Development of New Generation Turbine Disk Superalloys in the HTM21 Project
A new kind of cast & wrought (C&W) Ni-Co base superalloys named as “TMW alloys” was developed recently for compressor and turbine disk of gas turbine engines in the High Temperature Materials 21 Project at the National Institute for Materials Science (NIMS) in Japan. These Ni-Co base superalloys combine the characters of two kinds of γ- γ’ two-phase alloys (Ni-base and Co-base superalloys) and can be fabricated by cheap cast and wrought processing route. The results showed that some of these TMW alloys have superior tensile strength at temperatures up to 750 °C and higher creep resistances up to 725 °C than commercial UDIMET 720 LI alloy.
Yafang Han et al.
Y. F. Gu et al., "Development of New Generation Turbine Disk Superalloys in the HTM21 Project", Materials Science Forum, Vols. 546-549, pp. 1277-1280, 2007