Abstract
Single crystal Ni-base superalloys are an integral feature of modern gas turbine engines. Their excellent high temperature tensile properties are a result of a number of factors including an absence of grain boundaries and a matrix which comprises a high volume fraction of cuboidal γ’ in a solid solution strengthened γ matrix. Such a combination of a two-phase structure embedded within a single crystal leads to complex anisotropic creep properties. Accurate modelling of creep anisotropy in these materials is crucial for prediction of stress redistribution and life. In this paper, a physically based, isothermal slip system model, which incorporates interaction between slip system types is introduced. Its predictive capabilities for both uniaxial and multiaxial loading at 1223K are discussed using a creep test matrix for calibration and validation purposes.
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© 2001 Springer Science+Business Media Dordrecht
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Knowles, D.M., MacLachlan, D.W. (2001). Anisotropic Creep of Single Crystal Superalloys. In: Murakami, S., Ohno, N. (eds) IUTAM Symposium on Creep in Structures. Solid Mechanics and its Applications, vol 86. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-9628-2_4
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DOI: https://doi.org/10.1007/978-94-015-9628-2_4
Publisher Name: Springer, Dordrecht
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