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Failure Behavior of Anodized Coating-Magnesium Alloy Substrate Structures

机译:阳极氧化涂层-镁合金基底结构的失效行为

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摘要

This work focuses on the damage mechanisms and the resulting failure behavior of structures made of anodized coatings on magnesium alloy substrates. The failure of anodized coatings of about 30μm thickness on AZ91D substrates was investigated under three-points bending loading with online scanning electron microscope (SEM) observations. The obtained SEM images show that void nucleation and crack initiation occur mainly at sites near the coating-substrate interface, and the evolutionary microcracking damage diffuses from the interface to the coating surface and also to the bulk substrate with the increase in loading.
机译:这项工作着重于镁合金基底上由阳极氧化涂层制成的结构的损伤机理和最终的失效行为。利用在线扫描电子显微镜(SEM)观察了三点弯曲载荷下AZ91D基板上约30μm厚的阳极氧化涂层的失效。所获得的SEM图像表明,空位形核和裂纹萌生主要发生在涂层-基材界面附近的位置,并且随着载荷的增加,演化的微裂纹损伤从界面扩散到涂层表面以及整个本体。

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