Correlation and capability of using site inspection data and small specimen creep testing for a service-exposed CrMoV pipe section

Cacciapuoti, Bianca; Morris, A.; Sun, Wei; McCartney, D.G.; Hulance, J.

Abstract

This paper presents for the first time an investigation on the creep damage evolution of an ex-service CrMoV pipe section through impression creep test and metallurgical inspection data. The study emphasises the importance of correlating the operating conditions (temperature and stress) of power plant components with the results from metallurgical examinations and small specimen creep tests.

The paper seeks for a correlation among micro- and macro-hardness measurements, surface replicas data and minimum creep strain rates (obtained by impression creep tests) of the parent material of the pipe section. Also, optical and SEM micrographs have been used to assess possible metallurgical differences through the thickness of the pipe section. This investigation shows how miniature creep test specimen data could be practically used in a holistic approach for the evaluation of life consumption of power plant components and concludes that the studied parent material could have been retired from service too early.

Citation

Cacciapuoti, B., Morris, A., Sun, W., McCartney, D., & Hulance, J. (2018). Correlation and capability of using site inspection data and small specimen creep testing for a service-exposed CrMoV pipe section. Materials at High Temperatures, 36(2), 173-186. https://doi.org/10.1080/09603409.2018.1503148

• Journal Article Type: Article
• Acceptance Date: Jul 13, 2018
• Online Publication Date: Aug 6, 2018
• Publication Date: Aug 6, 2018
• Deposit Date: Jul 16, 2018
• Publicly Available Date: Aug 7, 2019
• Journal: Materials at High Temperatures
• Print ISSN: 0960-3409
• Electronic ISSN: 1878-6413
• Publisher: Taylor and Francis
• Peer Reviewed: Peer Reviewed
• Volume: 36
• Issue: 2
• Pages: 173-186
• DOI: https://doi.org/10.1080/09603409.2018.1503148
• Keywords: CrMoV Pipe; Hardness; Impression creep; Replica; Site inspection data
• Public URL: https://nottingham-repository.worktribe.com/output/946216
• Publisher URL: https://www.tandfonline.com/doi/abs/10.1080/09603409.2018.1503148
• Additional Information: This is an Accepted Manuscript of an article published by Taylor & Francis in Materials at High Temperatures on 6 August 2018, available online: http://www.tandfonline.com/10.1080/09603409.2018.1503148
• Contract Date: Jul 16, 2018