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Thermo-mechanical fatigue testing and simulation using a viscoplasticity model for a P91 steel

Hyde, Christopher J.; Sun, W.; Hyde, T.H.; Saad, A.A.

Authors

Christopher J. Hyde

W. Sun

T.H. Hyde

A.A. Saad



Abstract

An experimental programme of cyclic thermo-mechanical testing for a P91 power plant steel, under isothermal, and in-phase and out-of-phase thermo-mechanical, temperature-strain cycle conditions, has been implemented. Using the experimental data, an optimisation procedure has been developed for the accurate determination of the material constants under isothermal conditions, in which the Chaboche model is employed to describe material responses. The material was found to exhibit cyclic softening throughout the full life cycles, which is believed to be related to the evolution of microstructure and the propagation of micro-cracks. The model developed shows good predictive capability of cyclic stress–strain behaviour and cyclic softening.

Journal Article Type Article
Publication Date Apr 1, 2012
Journal Computational Materials Science
Print ISSN 0927-0256
Electronic ISSN 0927-0256
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 56
APA6 Citation Hyde, C. J., Sun, W., Hyde, T., & Saad, A. (2012). Thermo-mechanical fatigue testing and simulation using a viscoplasticity model for a P91 steel. Computational Materials Science, 56, https://doi.org/10.1016/j.commatsci.2012.01.006
DOI https://doi.org/10.1016/j.commatsci.2012.01.006
Keywords Thermo-mechanical fatigue; Viscoplasticity model; Material constant optimisation; Cyclic softening
Publisher URL http://www.sciencedirect.com/science/article/pii/S0927025612000249
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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