Microstructural Model for Creep-Fatigue Interaction in Grade 91 Steel

Technical Report · Mon Mar 01 04:00:00 EST 2021

DOI:https://doi.org/10.2172/1772468· OSTI ID:1772468

Messner, Mark Christian ^[1]; Venkataraman, Ajey ^[1]; Rovinelli, Andrea ^[1]; Sham, Ting-Leung ^[2]

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1. Argonne National Lab. (ANL), Argonne, IL (United States)
2. Idaho National Lab. (INL), Idaho Falls, ID (United States)

This report describes the completion of a crystal plasticity finite element simulation framework for creep-fatigue deformation and damage in Grade 91 steel. In addition to a description of the framework and a set of verification calculations, the report details an initial set of simulations applying the framework to examine low cycle fatigue and creep-fatigue interaction in Grade 91 at 600° C. Grade 91 is a likely material for future advanced microreactors and creep-fatigue will be a limiting structural damage mechanism, particularly for mobile reactors or load following systems. The framework described here could provide a better understanding of creep-fatigue damage mechanisms and directly examine creep, fatigue, and creep-fatigue interaction for Grade 91 at realistic component service conditions. This in turn could lead to improved design methods and component life estimation approaches, leading to more efficient and economical component designs.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Nuclear Energy (NE)
• DOE Contract Number: AC02-06CH11357; AC05-00OR22725
• OSTI ID: 1772468
• Report Number(s): ANL-ART--218; 167044
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE