Gamma-channel stabilization mechanism in Ni-base superalloys

Goerler, Johannes V.; Brinckmann, Steffen; Shchyglo, Oleg; Steinbach, Ingo

doi:10.1080/09500839.2015.1109716

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Gamma-channel stabilization mechanism in Ni-base superalloys

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Brinckmann, Steffen
Interdisciplinary Center for Advanced Materials Simulation (ICAMS), Ruhr University Bochum, Universitätsstrasse 150, 44780 Bochum, Germany ;
Nanotribology, Structure and Nano-/ Micromechanics of Materials, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

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引用

Goerler, J. V., Brinckmann, S., Shchyglo, O., & Steinbach, I. (2015). Gamma-channel stabilization mechanism in Ni-base superalloys. Philosophical Magazine Letters, 95(11), 519-525. doi:10.1080/09500839.2015.1109716.

引用: https://hdl.handle.net/11858/00-001M-0000-002A-5C8B-F

要旨

A mechanism is presented which opposes coalescence of gamma'-precipitates in Ni-base superalloys. The mechanism is based on the non-linear behaviour of the elastic energy in gamma-channels, caused by the misfit strain between matrix and precipitate, as a function of the channel width. Variation of the channel width causes a disjoining pressure dependent on the density of misfit dislocations.