Residual Stress Analysis of Ceramic Coating by Laser Ablation and Digital Holography
Residual Stress Analysis of Ceramic Coating by Laser Ablation and Digital Holography
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DOI：
10.1007/s11340-015-0120-3
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发表时间：
2016-06-01
影响因子：
2.4
通讯作者：
Osten, W.
中科院分区：
文献类型：
--
作者：
Pedrini, G.;Martinez-Garcia, V.;Osten, W.
本文介绍了一种利用激光准无损去除陶瓷涂层，并用高分辨率数字全息术测量加工区域周围的三维位移来分析陶瓷涂层残余应力的方法。根据测量的三维位移、加工孔的轮廓以及涂层和基材的材料参数，利用有限元方法进行了数值计算，得到了残余应力。文中给出了热喷涂涂层的实验结果，并讨论了该方法的困难、正在进行的工作、该方法的潜力以及用打孔法进行的对比测量。
In this paper, a method for residual stress analysis of ceramic coatings by applying a laser for quasi non-destructive material removal and measuring the 3D displacement around the machined area by means of high-resolution digital holography is described. The residual stresses are retrieved by numerical calculations using the finite element method (FEM) from the measured 3D displacements, the profile of the machined hole and the material parameters of the coating and substrate. Experimental results on thermal spray coatings together with discussion of the difficulties, work in progress, potential of the method, and comparative measurements by the hole-drilling method are presented.