About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Thermodynamics and Kinetics of Alloys
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Presentation Title |
On the Effect of Different Elements on the Phase Stability of Bulk γ Alloys, Which Compositions Were Derived from Co-base Superalloys |
Author(s) |
Maik Rajkowski, Mike Schneider, Aleksander Kostka, Christoph Somsen, Guillaume Laplanche |
On-Site Speaker (Planned) |
Maik Rajkowski |
Abstract Scope |
Here, we investigate how small chemical variations influence the phase stability of initially single-phase γ alloys. The γ-phase composition of a Co-base superalloy (ERBOCo-1) was determined by atom probe tomography, from which nine alloys were derived. These alloys contain mainly Co, followed by Ni, Cr, and W (major elements) with low quantities of other elements. In the first four alloys, the concentration of one of the major elements was reduced by ~5 at.% and compensated by increases in the concentrations of the other major elements while the contents of the minor elements were kept constant. In the other alloys, the compositions were simplified to quaternary CrCoNiW alloys such that the ratios between major elements remained the same. The alloys were cast, homogenized, cold-worked, and annealed for up to 1500 h followed by microstructural and chemical investigations including X-ray diffraction, scanning and transmission electron microscopies, and energy dispersive X-ray spectroscopy. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Temperature Materials, Characterization, |