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Residual stress distribution analysis of heat treated APS TBC using image based modelling

机译:基于图像建模的热处理APS TBC残余应力分布分析

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摘要

We carried out a residual stress distribution analysis in a APS TBC throughout the depth of the coatings. The samples were heat treated at 1150 °C for 190 h and the data analysis used image based modelling based on the real 3D images measured by Computed Tomography (CT). The stress distribution in several 2D slices from the 3D model is included in this paper as well as the stress distribution along several paths shown on the slices. Our analysis can explain the occurrence of the “jump” features near the interface between the top coat and the bond coat. These features in the residual stress distribution trend were measured (as a function of depth) by high-energy synchrotron XRD (as shown in our related research article entitled ‘Understanding the Residual Stress Distribution through the Thickness of Atmosphere Plasma Sprayed (APS) Thermal Barrier Coatings (TBCs) by high energy Synchrotron XRD; Digital Image Correlation (DIC) and Image Based Modelling’) (Li et al., 2017) .
机译:我们在整个涂层深度的APS TBC中进行了残余应力分布分析。将样品在1150°C下热处理190小时,数据分析基于基于图像的建模,该模型基于计算机断层扫描(CT)测量的真实3D图像。本文包括3D模型中几个2D切片中的应力分布,以及沿着切片上所示的几个路径的应力分布。我们的分析可以解释在面漆和粘结层之间的界面附近出现“跳跃”特征的情况。残余应力分布趋势中的这些特征是通过高能同步加速器XRD测量的(作为深度的函数)(如我们的相关研究文章“通过等离子喷涂(APS)热障壁的厚度了解残余应力分布”所示)高能同步加速器XRD涂层(TBC);数字图像相关性(DIC)和基于图像的建模''(Li等人,2017)。

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