Directional solidification of superalloys

US4964453A · kind A · utility

Assignee

• The United States as represented by the Administrator of the National Aeronautics Space Administration · US

Inventors

• Deborah D. Schmidt · Madison, US
• Wendy S. Alter · Bow, US
• William D. Hamilton · Huntsville, US

Key dates

• Filing date: Sep 7, 1989
• Grant date: Oct 23, 1990
• Expiry date: Sep 7, 2009

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22D27/045
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

This invention relates to the directional solidification of superalloys, in particular nickel-based superalloys, by imposition of a predetermined temperature profile in the solidification front and, depending on the desired results, a predetermined rate of advance of said solidification front, whereas castings of markedly superior fatigue resistance are produced.