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Effects of the Cr-depletion on the stress state of the sublayer of ni-base alloys oxidized in high temperature water

Ter-Ovanessian, Benoît and Andrieu, Eric and Poquillon, Dominique and Freulon, Alexandre and Cloué, Jean-Marc Effects of the Cr-depletion on the stress state of the sublayer of ni-base alloys oxidized in high temperature water. (2013) Oxidation of Metals, 79 (1-2). 73-80. ISSN 0030-770X

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Official URL: https://dx.doi.org/10.1007/s11085-012-9327-1

Abstract

The exposure in high-temperature water (300–360°C) of Alloy 600 is known to induce not only generalized corrosion, but also degradation at the underlying base metal such as intergranular penetrations of oxygen and\or oxides and Cr-depletion. Possible consequences of Cr-depletion are the creation of local stresses in the underlying metal due to local variations of the lattice parameter, and the formation of physicals properties gradient, like the elastic modulus or thermal expansion coefficient. In order to assess the effects caused by the Cr-depletion on an exposed Alloy 600, finite element (FE) calculations and physical properties characterisations on synthetic alloys with a chemical composition representative of different Cr-depleted layers, were performed. The levels of the calculated stresses were then discussed regarding to the other features of oxidation involved in the high temperature water stress-corrosion cracking mechanism.

Item Type:Article
Additional Information:Thanks to Springer Verlag editor. The original PDF of the article can be found at Oxidation of Metals website : https://link.springer.com/article/10.1007%2Fs11085-012-9327-1
HAL Id:hal-01755504
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Institut National des Sciences Appliquées de Lyon - INSA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Université Claude Bernard-Lyon I - UCBL (FRANCE)
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Deposited By: cirimat webmestre
Deposited On:30 Mar 2018 14:06

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