IMPROVED AND PROPERTY-BALANCED NICKEL-BASE SUPERALLOYS FOR PRODUCING SINGLE CRYSTAL ARTICLES

Gas turbine engine efficiencies are increased through improvements in nickel-base superalloys used to make parts and components for gas turbine engines. These improved superalloys consist essentially of, in percentages by weight, 5-10 Or, 5-10 Co, 0-2 Mo, 3-10W. 3-8 Ta, 0-2 Ti, 5-7 Al, 0-6 Re, 0-0.5...

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Bibliographische Detailangaben
Hauptverfasser:	LEO BUCHAKJIAN,JR, CARL STEPHEN WUKUSICK
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE ALLOYS APPARATUS THEREFOR CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY CRYSTAL GROWTH FERROUS OR NON-FERROUS ALLOYS METALLURGY PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE REFINING BY ZONE-MELTING OF MATERIAL SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE SINGLE-CRYSTAL-GROWTH TREATMENT OF ALLOYS OR NON-FERROUS METALS UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL
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Beschreibung
Zusammenfassung:	Gas turbine engine efficiencies are increased through improvements in nickel-base superalloys used to make parts and components for gas turbine engines. These improved superalloys consist essentially of, in percentages by weight, 5-10 Or, 5-10 Co, 0-2 Mo, 3-10W. 3-8 Ta, 0-2 Ti, 5-7 Al, 0-6 Re, 0-0.5 Hf; 0-0.07C, 0-0.015B and 0-0.075Y, the balance being Ni and incidental impurities. They produce single crystal articles having improvements in temperature capability, based on stress rupture strength and low and high cycle fatigue properties. Because of their superior resistance to degradation by cyclic oxidation, and their resistance to hot corrosion, the superalloys possess a unique balance in mechanical and environmental properties.