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Synergistic anodic dissolution and hydrogen embrittlement in stress corrosion cracking of high-strength steels: Mechanisms and multiscale dynamics
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DOI：10.1016/j.engfracmech.2026.112101.png)
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Abstract
En 中文
Stress corrosion cracking (SCC) in high-strength steels critically threatens structural integrity across aerospace, maritime, and energy sectors. While SCC involves multiple synergistic damage mechanisms, traditional models often oversimplify by isolating anodic dissolution (AD) and hydrogen embrittlement (HE). This study employs a novel multi-physics coupling framework that simultaneously integrates AD and HE fracture mechanisms to numerically simulate corrosion damage behavior in high-strength steels. Addressing the intricate coupling challenges among the multiple physical fields involved in AD and HE fracture, thereby enabling predictive assessment of the service lifetime of high-strength steel components. The framework employs a phase-field approach to model crack evolution, incorporating mechanical-electrochemical interactions to predict SCC damage rates. Simulations reveal a transition from AD-dominated damage initiation to HE-driven crack propagation, highlighting that a high critical strain for passive film rupture significantly retards the AD rate. Furthermore, elevated hydrogen concentrations within the reaction environment substantially reduce the material's load-bearing capacity and accelerate crack growth during the HE stage. Predictions of SCC damage rates exhibit errors within 20% compared to experimental data. This work not only advances the fundamental understanding of synergistic SCC mechanisms but also offers a computational tool for assessing the operational safety of highstrength steel components in demanding environments.
Keywords:
Stress corrosion cracking
Hydrogen embrittlement fracture
Anodic dissolution
Multi-physics coupling framework
High-strength steel
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