About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Neutron and X-ray Scattering in Materials Science
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Presentation Title |
The Forging and the Precipitation Behaviour in the New VDM© Alloy 780 Studied via In Situ High Energy X-ray Diffraction |
Author(s) |
Massimo Fritton, Frank Kümmel, Andreas Kirchmayer, Andreas Stark, Masood Hafez Haghighat, Bodo Gehrmann, Steffen Neumeier, Ralph Gilles |
On-Site Speaker (Planned) |
Massimo Fritton |
Abstract Scope |
Polycrystalline Ni-based superalloys are developed for applications in extreme conditions such as the heavily stressed rotating discs in the hot sections of modern gas turbines or jet engines. In this study, the forging and the γ´ precipitation during cooling and age hardening are analysed of the newly developed polycrystalline VDM© Alloy 780 via in situ high energy x-ray diffraction to mimic the entire fabrication process. In the first step, during the compressive deformation at around 1000°C subgrain formation is observed and the evolution of a texture due to grain rotation in preferred orientations. In the second step, directly after the hot forming, three different cooling rates are applied and their influence on the precipitation of the γ´ phase is determined. Finally, the age-hardening step of the alloy is studied comparatively at holding temperatures of 720°C and 800°C. The diffraction data are substantiated by supplementary microscopic examinations. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Temperature Materials, Characterization, |