摘要
采用４３４０、１５和Ａ５０８三种结构钢，八种热处理状态；测定了它们在空气、海水和蒸馏水中的疲劳、应力腐蚀和腐蚀疲劳裂缝扩展速率，并进行了定量断口分析。在比较了叠加模型、竞争模型与实验结果的差异之后，提出了腐蚀疲劳裂缝扩展的韧带模型，拟出了该模型的计算程序。结果表明，尽管这个模型还比较粗糙，某些常数的决定还有点勉强，但由此估算的腐蚀疲劳扩展曲线，无论在形状和数值上，都与实验吻合；而它的简单方便，为工程应用提供了有利条件。
he crack growth rates of fatigue, stress corrosion and corrosion fatigue for 4340, 15 and A508 steels under various conditions were determined. A ligament model and computer program for corrosion fatigue crack propagation were presented after comparing the experimental results with predicted data from Linear Summation Model or Process Competition Model. The results showed that this simple model could predict curves of da/dN ～△K in reasonable agreement with measured data. The simplicity and convenience of this model are much helpful for engineering application.
出处
《中国腐蚀与防护学报》
CAS
CSCD
1996年第3期161-169,共9页
Journal of Chinese Society For Corrosion and Protection
关键词
腐蚀疲劳
裂缝
扩展速率
韧带模型
Corrosion fatigue, Crack growth rate, Ligament model
