|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Deformation and Damage Mechanisms in High Temperature Ni, Co and Fe-based Superalloys
||Predictive Equations of the Elastic Modulus for Individual γ and γ´ Phases in the Ni-Al-W System
||Takuma Saito, Makoto Osawa, Tadaharu Yokokawa, Toshiharu Kobayashi, Hiroshi Harada, Kyoko Kawagishi, Yuhi Mori, Shinsuke Suzuki
|On-Site Speaker (Planned)
The driving force for rafting in Ni-base superalloys is the anisotropic distribution of strain energy at the γ/γ´ interface under tensile creep. The elastic misfit between the γ and γ´ phases is the indispensable factor for this distribution. Therefore, to develop optimum alloys the elastic misfit needs to be controlled. The aim of this study is to derive equations that predict the elastic modulus of the individual γ and γ´ phases. The elastic modulus was obtained using the rectangular parallelepiped resonance method. The  longitudinal elastic modulus of the γ´ single phase alloy was larger than that of the γ single phase alloy in the Ni-Al-W system from the room temperature to 1100°C. Equations of the elastic modulus in the individual γ and γ´ phases were derived from the experimental one in this study and literatures. The elastic modulus from these equations was in good agreement with the experimental one.
||Planned: Supplemental Proceedings volume