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Influence of Portevin-Le Chatelier effect on rupture mode of alloy 718 specimens

Garat, Véronique and Cloué, Jean-Marc and Poquillon, Dominique and Andrieu, Eric Influence of Portevin-Le Chatelier effect on rupture mode of alloy 718 specimens. (2008) Journal of Nuclear Materials, 375 (1). 95-101. ISSN 0022-3115

(Document in English)

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Official URL: http://dx.doi.org/10.1016/j.jnucmat.2007.10.009


A set of tensile tests has been carried out under air environment in the temperature range (450–700 C) in order to characterize the interactions between oxidation assisted intergranular cracking and Portevin–Le Chatelier effect. It is shown that the occurrence of jerky flow stops the intergranular damaging mechanism. The construction of a temperature versus strain rate diagram showing dynamic strain aging, intergranular fracture and PLC instabilities locations is then proposed. The surprising relation between crack initiation disappearance and PLC instabilities of type C in the temperature range explored is discussed. Finally the assumption of the occurrence of such phenomenon at the tip of a propagating crack is addressed.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The original PDF of the article can be found at http://www.sciencedirect.com/science/journal/00223115
HAL Id:hal-03590887
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > AREVA (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Laboratory name:
Deposited On:24 Apr 2009 08:13

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