Centre National De La Recherche Scientifique

Safran

Université De Nantes

Université Paris Est Creteil Val De Marne

Clara Desgranges

Jérémy Rame

Edern Menou

Franck Tancret

Pierre Jean Sallot

Anne-Laure Rouffie

Loic Perriere

Guy Dirras

Mathilde Madeleine Louise Laurent

Jean-Marc Eric Joubert

Jean-Philippe François Couzinie

Thomas Philippe Joseph Rieger

Ivan Georges Guillot

A nickel-based superalloy includes, in weight percent, 4 to 6% aluminum, 5 to 8% cobalt, 6 to 9% chromium, 0.1 to 0.9% hafnium, 2 to 4% molybdenum, 5 to 7% rhenium, 5 to 7% tantalum, 2 to 5% tungsten, 0 to 0.1% silicon, the balance being of nickel and unavoidable impurities.

Nickel-based superalloy having high mechanical strength at a high temperature

A nickel-based superalloy includes, in weight percent, 6 to 8% aluminum, 12 to 15% cobalt, 4 to 8% chromium, 0 to 0.2% hafnium, 0.5 to 4% molybdenum, 3.5 to 6% rhenium, 4 to 6% tantalum, 1 to 3% titanium, 0 to 2% tungsten, 0 to 0.1% silicon, the balance being nickel and unavoidable impurities.

Low density nickel-based superalloy having high mechanical strength and environmental robustness at a high temperatures

A nickel-based superalloy includes, in atomic percentages, 13% to 21% chromium, 15% to 26% cobalt, 4% to 8% aluminum, 4.5% to 8% titanium, 8% to 18% iron, boron in an atomic percentage less than or equal to 0.5% or no boron, carbon in an atomic percentage less than or equal to 1% or no carbon, at least one additional element selected from molybdenum, tungsten, tantalum and niobium, a total atomic content of the at least one additional element being less than or equal to 1.5% or no such at least one additional element, the remainder being nickel and unavoidable impurities, with a sum of the atomic percentages of aluminum and titanium being comprised between 8.5% and 15%. The novel superalloy composition has a limited density and exhibiting, when hot, good mechanical properties as well as good resistance to oxidation and corrosion.

Superalloy with optimized properties and a limited density

Growing community of inventors

Moissy-Cramayel, France

Clara Desgranges