|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Energy Materials 2017: Materials for Gas Turbines
||Alloy Development for Promoting γ/γ' Microstructural Stability and Creep Properties of Multi-component Co-base Superalloys
||Wendao Li, Haijing Zhou, Song Lu, Fei Xue, Qiang Feng
|On-Site Speaker (Planned)
Novel γ'-strengthened Co-Al-W-base superalloys possess excellent hot corrosion resistance and thermal fatigue properties, and they show potential applications for hot section components in gas turbine industry. Our study suggested that the individual and synergetic effects of Ta and Ti additions improved the γ' solvus temperature, γ/γ' microstructural stability and creep resistance at high temperatures in novel Co-base superalloys. To further improve the balanced properties of the γ' stability and creep resistance as well as oxidation and hot corrosion resistance at high temperature, an ICME approach has been used to develop this class of superalloys. The influence of alloying elements on microstructural stability in Co-Al-W-Ta-Ti-base superalloys were investigated. Meanwhile, thermodynamic calculation was performed to identify the trend for optimizing alloy chemistries. The creep mechanisms of Co-Al-W-Ta-Ti single crystal superalloy will be also discussed. This work is helpful for continuous efforts on alloy development to improve temperature capability of γ'-strengthened Co-base superalloys.
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