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首页> 外文会议>Leeds-Lyon Symposium on Tribology; 19990914-17; Leeds(GB) >Rebound hardness of electroplated coatings
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Rebound hardness of electroplated coatings

机译：电镀涂层的回弹硬度

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摘要

The effects of mechanical properties of substrate and coating thickness on the effective rebound hardness of electroplated nickel surfaces were studied in the light of the comparison with a previous study for the Vickers hardness. Three kinds of hammer are used to elucidate the effects of the mass of the hammer and the radius of curvature of the indenter. The motion of hammer was measured using the laser Doppler vibrometer, and was also analyzed using the elastoplastic finite-element method. The impact force and the coefficient of restitution for the hammer with a fixed mass and falling height increase with increasing radius of curvature of the indenter. It has also found that there exists the critical coating thickness, over which the substrate does not influence the measurement. The critical coating thickness increases with increasing mass of the hammer and increasing radius of curvature of the indenter, and depends on the size of the plastic zone in the coating.
机译：根据与以前的维氏硬度研究的比较，研究了基材的机械性能和涂层厚度对电镀镍表面的有效回弹硬度的影响。使用三种锤子来阐明锤子质量和压头曲率半径的影响。使用激光多普勒振动计测量锤的运动，并使用弹塑性有限元方法进行分析。具有固定质量和下降高度的锤的冲击力和恢复系数随着压头的曲率半径的增加而增加。还发现存在临界涂层厚度，在该临界涂层厚度上基材不会影响测量。临界涂层厚度随着锤子质量的增加和压头的曲率半径的增加而增加，并且取决于涂层中塑料区域的大小。

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