A combined elastic–plastic framework unifying the various cyclic softening/hardening behaviors for heat resistant steels: Experiment and modeling

• Published in: International journal of fatigue Vol. 158; p. 106736
• Main Authors: Song, Kai, Wang, Kaimeng, Zhao, Lei, Xu, Lianyong, Han, Yongdian, Hao, Kangda
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.05.2022; Elsevier BV
• Subjects: Austenitic stainless steels; Constitutive models; Cyclic elastic–plastic model; Dislocation density; Dislocation mobility; Fatigue tests; Grain structure; Hardening-softening behavior; Heat resistant steels; High temperature; High temperature low cycle fatigue; Hysteresis loops; Low cycle fatigue; Martensitic stainless steels; Materials fatigue; Mathematical models; Microstructure mechanism; Plastic deformation; Secondary hardening; Softening; Strain; Thermal cycling; Microstructure mechanism; High temperature low cycle fatigue; Hardening-softening behavior; Cyclic elastic–plastic model

•Cyclic softening, cyclic hardening–softening and cyclic hardening–softening–secondary hardening behaviors were investigated.•A novel factor was introduced to describe the transition of back stress evolution for a wide range of cases.•The isotropic hardening yield surface was modified by two terms o...