Author(s) |
Ralph Gilles, Frank Kümmel, Massimo Fritton, Cecilia Solis, Alexander Mutschke, Andreas Kirchmayer, Steffen Neumeier, Masood Haghighat, Bodo Gehrmann |
Abstract Scope |
The development of gas turbine materials requires high-temperature strength, ductility, corrosion resistance and high creep resistance. Ni-base superalloys are the most common material for these tasks because size and volume fraction of hardening precipitates can be tuned up to very high temperatures. Using the example VDM®Alloy 780 (developed as a further improvement of the 718 alloy series) it is shown how neutron methods (neutron diffraction, small-angle neutron scattering) and complementary methods (scanning electron microscopy and atom probe tomography) support the microstructure characterization and the behavior at high-temperature processes. A sophisticated testing machine was built to perform unique experiments.
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[2] F. Kümmel et al., Metals (2021),11,719.
[3] C. Solis et al., Journal of Alloys and Compounds (2022),928,167203.
[4] F. Kümmel et al., Metals (2022),12,1067. |