Abstract In this work, a General Corrosion Fatigue Model (GCFM) was developed for predicting corrosion fatigue crack growth rate (CFCGR) in metals under cyclical loading. The GCFM is based on an equation for the potential drop from the external surface to the crack tip of metals as derived from the principle of differential aeration. Development of the GCFM involves consideration of cyclic loading on the CFCGR and of advection between the in-crack and external environment. We demonstrate the influence of corrosion environment and cyclic loading on the crack growth rate in Al-Li alloys in a 1:1 electrolyte (0.6 M NaCl).

中文翻译：

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合金腐蚀疲劳裂纹增长率的预测。第一部分：航空航天铝合金的一般腐蚀疲劳模型

摘要 在这项工作中，开发了一种通用腐蚀疲劳模型 (GCFM)，用于预测循环载荷下金属的腐蚀疲劳裂纹扩展率 (CFCGR)。GCFM 是基于从外表面到金属裂纹尖端的电位降的方程，该方程源自差分曝气原理。GCFM 的开发涉及考虑 CFCGR 上的循环载荷以及裂缝内和外部环境之间的平流。我们证明了腐蚀环境和循环载荷对 Al-Li 合金在 1:1 电解质（0.6 M NaCl）中裂纹扩展速率的影响。