title: Eddy Current Pulsed Thermography with Different Excitation Configurations for Metallic Material and Defect Characterization.
abstract: This paper reviews recent developments of eddy current pulsed thermography (ECPT) for material characterization and nondestructive evaluation (NDE). Due to the fact that line-coil-based ECPT, with the limitation of non-uniform heating and a restricted view, is not suitable for complex geometry structures evaluation, Helmholtz coils and ferrite-yoke-based excitation configurations of ECPT are proposed and compared. Simulations and experiments of new ECPT configurations considering the multi-physical-phenomenon of hysteresis losses, stray losses, and eddy current heating in conjunction with uniform induction magnetic field have been conducted and implemented for ferromagnetic and non-ferromagnetic materials. These configurations of ECPT for metallic material and defect characterization are discussed and compared with conventional line-coil configuration. The results indicate that the proposed ECPT excitation configurations can be applied for different shapes of samples such as turbine blade edges and rail tracks.
authors.affiliation: School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China. g.y.tian@uestc.edu.cn.|School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK. g.y.tian@uestc.edu.cn.
authors.forename: Gui Yun
authors.initials: GY
authors.lastname: Tian
authors.affiliation: School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK. Y.Gao28@newcastle.ac.uk.|College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China. Y.Gao28@newcastle.ac.uk.
authors.forename: Yunlai
authors.initials: Y
authors.lastname: Gao
authors.affiliation: School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK. k.li3@newcastle.ac.uk.
authors.forename: Kongjing
authors.initials: K
authors.lastname: Li
authors.affiliation: School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China. wangyizhe617525@163.com.
authors.forename: Yizhe
authors.initials: Y
authors.lastname: Wang
authors.affiliation: School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China. bin_gao@uestc.edu.cn.
authors.forename: Bin
authors.initials: B
authors.lastname: Gao
authors.affiliation: School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK. hijacker@163.com.|College of Electrical and Information Engineering, Hunan University, Changsha 410082, China. hijacker@163.com.
authors.forename: Yunze
authors.initials: Y
authors.lastname: He
keywords: eddy current pulsed thermography (ECPT); excitation configuration; material characterization; multi-physical phenomenon; nondestructive evaluation (NDE)