A Micro-Mechanism-Based Continuum Corrosion Fatigue Damage Model for Steels

作者：Sun, Bin^*; Li, Zhaoxia

来源：Journal of Materials Engineering and Performance, 2018, 27(5): 2586-2594.

DOI：10.1007/s11665-018-3333-7

• continuum damage
• corrosion fatigue
• micro-mechanism
• pit
• short crack
• steel

A micro-mechanism-based corrosion fatigue damage model is developed for studying the high-cycle corrosion fatigue of steel from multi-scale viewpoint. The developed physical corrosion fatigue damage model establishes micro-macro relationships between macroscopic continuum damage evolution and collective evolution behavior of microscopic pits and cracks, which can be used to describe the multi-scale corrosion fatigue process of steel. As a case study, the model is used to predict continuum damage evolution and number density of the corrosion pit and short crack of steel component in 5% NaCl water under constant stress amplitude at 20 kHz, and the numerical results are compared with experimental results. It shows that the model is effective and can be used to evaluate the continuum macroscopic corrosion fatigue damage and study microscopic corrosion fatigue mechanisms of steel.

• 出版日期2018-5
• 单位东南大学