About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
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Materials for High Temperature Applications: Next Generation Superalloys and Beyond
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Presentation Title |
Effects of Key Elements Ni, Cr and W on High-temperature Microstructural Stability of Multicomponent Co-base Superalloys |
Author(s) |
Longfei Li, Wendao Li, Min Zou, Qiang Feng, Ji-Cheng Zhao |
On-Site Speaker (Planned) |
Longfei Li |
Abstract Scope |
Novel γ′-strengthened Co-base superalloys opens a pathway to new generation high-temperature material. The knowledge of alloying effects on the high-temperature microstructural stability is crucial for the design of multicomponent Co-base superalloys, which is still limited nowadays as the transitional method is indeed inefficient and costly. In this work, an efficient approach combining CALPHAD and diffusion-multiple was used to study the individual and interactive effects of Ni, Cr and W on the long-term microstructural stability of Co-Ni-Al-W-Ta-Ti alloy system at 1000 °C. The relationships between the compositions, microstructural characteristics and elemental partitioning coefficients were established over a large compositional range by SEM, EMPA and thermodynamic analyses, and the individual and interactive effects of Ni, Cr and W on the long-term microstructure stability of multicomponent Co-base alloys were discussed. This study will be helpful for accelerating the development of multicomponent Co-base superalloys, as well as populating the thermodynamic database. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Temperature Materials, Copper / Nickel / Cobalt, |