.5% aluminum, 0.50 to 1.50% titanium, 8.0 to 9.0% tantalum, 0.15 to 0.30% hafnium, 0.05 to 0.15% silicon, the balance being nickel and unavoidable impurities, wherein the γ′ Ni3(Al, Ti, Ta) precipitates account for 50-70% of the nickel-based superalloy by volume.