Studies on the infrared thermography technique for quantitative nondestructive evaluation of surface crack and delamination of multilayer structures

  • Yang Yang
  • , Yang Fang
  • , Bofan Liu
  • , Jinxing Qiu
  • , Zongfei Tong
  • , Qingning Yang
  • , Haochen Liu
  • , Cuixiang Pei
  • , Shejuan Xie
  • , Zhenmao Chen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

In this paper, some researches on the laser infrared thermography (LIT) and the eddy current infrared thermography (ECIT) for quantitative nondestructive testing and evaluation of surface cracks and delamination of multilayer structures are introduced. At first, a laser array spots thermography (LAST) method for inspection of surface cracks in metallic structures is presented. LAST related measurement and image processing methods for inspection and quantitative evaluation of crack profiles are introduced in detail. Second, LIT technique and numerical analysis methods for detection and sizing of interface delamination of multilayer structures are introduced aiming at application to the in-vessel structures of Tokamak fusion reactors, such as the first wall panels of blanket modules. At last, some studies on the quantitative nondestructive evaluation of delamination of thermal barrier coating system of gas turbine blades with ECIT are given. The numerical methods for forward analysis of heat generation and transfer process of infrared thermography, and for inverse analysis of defect size with infrared thermography signals are emphasized in this paper, in addition with experimental validations of both the numerical methods and the new inspection techniques.

Original languageEnglish
Title of host publicationInternational Conference on Optical and Photonic Engineering, icOPEN 2022
EditorsChao Zuo, Shijie Feng, Haixia Wang, Qian Kemao
PublisherSPIE
ISBN (Electronic)9781510661905
DOIs
StatePublished - 2023
Event2022 International Conference on Optical and Photonic Engineering, icOPEN 2022 - Virtual, Online, China
Duration: 24 Nov 202227 Nov 2022

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume12550
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference2022 International Conference on Optical and Photonic Engineering, icOPEN 2022
Country/TerritoryChina
CityVirtual, Online
Period24/11/2227/11/22

Keywords

  • Laser infrared thermography
  • delamination
  • eddy current infrared thermography
  • forward simulation
  • inverse analysis
  • surface crack

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