Nickel-based alloy with optimized matrix properties

US10487376B2 · kind B2 · utility

Assignee

• MTU Aero Engines AG · DE

Inventors

• Thomas Goehler · Dachau, DE
• Ernst Affeldt · Puchheim, DE
• Ralf RETTIG · Erlangen, DE
• Robert Singer · Erlangen, DE
• Steffen NEUMEIER · Erlangen, DE
• Mathias GOEKEN · Baiersdorf, DE
• Ernst Fleischmann · Bayreuth, DE
• Uwe Glatzel · Bayreuth, DE
• Rainer Voelkl · Bayreuth, DE

Key dates

• Filing date: Apr 2, 2015
• Grant date: Nov 26, 2019
• Expiry date: Mar 1, 2038

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01D5/28
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to a nickel-based alloy having a microstructure with a matrix of γ-phase and precipitates of γ′-phase. The γ′-phase comprises a percentage by volume of from 50 vol % to 80 vol % in the temperature range of from 1000° C. to 1100° C. The nickel-based alloy comprises 8 to 13 at % aluminum, 3 to 14 at % cobalt, 4 to 12 at % chromium, 0.6 to 8 at % molybdenum, 0 to 6 at % rhenium, 0.5 to 4 at % tantalum, 0.5 to 4 at % titanium, 0.3 to 3.5 at % tungsten, 0 to 4 at % germanium, 0 to 0.6 at % hafnium, 0 to 4 at % ruthenium, balance nickel and unavoidable impurities. The concentrations of molybdenum and tungsten are selected such that the percentage X of molybdenum and tungsten in the γ-phase, X=0.84 CMo+CW, is greater than 5.5 at % at a temperature of from 1000° C. to 1100° C., CMo and CW being the concentrations of molybdenum and tungsten in at %.