Life prediction of P91 piping accounting for creep fatigue conditions. (4th July 2022)

• Record Type: Journal Article
• Authors: Lo Conte, A.; Bassi, F.; Beretta, S.; Foletti, S.; Cristea, M. E.
• Is Part Of: Materials at high temperatures. Volume 39:Number 4(2022)
• Page Start: 328
• Page End: 339
• Publication Date: 2022-07-04
• Subjects: Creep-Fatigue crack growth -- P91 steel -- TDFAD -- (Ct)avg parameter; Materials at high temperatures -- Periodicals; High temperatures -- Periodicals; 620.1121705
• DOI: 10.1080/09603409.2022.2123124
• Languages: English
• ISSNs: 0960-3409

Abstract

ABSTRACT: To address the lack of available standard codes that deal with interactions between creep and fatigue, which is generally approached with a simple superposition law, the ( C t ) a v g parameter associated with CFCG is introduced, under the hypothesis of partial creep strain reversal based on the creep reversal parameter C R . The TDFAD methodology used to predict initial crack growth during creep and creep-fatigue regime with P91 grade steel operating at 600°C is reviewed and integrated. This state-of-the-art crack tip parameter is introduced and accounts for small-scale creep, in the creep-fatigue crack propagation assessment.