PROCESSING OF NICKEL-BASE ALLOYS FOR IMPROVED FATIGUE PROPERTIES

摘要

The fatigue properties of the precipitation-hardened, nickel-base alloys, such as Inconel 718, Incoloy 901 and Waspaloy, are significantly improved by a thermomechanical processing technique involving the generation of an intermetallic pinning phase, such as a spheriodal eta phase or an overaged gamma prime phase, with subsequent recrystallization to provide a uniform microstructure having a grain size of ASTM 10-13 or finer.