Fractograph and microstructure analyses with scanning electron microscoy (SEM) and optical microscoy (OM) were conducted to determine the corrosion fatigue crack initiation and propagation mode.

• 此外，亦利用光学显微镜(OM)和扫描式电子显微镜(SEM)，对金相组织与破断面加以观察分析，以瞭解裂缝的生成及成长模式。