HEAT TREATED SUPERALLOY SINGLE CRYSTAL ARTICLE AND PROCESS

摘要

Nickel base superalloy single crystal articles formed from an alloy family and heat treated are described as is the process employed. The articles are substantially free from cobalt and the grain boundary strengtheners such as carbon, boron, and zirconium. The heat treatment process homogenizes the microstructure, and refines the gamma prime morphology. The superalloy has particular utility in the fabrication of airfoils (blades and vanes) for use in gas turbine engines.