The effect of stress relaxation loading cycles on the creep behaviour of 2.25Cr-1Mo pressure vessel steel

Humphries, SR; Yeung, WY; Callaghan, MD

The effect of stress relaxation loading cycles on the creep behaviour of 2.25Cr-1Mo pressure vessel steel

Humphries, SR Yeung, WY Callaghan, MD

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Publication Type:: Journal Article
Citation:: Materials Science and Engineering A, 2011, 528 (3), pp. 1216 - 1220
Issue Date:: 2011-01-25

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Field	Value	Language
dc.contributor.author	Humphries, SR	en_US
dc.contributor.author	Yeung, WY	en_US
dc.contributor.author	Callaghan, MD https://orcid.org/0000-0002-3895-4489	en_US
dc.date.issued	2011-01-25	en_US
dc.identifier.citation	Materials Science and Engineering A, 2011, 528 (3), pp. 1216 - 1220	en_US
dc.identifier.issn	0921-5093	en_US
dc.identifier.uri	http://hdl.handle.net/10453/18407
dc.description.abstract	This paper investigates the effects of repeated stress relaxation loadings and post stress relaxation creep to assess the stress relaxation-creep interaction and microstructural evolution of 2.25Cr-1Mo steel. Prior to creep testing, the microstructure of the material subjected to stress relaxation exhibited a structure which was non-conservative in predicting the remaining creep life of the material. The results obtained in the test program showed that the damage due to the effects of stress relaxation was crucial and had a significant effect on the creep life of this material. The study has also shown that the extent of metallurgical degradation, due to stress relaxation, may not be evident through microstructural assessment. Consequently, established life assessment procedures may not represent conservative estimates of remaining life because the microstructural indicators of damage, due to stress relaxation, are not evident. The effects of stress relaxation on the creep properties of ferritic pressure vessel steel are life limiting for critical high temperature power generation plant. In this study a comprehensive test program has been undertaken to assess the interaction of stress relaxation with creep and microstructural evolution in 2.25Cr-1Mo steel. © 2010 Elsevier B.V.	en_US
dc.relation.ispartof	Materials Science and Engineering A	en_US
dc.relation.isbasedon	10.1016/j.msea.2010.10.014	en_US
dc.subject.classification	Materials	en_US
dc.title	The effect of stress relaxation loading cycles on the creep behaviour of 2.25Cr-1Mo pressure vessel steel	en_US
dc.type	Journal Article
utslib.citation.volume	3	en_US
utslib.citation.volume	528	en_US
utslib.for	0912 Materials Engineering	en_US
utslib.for	0910 Manufacturing Engineering	en_US
utslib.for	0913 Mechanical Engineering	en_US
dc.location.activity	Wingate Institute, Israel
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Chemistry and Forensic Science
utslib.copyright.status	closed_access
pubs.issue	3	en_US
pubs.publication-status	Published	en_US
pubs.volume	528	en_US

Abstract:

This paper investigates the effects of repeated stress relaxation loadings and post stress relaxation creep to assess the stress relaxation-creep interaction and microstructural evolution of 2.25Cr-1Mo steel. Prior to creep testing, the microstructure of the material subjected to stress relaxation exhibited a structure which was non-conservative in predicting the remaining creep life of the material. The results obtained in the test program showed that the damage due to the effects of stress relaxation was crucial and had a significant effect on the creep life of this material. The study has also shown that the extent of metallurgical degradation, due to stress relaxation, may not be evident through microstructural assessment. Consequently, established life assessment procedures may not represent conservative estimates of remaining life because the microstructural indicators of damage, due to stress relaxation, are not evident. The effects of stress relaxation on the creep properties of ferritic pressure vessel steel are life limiting for critical high temperature power generation plant. In this study a comprehensive test program has been undertaken to assess the interaction of stress relaxation with creep and microstructural evolution in 2.25Cr-1Mo steel. © 2010 Elsevier B.V.

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http://hdl.handle.net/10453/18407