Yang Hui-Hui, Wang Xi-Shu, Wang Ya-Ming, Wang Yan-Ling, Zhang Zhi-Hao
Department of Engineering Mechanics, School of Aerospace Engineering, AML, Tsinghua University, Beijing 100084, China.
Institute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150001, China.
Materials (Basel). 2017 Jun 2;10(6):609. doi: 10.3390/ma10060609.
Rotating bending fatigue tests have been performed to evaluate the corrosion fatigue performance and its influence factors of 7075-T7351 Al alloy in different media, namely air and a 5.0 wt % NaCl aqueous solution. All samples were coated by microarc oxidation (MAO) coating technology; some samples were followed by an epoxy resin pore-sealing treatment. Microscopic analyses of the surfaces and fracture cross-sections of samples were carried out. The results reveal that the sample with a MAO coating of 10 μm thickness and pore-sealing treatment by epoxy resin possesses optimal corrosion fatigue performance in the different media. The MAO coating with a pore-sealing treatment significantly improves the corrosion fatigue limit of 7075-T7351 Al alloy.
进行了旋转弯曲疲劳试验，以评估7075-T7351铝合金在不同介质（即空气和5.0 wt%氯化钠水溶液）中的腐蚀疲劳性能及其影响因素。所有样品均采用微弧氧化（MAO）涂层技术进行涂层处理；部分样品随后进行了环氧树脂封孔处理。对样品的表面和断裂横截面进行了微观分析。结果表明，厚度为10μm的MAO涂层且经环氧树脂封孔处理的样品在不同介质中具有最佳的腐蚀疲劳性能。经过封孔处理的MAO涂层显著提高了7075-T7351铝合金的腐蚀疲劳极限。
