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Predicting the onset of rafting of c 0 precipitates by channel deformation in a Ni superalloy

Ratel-Ramond, Nicolas and Calderon, H. A. and Mori, T. and Withers, P.J. Predicting the onset of rafting of c 0 precipitates by channel deformation in a Ni superalloy. (2010) Philosophical Magazine, vol. 90 (n° 5). pp. 585-597. ISSN 1478-6435

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Official URL: http://dx.doi.org/10.1080/14786430903213338

Abstract

The growth or shrinkage, normal to 001, of the interfaces between the γ matrix and cuboidal γ' precipitates is examined for a Ni-base superalloy, by considering the force acting on the interfaces. The force is produced by the precipitate coherency misfit and the stress produced by plastic deformation in channels of the γ matrix. A simple expression, which directly addresses the origin of the surface force, is given. The plastic deformation within the initially active γ matrix channels exerts the force to cause rafting. The subsequent activation of other types of channels also promotes the rafting in the same direction as the first active channels, when the plastic strain of the former channels increases. These issues are also discussed in terms of analysis based on those dislocations caused by the precipitate misfit and those produced by the plastic deformation.

Item Type:Article
Additional Information:Thanks to Taylor & Francis editor. The definitive version is available at http://www.informaworld.com/smpp/home~db=all The original PDF of the article can be found at Philosophical Magazine website : http://www.informaworld.com/smpp/title~content=t713695589~link=cover
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Other partners > Instituto Politécnico Nacional - IPN (MEXICO)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > University of Manchester (UNITED KINGDOM)
Laboratory name:
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Deposited By:Leila Abdelouhab

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