|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||O-36: The Influence of Ru Addition on the Precipitation Behavior of Topologically Close-packed Phase in the Ni-based Superalloy
||Sangwon Lee, Kyuseon Jang, Hosun Jun, Jeonghyun Do, Pyuck-Pa Choi
|On-Site Speaker (Planned)
For Ni-based superalloys, the formation of topologically close-packed (TCP) phase which deteriorates creep life has been considered as one of the main issues during past three decades. To enhance the microstructural instability, Ru has been adopted in the 3rd generation and it has suppressed the formation of TCP phases effectively. However, although many researchers reported about TCP suppression in Ru-containing alloys, its underlying mechanism is still unclear and under debate. In addition, some studies reported that Ru-additions to superalloys caused promotion of TCP phases rather than suppression, such that detailed research on the role of Ru in the formation of TCP is required. In this study, we investigated the TCP precipitation behavior in a Ru-containing Ni-based superalloy from the viewpoints of compositional and crystallographic effects by atom probe tomography (APT) and transmission electron microscopy (TEM).
||Phase Transformations, Characterization, High-Temperature Materials