On the application of magnetoelastic properties measurements for plastic level determination in martensitic steels

Leszek Piotrowski 1 , Marek Chmielewski 1  and Zbigniew Kowalewski 2
  • 1 Gdansk University of Technology, , 80-233, Gdansk, Poland
  • 2 Institute of Fundamental Technological Research, Polish Academy of Sciences, 02-106, Warsaw, Poland


The change in the dislocation density, induced by plastic deformation, influences strongly the magnetic domain structure inside the material. Being so, classic parameters, like the coercivity or magnetic permeability, can be a good measure of the deformation level, yet their reliable determination in a non-destructive way in industrial environment is problematic. The magnetoacoustic emission (MAE) which results from the non-180° domain walls (DW) movement in materials with non-zero magnetostriction can be used as an alternative. The intensity of the MAE signal changes strongly as a result of plastic deformation for both tensile and compressive deformation. It is however possible to discern those cases by analysing the changes in the shape of the MAE signal envelopes. The set of the martensitic steel samples (P91) deformed up to 10% (for both tension and compression) was investigated. Due to geometrical limitations imposed by the special mounting system, enabling compression without buckling, the sample had the shape resulting in low signal to noise (S/N) ratio. Being so the optimization of FFT filtering and wavelet analysis was performed in order to improve sensitivity of the proposed method of deformation level determination.

If the inline PDF is not rendering correctly, you can download the PDF file here.

  • [1] H. Mughrabi, “Deformation-induced long-range internal stresses and lattice plane misorientations and the role of geometrically necessary dislocations”, Philos.Mag.86, pp. 40374054, (2006).

  • [2] L. Piotrowski, B. Augustyniak, M. Chmielewski and Z. L. Kowalewski, “Multiparameter analysis of the Barkhausen noise signal and its application for the assessment of plastic deformation level 13HMF grade steel”, Meas.Sci.Technol. 21 115702, (7pp), 2010).

  • [3] L. Dietrich, G. Socha and Z. L. Kowalewski, Anti-buckling fixture for large deformation tension-compression cycling loading of thin metal sheets; Strain 50 (2013), pp. 174-183.

  • [4] L. Piotrowski, M.Chmielewski and Z. L. Kowalewski, “The Dominant Influence of Plastic Deformation Induced Residual Stress on the Barkhausen Effect Signal Martensitic Steels”, J.Nondestruct.Eval. 36:10 (2017).

  • [5] L. Piotrowski, B. Augustyniak and M. Chmielewski, “On the possibility of application of the magnetoacoustic emission intensity measurements for the diagnosis of thick-walled objects the industrial environment”, Meas.Sci.Technol. 21 035702 (8pp), (2010),.

  • [6] D. B. Percival and, A.T. Walden, Wavelet Methods for Time Series Analysis, Cambridge Series Statistical and Probabilistic Mathematics, Cambridge University Press, (2000).

  • [7] D. F. Walnut, “ “ An Introduction to Wavelet Analysis Boston, MA: Birkhuser (2004).


Journal + Issues