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Vol.11 No.3previousAA SP21 (AA163-164) NT95

Academic Articles
Regular Paper Vol. 11 No. 3 (2019) p.118 - p.123

Investigating the performances of parameters of magnetic hysteretic loop on characterizing the residual plastic strain in low carbon steel


Xiaodong ZHANG1, Bin WU1, Xiucheng LIU1,* and Cunfu HE1

1 College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China

The residual plastic strain in ferromagnetic structural components will affect the structural integrity, the mechanical properties of materials and even the service life. Therefore, accurately characterizing the degree of residual plastic strain is important to predict the service life time of components. The plastic deformation changes the dislocation density and the magnetic hysteretic properties of ferromagnetic materials. The variation in the shape of magnetic hysteresis curves will be suitable indicators for nondestructive evaluation of the residual plastic deformation in ferromagnetic steels. The core issue is to find stable magnetic parameters a that are sensitive to the changes of the residual plastic strain. In this study, the performances of the magnetic parameters (including coercive force Hc, maximum magnetic flux density Bmax, hysteresis loss WL and the harmonic amplitudes of magnetic flux density b1, b3) to the residual plastic strain in low carbon steel were investigated by experiments. Especially, the influences of excitation frequency on the performances of magnetic parameters in characterizing the residual plastic strain were analyzed. The results show that both the parameters of Bmax and b1 demonstrate linear dependency on the residual plastic strain εp even the frequency of the applied magnetic field changes. Therefore, the parameters of Bmax and b1 are preferred parameters to characterize the residual plastic strain in the tested low carbon steel.
Magnetic hysteretic loop, residual plastic strain, low carbon steel, magnetizing frequency
Full Paper: PDF EJAM Vol. 11 No. 3 pp.118-123 "Investigating the performances of parameters of magnetic hysteretic loop on characterizing the residual plastic strain in low carbon steels"
Article Information
Article history:
Received 24 October 2018
Accepted 24 October 2019