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Anelasticity in austenitic stainless steel

Rao, Ashwin; Bouchard, P. John; Northover, Shirley M. and Fitzpatrick, Michael E. (2012). Anelasticity in austenitic stainless steel. Acta Materialia, 60(19) pp. 6851–6861.

DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1016/j.actamat.2012.08.060
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Abstract

Time-dependent anelastic deformation mechanisms arise in austenitic stainless steel when load is removed during a high-temperature creep test. This phenomenon is investigated by conducting creep tests, with intermittent load removal, on AISI Type 316H austenitic stainless steel at 550 and 650 °C, supported by in situ measurement of creep-induced intergranular residual strains by neutron diffraction. All the cyclic tests exhibit anelastic behaviour on unloading and develop substantially lower load-on creep strain rates, reduced ductility and longer rupture times than baseline steady-load creep tests at similar conditions. The mechanisms underlying the observed anelastic behaviour and changes in macroscopic creep properties are discussed with reference to the development of intergranular strains and dislocation behaviour.

Item Type: Journal Article
Copyright Holders: 2012 Acta Materialia Inc.
ISSN: 1359-6454
Keywords: creep test; neutron diffraction; transmission electron microscopy (TEM); austenitic steel
Academic Unit/Department: Mathematics, Computing and Technology > Engineering & Innovation
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Item ID: 34428
Depositing User: Michael E. Fitzpatrick
Date Deposited: 02 Oct 2012 08:40
Last Modified: 18 Nov 2013 09:47
URI: http://oro.open.ac.uk/id/eprint/34428
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