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Creep and tensile behaviour of austenitic Fe–Cr–Ni stainless steels

Voicu, Raluca and Lacaze, Jacques and Andrieu, Eric and Poquillon, Dominique and Furtado, Jader Creep and tensile behaviour of austenitic Fe–Cr–Ni stainless steels. (2009) Materials Science and Engineering A, vol. 510-511 . pp. 185-189. ISSN 0921-5093

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Official URL: http://dx.doi.org/10.1016/j.msea.2008.04.098

Abstract

The control of creep behaviour during service of reformer tubes made of HP-40 austenitic stainless steels is still limited by the knowledge of creep mechanisms in these alloys. Two different HP-40 alloys modified with a low-level addition ofNbwere studied. Creep testswere carried out at 980 and 1050 ◦C with different stress levels, in the range of 20–50MPa, and their resultswere plotted in a Norton-type diagram. Also, low strain rate tensile tests were performed at temperature of 950, 980 or 1000 ◦C. As low strain rate tensile tests showed a plateau at nearly constant stress for a given strain rate, they could be somehow linked with creep tests. Accordingly, tensile and creep results were plotted together on a Larson–Miller (LMP) diagram. The fracture modes of tensile and creep samples were investigated and the effect of different parameters such as sample dimensions, temperature and atmosphere, was also studied.

Item Type:Article
Additional Information:This article is a part of 11th International Conference of Creep and Fracture of Engineering Materials and Structures, CREEP 2008. Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Materials Science and Engineering A website : http://www.sciencedirect.com/science/journal/09215093
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Air Liquide (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
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Deposited By:Nihad Lahdifi

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