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Electromagnetic pulsed thermography for natural cracks inspection

Lookup NU author(s): Yunlai Gao, Professor Gui Yun TianORCiD, Ping Wang, Dr Bin Gao, Dr Wai Lok Woo, Kongjing Li



This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


Emerging integrated sensing and monitoring of material degradation and cracks are increasingly required for characterizing the structural integrity and safety of infrastructure. However, most conventional nondestructive evaluation (NDE) methods are based on single modality sensing which is not adequate to evaluate structural integrity and natural cracks. This paper proposed electromagnetic pulsed thermography for fast and comprehensive defect characterization. It hybrids multiple physical phenomena i.e. magnetic flux leakage, induced eddy current and induction heating linking to physics as well as signal processing algorithms to provide abundant information of material properties and defects. New features are proposed using 1st derivation that reflects multiphysics spatial and temporal behaviors to enhance the detection of cracks with different orientations. Promising results that robust to lift-off changes and invariant features for artificial and natural cracks detection have been demonstrated that the proposed method significantly improves defect detectability. It opens up multiphysics sensing and integrated NDE with potential impact for natural understanding and better quantitative evaluation of natural cracks including stress corrosion crack (SCC) and rolling contact fatigue (RCF).

Publication metadata

Author(s): Gao Y, Tian GY, Wang P, Wang HT, Gao B, Woo WL, Li KJ

Publication type: Article

Publication status: Published

Journal: Scientific Reports

Year: 2017

Volume: 7

Online publication date: 07/02/2017

Acceptance date: 04/01/2017

Date deposited: 24/02/2017

ISSN (electronic): 2045-2322

Publisher: Springer Nature


DOI: 10.1038/srep42073


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Funder referenceFunder name
China Scholarship Council
Fundamental Research Funds for the Central Universities
269202EU FP7 "Health Monitoring of Offshore Wind Farms (HEMOW)" project
51377015National Natural Science Foundation of China
61401071National Natural Science Foundation of China
61527803National Natural Science Foundation of China
KYLX_0253Jiangsu Innovation Program for Graduate Education