Joint effect of residual stress and plastic deformation on pulsed eddy current response signals in 304 austenitic stainless steel

Bai, Peigen; Shi, Pengpeng; Zhao, Yingsong; Chen, Hongen; Xie, Shejuan; Chen, Zhenmao

doi:10.3233/jae-190124

Cited by 6 publications

(3 citation statements)

References 18 publications

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“…where f and g are both functions of σ eq and ε eq , σ eq is the equivalent stress, ε eq is the equivalent strain, respectively, 2 Journal of Sensors μ 0 is the magnetic permeability in vacuum, μ r is the initial relative permeability, and γ 0 is the initial conductivity [9].…”

Section: Strain Detection Principle Of Eddy Current Effectmentioning

confidence: 99%

“…The Q235 steel used in this experiment has a crosssectional area A of 150 and Young's modulus E of 196 to 216 GPa, commonly assumed in engineering calculations to be 200 GPa. Substituting the expression for F N in Equation ( 12) and the constants E and A into Equation (9). The linear relationship between strain ε and RMS voltage value Vol can be calculated as…”

Section: Calibration Of Strain In Elasticmentioning

confidence: 99%

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Real‐Time Strain Detection Technology for Steel Structures Based on Eddy Current Effect

Jin

Zheng

et al. 2023

Journal of Sensors

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To avoid strains in steel structures in special equipment caused by excessive alternating loads, which cause stress concentrations in local areas and reduce the strength and pressure-bearing capacity of the steel structures, a method for evaluating the strain state of the steel structures using the eddy current effect is proposed, and the relevant testing device is developed. The RMS voltage and tension values were tested and fitted linearly with sampling time, and their linear correlations after fitting were 0.9978560 and 0.9967905, respectively. To investigate the method’s practical application, the effect of strain on the impedance of the eddy current probe was first studied theoretically, followed by the design and fabrication of a strain detection device comprised of an eddy current probe and a signal processing system. Finally, tensile strain experiments were carried out on 5 mm thick standard Q235 steel tensile specimens using a universal tensile machine and the linear equation of RMS voltage versus strain was obtained analytically. Theoretical and experimental tests have shown that the device can detect each strain stage and quantify the strain within the elastic stage by fitting a linear equation.

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Section: Strain Detection Principle Of Eddy Current Effectmentioning

confidence: 99%

Section: Calibration Of Strain In Elasticmentioning

confidence: 99%

Real‐Time Strain Detection Technology for Steel Structures Based on Eddy Current Effect

Jin

Zheng

et al. 2023

Journal of Sensors

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“…Among available electromagnetic NDT tools, eddy current testing is rapid and convenient for in-line system integration. The theoretical basis and successful applications of eddy current in the evaluation of the plastic strain in ferromagnetic materials have been reported [8][9][10][11][12] to highlight the significant dependency of the eddy current responses on the plastic strain. However, most of the experiments were carried out in the default case that the principal direction of plastic deformation was already known or the generated unidirectional eddy current field was parallel to the principal direction of plastic deformation.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Residual Plastic Deformation in Low-Carbon Steel with the Oscillatory Rotating Eddy Current Method

et al. 2021

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Residual plastic deformation induced in low-carbon steels usually demonstrates anisotropy. Eddy current method is applicable for the residual plastic deformation evaluation. However, it is difficult to efficiently evaluate both the principal strain direction and magnitude of residual plastic deformation with the conventional eddy current method. To solve these limitations, a novel method of oscillatory rotating eddy current (OREC) was developed and successfully applied in characterizing the anisotropy of residual plastic deformation in low-carbon steels. The parameters of eddy current response obtained under different frequencies were extracted to characterize the plastic deformation and then the characterization performances of extracted parameters were compared. The compound voltage signal and real part of the impedance could better characterize the residual plastic deformation than the imaginary part of the impedance. It was found that the angle of the major axis of the selected 8-shaped patterns measured with OREC was a good indicator of the principal strain direction. As the residual plastic deformation was increased, the length of the major axis of the 8-shaped patterns monotonously increased despite its sensitivity to the plastic deformation was frequency-dependent.

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Overview of Researches on the Nondestructive Testing Method of Metal Magnetic Memory: Status and Challenges

Shi

Chen

2020

J Nondestruct Eval

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Joint effect of residual stress and plastic deformation on pulsed eddy current response signals in 304 austenitic stainless steel

Cited by 6 publications

References 18 publications

Real‐Time Strain Detection Technology for Steel Structures Based on Eddy Current Effect

Real‐Time Strain Detection Technology for Steel Structures Based on Eddy Current Effect

Evaluation of the Residual Plastic Deformation in Low-Carbon Steel with the Oscillatory Rotating Eddy Current Method

Overview of Researches on the Nondestructive Testing Method of Metal Magnetic Memory: Status and Challenges

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