文献类型：期刊文献

英文题名：Measurement of Micro Region Creep Deformation in the Multi-Layer Coating with Digital Speckle Correlation System

作者：Chen, Jianjun[1];Zhang, Hongyu[1];Tu, Shantung[1];Xuan, Fuzhen[1];Wang, Zhengdong[1]

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2010

卷号：38

期号：5

起止页码：609

外文期刊名：JOURNAL OF TESTING AND EVALUATION

收录：;EI(收录号：20104313329200);WOS:【SCI-EXPANDED(收录号:WOS:000282034800010)】；

基金：The work was supported by the National Science Foundation of China (Grant No. 50905060) and Shanghai Natural Science Fund (Grant No. 09ZR1408000). The writers are also grateful to Professor Xi Zhang for his kind help to establish the measuring system.

语种：英文

外文关键词：creep strain measurement; micro region; image analysis; digital speckle; correlation method

摘要：A micro region measuring system has been developed to achieve the time-dependent deformation of multi-layer coating at high temperature. The proposed system uses a long-distance microscope and digital speckle correlation method to evaluate the full creep strain fields, which is especially suited for the long-term measurement of the nonuniform deformation. The creep tension tests are performed to obtain the creep strain distribution and evolution inside the thermal barrier coating specimen. According to the deformation measured from different micro regions, we obtained some fundamental knowledge about the time-dependent behavior of the failure mechanism in multi-layer coatings. The accuracy of the new measuring system and the corresponding error analyses are also discussed in this paper.