氧化时间对微弧氧化涂层冲击微动磨损行为的影响
首发时间:2018-04-10
摘要:采用自制的冲击微动磨损试验机,对铝合金基体材料与不同氧化时间下形成的微弧氧化涂层进行冲击磨损对比试验,并对其冲击动力学行为和磨损行为进行了分析。研究表明,微弧氧化技术能够减少基体材料的动能耗散,减少冲击接触时间,并增大冲击接触应力,且氧化时间对微弧氧化涂层的动能损失影响较大。冲击磨损试验中,基体材料的磨损程度较大,损伤机制为疲劳磨损,其磨痕轮廓呈典型的U字形;微弧氧化涂层磨损轻微,磨痕区域无明显裂纹与剥落,当氧化时间为30min和50min时,涂层的磨痕轮廓趋近于直线,磨损量几乎为零。
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Effect of oxidation time on impact fretting wear behavior of MAO Coating
Abstract: Impact wear tests of the matrix aluminum alloy and micro-arc oxidation coating formed at different oxidation time were carried out by self-made impact wear tester. The impact dynamic behavior and wear behavior were analyzed. The results showed that the micro-arc oxidation technology can reduce the kinetic energy dissipation and impact contact time, and increase the impact contact stress of the matrix material. The oxidation time had a great influence on the kinetic energy loss of the micro arc oxidation coating.The matrix material occurred severe wear in the impact wear test. The damage mechanism was fatigue wear and the wear profile showed the typical shape of U.The damage of micro-arc oxidation coating was slight. There was no obvious crack and exfoliation in the wear area. The wear profiles of the 30min and 50min coating were near to a straight line, and the wear amount was almost zero.
Keywords: micro-arc oxidation fretting wear impact kinetic energy impact force
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氧化时间对微弧氧化涂层冲击微动磨损行为的影响
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