|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Advanced Characterization of High-temperature Alloys: Phase Evolution during Manufacturing and Service-induced Deformation
||The Role of Ru on the Deformation Mechanism of a Single Crystal Superalloy during Thermomechanical Fatigue
||Paraskevas Kontis, Zhicheng Ge, Guang Xie, Di Wan, Jinghao Xu, Mikael Segersäll, Viktor Norman, Johan Moverare, Jian Zhang
|On-Site Speaker (Planned)
The deformation mechanisms during out-of-phase thermomechanical fatigue of a Ru-doped and Ru-free single crystal nickel-based superalloy were studied and compared. The addition of Ru was found to enhance the thermomechanical fatigue performance of the single crystal superalloy at the temperature cycle of 400-900 °C. Scanning and transmission electron microscopy revealed a change on the deformation mechanism between the two alloy variants, which will be presented. In addition, atom probe tomography provided new insights on the partitioning of Ru, among other solutes, at dislocations and stacking faults after thermomechanical fatigue. These atomic scale insights combined with microstructural observations will be presented, aiming to provide us with a fundamental understanding on the role of Ru on high temperature thermomechanical fatigue behaviour of single crystal nickel-based superalloys.