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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, vol. 375 (n° 1). pp. 95-101. ISSN 0022-3115

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

Abstract

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 definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Journal of Nuclear Materials website : http://www.sciencedirect.com/science/journal/00223115
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > AREVA (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS
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Deposited By:Celine Cabaup

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