D. L. Ballard, D. S. Weaver, S. L. Semiatin, P. L. Martin, Air Force Research Laboratory, Wright-Patterson AFB, OH
Platinum- and iridium-modified γ-γ’ nickel-base superalloys are being evaluated for use at high-temperatures due to their superior oxidation resistance when compared to conventional nickel-base superalloys. Due to a higher γ’ solvus, these materials also retain excellent strength at temperatures in excess of 1100°C. However, because of their cost and density, sheet and foil applications are being pursued. Mechanical and other physical properties in these product forms will be compared to conventional nickel-base superalloys, such as Waspaloy and alloy 718.
Summary: Properties of thin gage platinum group metal-modified γ-γ’ nickel-base superalloy candidates will be compared to conventional nickel-base superalloys.
