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Modelling the creep behaviour of Waspaloy under varying stresses and temperatures using the 6-θ methodology

Mark Evans, Mark Whittaker Orcid Logo, Will Harrison Orcid Logo

Materials Science and Engineering: A, Volume: 943, Start page: 148745

Swansea University Authors: Mark Evans, Mark Whittaker Orcid Logo, Will Harrison Orcid Logo

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DOI (Published version): 10.1016/j.msea.2025.148745

Abstract

In this paper an internal variables approach, set within a 6-θ methodology, is used to predict the strain rates associated with Waspaloy specimens tested under uniaxial but varying test conditions. The experimental results obtained for a simple loading and offloading cycle showed that predictions fr...

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Published in: Materials Science and Engineering: A
ISSN: 0921-5093 1873-4936
Published: Elsevier BV 2025
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URI: https://cronfa.swan.ac.uk/Record/cronfa69902
Abstract: In this paper an internal variables approach, set within a 6-θ methodology, is used to predict the strain rates associated with Waspaloy specimens tested under uniaxial but varying test conditions. The experimental results obtained for a simple loading and offloading cycle showed that predictions from such an approach were better than those obtained with a 4-θ methodology. It was also shown that the stochastic nature of creep meant that reliable predictions under variable test predictions required the use of data from repeat testing at constant test conditions. The results obtained from tests with varying but positive stresses and temperatures, showed much better strain rate predictions compared to standard time and strain hardening techniques. It also produced better predictions compared to the implementation of the internal variable approach within the 4-θ methodology.
Keywords: Waspaloy; Creep; Superalloy; Hardening Rules; 6-θ; methodology; Internal variables
College: Faculty of Science and Engineering
Funders: Swansea University
Start Page: 148745

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