Safran

Office National D'etudes Et De Recherches Aerospatiales

Safran Aircraft Engines

Jean-Yves Guedou

Virginie Jaquet

Jérémy Rame

Pierre Caron

Odile Lavigne

Joël Delautre

Didier Locq

Mikael Perrut

Stephane Rousselin

Jean-Michel Patrick Maurice Franchet

Vikas Kumar

Ludovic Edmond Molliex

Caroline Aumont

Jean-Francois Fromentin

Bruno Jacques Dambrine

Dipankar Banerjee

Sandrine Chatel

Jean-Loup Bernard Victor Strudel

Laurent Germann

Tapash Nandy

Didier Rene Escure

Jean-Michel Patrick Franchet

Jean-Loup Bernard Strudel

Loeiz Naze

Isabelle Augustins Lecallier

The invention relates to a nickel-based superalloy comprising, in percentages by mass, 4.0 to 5.5% rhenium, 1.0 to 3.0 ruthenium, 2.0 to 14.0% cobalt, 0.3 to 1.0% molybdenum, 3.0 to 5.0% chromium, 2.5 to 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. The invention also relates to a single-crystal blade (A,B) comprising such an alloy and a turbomachine () comprising such a blade (A,B).

Nickel-based superalloy, single-crystal blade and turbomachine

A nickel-based superalloy comprises, in percentages by mass, 4.0 to 5.5% rhenium, 1.0 to 3.0 ruthenium, 2.0 to 14.0% cobalt, 0.3 to 1.0% molybdenum, 3.0 to 5.0% chromium, 2.5 to 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. A single-crystal blade comprises such an alloy and a turbomachine comprising such a blade.

A nickel-based superalloy comprises, in percentages by mass, 4.0 to 5.5% rhenium, 3.5 to 12.5% cobalt, 0.30 to 1.50% molybdenum, 3.5 to 5.5% chromium, 3.5 to 5.5% tungsten, 4.5 to 6.0% aluminum, 0.35 to 1.50% titanium, 8.0 to 10.5% tantalum, 0.15 to 0.30% hafnium, 0.05 to 0.15% silicon, the balance being nickel and unavoidable impurities. A single-crystal blade comprises such an alloy and a turbomachine comprising such a blade.

A titanium-based intermetallic alloy includes, in atomic percent, 16% to 26% Al, 18% to 28% Nb, 0% to 3% of a metal M selected from Mo, W, Hf, and V, 0.1% to 2% of Si, 0% to 2% of Ta, 1% to 4% of Zr, with the condition Fe+Ni&#x2264;400 ppm, the balance being Ti, the alloy also presenting an Al/Nb ratio in atomic percent lying in the range 1.05 to 1.15.

Titanium-based intermetallic alloy

Growing community of inventors

Moissy-Cramayel, France

Jean-Yves Guedou