Cyclic behavior of 9–12% Cr steel under different control modes in low cycle regime: A comparative study
Source abstract
Abstract
Abstract Cyclic behavior of 9–12% Cr steel under both stress and strain control modes was investigated at 873 K. Significant asymmetric deformation and cyclic softening were observed for both modes. Under the strain-controlled fatigue, a strain level-independent softening factor (SF) was observed. The SF was dependent on applied stress under the stress-controlled fatigue. For the strain-controlled fatigue, the magnitude of cyclic asymmetry decreases with the increase of strain amplitude, while under the stress-controlled fatigue, the asymmetry increases with the increase of stress amplitude. The anomalous ratcheting strain resulted from the asymmetry under the stress-controlled mode has a detrimental effect on fatigue life.
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Research context
OpenAlex topics: High Temperature Alloys and Creep · Fatigue and fracture mechanics · Microstructure and Mechanical Properties of Steels
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