Oxidation resistant low expansion superalloys

US5403547A · kind A · utility

Assignee

• INCO Alloys International, Inc. · US

Inventors

• John S. Smith · Proctorville, US
• Darrell F. Smith, Jr. · Huntington, US
• Roneldo L. Fisher · Huntington, US
• Karl A. Heck · Proctorville, US

Key dates

• Filing date: Apr 13, 1994
• Grant date: Apr 4, 1995
• Expiry date: Apr 13, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C30/00
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

An oxidation resistant alloy containing iron, cobalt, nickel and at least 4 to 5% by weight aluminum having at least a duplex crystalline structure. One crystalline component of this structure is a gamma (fcc) phase having a gamma prime phase dispersed therein. The second crystalline component is enriched in aluminum compared to the first crystalline component and exhibits characteristics under X-ray diffraction and electron diffraction analysis of a BCC B2 structured phase.