Influence of mean stress and pressurized water reactor environment on the fatigue behavior of a 304L austenitic stainless steel
Ziling Peng
Pprime Institute, UPR 3346 CNRS ENSMA Université de Poitiers, ISAE-ENSMA, Chasseneuil-du-Poitou, France
EDF, R&D, MMC, Moret sur Loing, France
Contribution: Investigation, Writing - original draft
Search for more papers by this authorCorresponding Author
Gilbert Hénaff
Pprime Institute, UPR 3346 CNRS ENSMA Université de Poitiers, ISAE-ENSMA, Chasseneuil-du-Poitou, France
Correspondence
Gilbert Hénaff, Pprime Institute, UPR 3346 CNRS ENSMA Université de Poitiers, ISAE-ENSMA, 1 avenue Clément Ader, Futuroscope, Chasseneuil-du-Poitou 86961, France.
Email: [email protected]
Contribution: Supervision, Writing - review & editing
Search for more papers by this authorJean-Christophe Le Roux
EDF, R&D, MMC, Moret sur Loing, France
Contribution: Investigation, Writing - review & editing
Search for more papers by this authorRomain Verlet
EDF, R&D, MMC, Moret sur Loing, France
Contribution: Investigation, Writing - review & editing
Search for more papers by this authorZiling Peng
Pprime Institute, UPR 3346 CNRS ENSMA Université de Poitiers, ISAE-ENSMA, Chasseneuil-du-Poitou, France
EDF, R&D, MMC, Moret sur Loing, France
Contribution: Investigation, Writing - original draft
Search for more papers by this authorCorresponding Author
Gilbert Hénaff
Pprime Institute, UPR 3346 CNRS ENSMA Université de Poitiers, ISAE-ENSMA, Chasseneuil-du-Poitou, France
Correspondence
Gilbert Hénaff, Pprime Institute, UPR 3346 CNRS ENSMA Université de Poitiers, ISAE-ENSMA, 1 avenue Clément Ader, Futuroscope, Chasseneuil-du-Poitou 86961, France.
Email: [email protected]
Contribution: Supervision, Writing - review & editing
Search for more papers by this authorJean-Christophe Le Roux
EDF, R&D, MMC, Moret sur Loing, France
Contribution: Investigation, Writing - review & editing
Search for more papers by this authorRomain Verlet
EDF, R&D, MMC, Moret sur Loing, France
Contribution: Investigation, Writing - review & editing
Search for more papers by this authorAbstract
Uniaxial strain-controlled fatigue tests were carried out on a 304L austenitic stainless-steel specimens in air at 300°C and in pressurized water reactor (PWR), without or with the application of a mean stress, at different total strain amplitudes. For strain amplitude no less than 0.2%, a deleterious effect of PWR water on fatigue life is observed, associated with the enhancement of both crack initiation and propagation. Besides, the fatigue life is reduced by the application of a mean stress for a fixed strain amplitude in a given environment. In particular, due to the acceleration of crack initiation stage by an enhancement of the plastic strain accumulation, the PWR water effect on fatigue life is re-activated for strain amplitude below 0.2% in the presence of a mean stress. The fatigue life reduction under mean stress application is mostly related to the maximum stress level and strain amplitude, rather than the generated ratcheting strain.
Highlights
- The results of strain-controlled fatigue tests in air and in PWR water are presented.
- The application of a mean stress affects the fatigue strength in both environments.
- The effect of environment and mean stress on initiation and propagation is analyzed.
- A modified SWT equation is proposed.
CONFLICT OF INTEREST STATEMENT
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Open Research
DATA AVAILABILITY STATEMENT
Research data are not shared.
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