Comparative study on the fretting and sliding wear properties of micro-arc oxidation-treated aluminum alloy at different temperatures
Mengjie Deng, Po Zhang, Ziye Kang, Yuze Mao, Qiwen Xiong, Wulin Zhang, Zhaobing Cai, Le Gu
Abstract
Micro-arc oxidation is an effective method to enhance surface wear resistance. This paper comparatively studies the fretting and sliding wear properties of micro-arc oxidation-treated 7075 aluminum alloy at different temperatures. Research indicates that both the untreated and MAO-coated samples exhibit peak friction coefficient values due to adhesion at elevated temperatures. At both room temperature and 150 °C, the fretting wear rate of the MAO-coated sample is lower than that of the sliding wear rate, which can be attributed to distinct surface damage mechanisms and third body behavior under different wear modes. Adhesive wear is more prominent in MAO-coated samples during high-temperature fretting compared to room temperature, while abrasive wear and spalling are more prevalent during high-temperature sliding.