Cyclic viscoplasticity testing and modeling of a service-aged P91 steel
A service-aged P91 steel was used to perform an experimental program of cyclic mechanical testing in the temperature range of 400 °C–600 °C, under isothermal conditions, using both saw-tooth and dwell (inclusion of a constant strain dwell period at the maximum (tensile) strain within the cycle) wave...
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| Format: | Article |
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American Society of Mechanical Engineers
2014
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| Online Access: | https://eprints.nottingham.ac.uk/46522/ |
| _version_ | 1848797347013722112 |
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| author | Hyde, Christopher J. Sun, Wei Hyde, T.H. Rouse, J.P. Farragher, T. O'Dowd, Noel P. Leen, S.B. |
| author_facet | Hyde, Christopher J. Sun, Wei Hyde, T.H. Rouse, J.P. Farragher, T. O'Dowd, Noel P. Leen, S.B. |
| author_sort | Hyde, Christopher J. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | A service-aged P91 steel was used to perform an experimental program of cyclic mechanical testing in the temperature range of 400 °C–600 °C, under isothermal conditions, using both saw-tooth and dwell (inclusion of a constant strain dwell period at the maximum (tensile) strain within the cycle) waveforms. The results of this testing were used to identify the material constants for a modified Chaboche, unified viscoplasticity model, which can deal with rate-dependant cyclic effects, such as combined isotropic and kinematic hardening, and time-dependent effects, such as creep, associated with viscoplasticity. The model has been modified in order that the two-stage (nonlinear primary and linear secondary) softening which occurs within the cyclic response of the service-aged P91 material is accounted for and accurately predicted. The characterization of the cyclic viscoplasticity behavior of the service-aged P91 material at 500 °C is presented and compared to experimental stress–strain loops, cyclic softening and creep relaxation, obtained from the cyclic isothermal tests. |
| first_indexed | 2025-11-14T20:02:26Z |
| format | Article |
| id | nottingham-46522 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T20:02:26Z |
| publishDate | 2014 |
| publisher | American Society of Mechanical Engineers |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-465222020-05-04T20:13:42Z https://eprints.nottingham.ac.uk/46522/ Cyclic viscoplasticity testing and modeling of a service-aged P91 steel Hyde, Christopher J. Sun, Wei Hyde, T.H. Rouse, J.P. Farragher, T. O'Dowd, Noel P. Leen, S.B. A service-aged P91 steel was used to perform an experimental program of cyclic mechanical testing in the temperature range of 400 °C–600 °C, under isothermal conditions, using both saw-tooth and dwell (inclusion of a constant strain dwell period at the maximum (tensile) strain within the cycle) waveforms. The results of this testing were used to identify the material constants for a modified Chaboche, unified viscoplasticity model, which can deal with rate-dependant cyclic effects, such as combined isotropic and kinematic hardening, and time-dependent effects, such as creep, associated with viscoplasticity. The model has been modified in order that the two-stage (nonlinear primary and linear secondary) softening which occurs within the cyclic response of the service-aged P91 material is accounted for and accurately predicted. The characterization of the cyclic viscoplasticity behavior of the service-aged P91 material at 500 °C is presented and compared to experimental stress–strain loops, cyclic softening and creep relaxation, obtained from the cyclic isothermal tests. American Society of Mechanical Engineers 2014-08 Article PeerReviewed Hyde, Christopher J., Sun, Wei, Hyde, T.H., Rouse, J.P., Farragher, T., O'Dowd, Noel P. and Leen, S.B. (2014) Cyclic viscoplasticity testing and modeling of a service-aged P91 steel. Journal of Pressure Vessel Technology, 136 (4). 044501/1-044501/5. ISSN 1528-8978 http://pressurevesseltech.asmedigitalcollection.asme.org/article.aspx?articleid=1832496 doi:10.1115/1.4026865 doi:10.1115/1.4026865 |
| spellingShingle | Hyde, Christopher J. Sun, Wei Hyde, T.H. Rouse, J.P. Farragher, T. O'Dowd, Noel P. Leen, S.B. Cyclic viscoplasticity testing and modeling of a service-aged P91 steel |
| title | Cyclic viscoplasticity testing and modeling of a service-aged P91 steel |
| title_full | Cyclic viscoplasticity testing and modeling of a service-aged P91 steel |
| title_fullStr | Cyclic viscoplasticity testing and modeling of a service-aged P91 steel |
| title_full_unstemmed | Cyclic viscoplasticity testing and modeling of a service-aged P91 steel |
| title_short | Cyclic viscoplasticity testing and modeling of a service-aged P91 steel |
| title_sort | cyclic viscoplasticity testing and modeling of a service-aged p91 steel |
| url | https://eprints.nottingham.ac.uk/46522/ https://eprints.nottingham.ac.uk/46522/ https://eprints.nottingham.ac.uk/46522/ |