Abstract
Abstract
In order to investigate the fatigue behavior of the hydrogen storage material, 30CrMo steel, in a hydrogen environment, an electrochemical hydrogen charging method was employed. Low-cycle fatigue experiments were conducted on the material to obtain half-life stress–strain hysteresis curves, cyclic response characteristics, and strain-life relationships under different hydrogen charging durations. The results indicate that the material exhibited an overall cyclic softening behavior, transitioning from ductile fracture to brittle fracture after hydrogen charging, resulting in a significant reduction in fatigue life. The Manson-Coffin formula was fitted based on material cyclic response characteristics and strain-life relationship curves. Additionally, fatigue toughness and Chaboche kinematic hardening models were fitted based on low-cycle fatigue test data. Finite element analysis was used to validate the accuracy and reliability of the Chaboche kinematic hardening model. The Chaboche kinematic hardening model showed minimal error compared to experimental data and accurately described the influence of hydrogen on the low-cycle fatigue mechanical behavior of 30CrMo steel.
Funder
National Natural Science Foundation project of China
Open Fund for Key Laboratory of Deep Earth Science and Engineering, Ministry of Education
Open Project of Sichuan Provincial Key Laboratory of Disaster Mechanics and Engineering Disaster Prevention and Reduction
Open Fund of Sichuan Provincial Key Laboratory of Advanced Control Equipment and Control Engineering
Open Fund of Sichuan Provincial Key Laboratory for the Comprehensive Utilization of Vanadium and Titanium Resources
Subject
Metals and Alloys,Polymers and Plastics,Surfaces, Coatings and Films,Biomaterials,Electronic, Optical and Magnetic Materials