Influence of the Interfacial Roughness on Residual Stress Analysis of Thick Film Systems by Incremental Hole Drilling
Influence of the Interfacial Roughness on Residual Stress Analysis of Thick Film Systems by Incremental Hole Drilling
复制标题
界面粗糙度对渐进式钻孔厚膜系统残余应力分析的影响
DOI：
10.4028/www.scientific.net/msf.768-769.136
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
J. Gibmeier
中科院分区：
文献类型：
--
作者：
E. Obelode;J. Gibmeier
涂层厚度在50到1000 μ m之间的厚膜系统通常通过热喷涂工艺制造。在沉积过程中，由于基材的预处理，产生了影响涂层性能的残余应力。由于基材预处理，热喷涂涂层表现出较大的界面粗糙度。研究了增量钻孔法在热喷涂涂层中的应用。重点研究了界面粗糙度对残余应力评价的影响。为了使残余应力评估的最终误差最小化，进行了系统的有限元研究。将仿真结果转化为热喷涂模型厚膜系统的钻孔实验结果。最后，将钻孔结果与x射线衍射测定的残余应力深度剖面进行比较，并结合连续电化学去除层。结果表明，如果在标定函数/参数计算中适当考虑平均涂层厚度，则可以忽略界面粗糙度对残余应力计算的影响。
Thick film systems with coating thicknesses between 50 and 1000 µm are often fabricated by thermal spray processes. During the deposition and due to the substrate pre-treatment residual stresses, which influence the coating properties, develop. Due to the substrate preconditioning thermal spray coatings exhibit a large interfacial roughness. This study investigates the application of the incremental hole-drilling method on thermal spray coatings. The focus is on the influence of the interfacial roughness on the residual stress evaluation. A systematic FE-study was carried out in order to minimize the final error for the residual stress evaluation. The simulation results are transferred to experimental hole-drilling results of a thermally sprayed model thick film system. Finally, the hole-drilling results are compared to the residual stress depth profile that was determined by X-ray diffraction in combination with successive electrochemical layer removal. The results clearly show that the effect of the interfacial roughness can be neglected for residual stress calculation if the mean coating thickness is properly considered for calculation of the calibration function / parameters.