New Ni–Co-base disk superalloys with higher strength and creep resistance

A new kind of Ni–Co-base superalloys with a γ/γ′ two-phase structure has been proposed recently for turbine disk applications. Some of these Ni–Co-base superalloys are assessed by tensile tests. The results show that the Ni–Co-base alloys can be processed by cheap cast and wrought route and show superior tensile strength at temperatures up to 750 °C and higher creep resistances up to 725 °C than those of the UDIMET 720 LI alloy.