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

A new kind of Ni-Co-base superalloys with a gamma/gamma' 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 degrees C and higher creep resistances up to 725 degrees C than those of the UDIMET 720 LI alloy. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.