Abstract

Single crystal superalloys and casting technology offer a combination of attractive properties for advanced gas turbine engine components. The alloys are designed to produce superior properties for a challenging combination of requirements: high temperature creep-strength, fatigue resistance, oxidation resistance, coating performance and retention of performance in thin-walled configurations. Application of this technology to new components has only been restricted by the competing criteria of affordability for first time introduction. The development of improved single crystal superalloys, CMSX-4 (SLS)[La+Y] and CMSX-486 provide an appealing combination of enhanced performance and production affordability for demanding, high temperature applications in advanced gas turbine engines.