|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Energy Materials 2017: Materials for Gas Turbines
||Rafting Prediction Criterion and Creep Life for Nickel-based Single Crystal Superalloys under Multiaxial Stress States
||Zhixun Wen, Huan Yang, Zhufeng Yue, Chengjiang Zhang
|On-Site Speaker (Planned)
The rafting is one of the most important and interesting phenomena which occurs in nickel-based single crystal superalloys during high temperature creep tests. A based on the relief of interfacial energy density by dislocation generation at the γ-γ’ interface, a rafting prediction criterion has been developed for nickel-based single crystal superalloys under multiaxial stress states. The rafting process has been analyzed quantitatively by the relief of interfacial energy to predict the rafting life. The holed plate and notched bar creep specimens have been applied to validate the rafting prediction criterion and creep life models．The SEM photos of the rafting structures in different positions in the shear zone have been obtained and are applied to validate the rafting criterion．The life model results agree with the experimental results.
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