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: study of the influence of stress and microstructure”, Original Research Article Acta Materialia , vol. 46, no. 14, pp. 4873-4882, (1998). [4] D. C. Jiles, P. Garikepati and D. D. Palmer, “Evaluation of residual stress 300M steels using magnetization, Barkhausen effect and X-ray diffraction techniques”, NDT & E International , vol. 29, no. 5, p. 343, (1996). [5] M. Chmielewski, L. Piotrowski and B. Augustyniak, “A fast procedure of stress state evaluation magnetically anisotropic steels with the help of a probe with adjustable magnetizing field direction

REFERENCES 1. Senczyk D., Moryksiewicz S.: Residual stresses - concepts and classifications , Non-destructive Testing - Internet Service, 2007. 2. Paczkowska T., Paczkowski W., Wróblewski T.: The influence of ground settlement on the condition of skeleton steel structure , 23th Conference of Structural Failures, Szczecin-Międzyzdroje, May 23-26, 2007, 639–646. 3. Dyląg Z., Orłoś Z.: Analysis of the possibility of semi-multiphase trepanation in the case of uniaxial stress , Engineering Transactions 4/1960, 845-869. 4. Kowalski D.: Application of Barkhausen

Diagnostic Examination of P265GH Boiler Steel Plate Using the Barkhausen Method

The article presents the results of diagnostic examination of P265GH boiler steel plate. During blanking, cutting and cold forming of elements from this plate, their spontaneous plastic deformation and warping took place, indicating an unfavourable internal stress state of a considerable magnitude occurring in the steel plate. In order to identify the causes of this situation, examinations were carried out, which included a microstructure assessment and a Vickers hardness test. In view of the absence of clear differentiation, in terms of both structure and hardness, in different steel plate areas, diagnostic examination was performed by the Barkhausen magnetic method, which included the determination of the principal direction of residual stresses and the determination of their anisotropy based on the measurement of the effective value of Barkhausen noise. As their result, a significant anisotropy of residual stresses was revealed on the steel plate surface. Moreover, the adverse phenomenon of perpendicularity of the principal directions of stresses was found to occur on the opposite plate surfaces, being the direct cause of warping of elements cut out from the plate

R eferences [1] S. Chikazumi, Physics of Ferromagnetism Second Edition, Clarendon Press, Oxford, 1997. [2] F. Herlach and N. Miura, “High Magnetic Fields, Science and Technology vol. 1-3, World Scientific, pp. 2003-2006. [3] H. Knoepfel, Pulsed High Magnetic Fields , North-Holland Publishing Co., 1970. [4] Y. Nakahata et al , “Study of sensor structure for magnetization characteristics measurement high pulsed fields”, J. Jpn. Soc. App. Elec. Mach. , vol. 19, no. 2, pp. 207-212, (2011). [5] K. I, Yamada et al , “Observation of Barkhausen effect

. Aless,ro and C. Beatrice and G. Bertotti and A. Montorsi, “Domain?wall dynamics and Barkhausen effect metallic ferromagnetic materials. I. Theory”, Journal of Applied Physics , vol. 68, pp. 2901-2907, (1990).

-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

Circuits for Barkhausen Noise Measurements”, Measurement Science and Technology vol. 18, no. 11, 2007, pp. 3501–3510. [10] B. Alessandro and C. Beatrice and G. Bertotti and A. Montorsi, “Domain-wall Dynamics and Barkhausen Effect in Metallic Ferromagnetic Materials. I. Theory”, Journal of Applied Physics vol. 68, no. 6, 1990, pp. 2901–2907. [11] J. Pal’a and M.Šoka, “Investigation of Two-Stage Magnetic Barkhausen Noise Measurement Method at Power Line Frequency”, Acta Physica Polonica A vol. 129, no. 3, 2016, pp. 383–387. [12] J. Pal’a and J. Bydžovský, “An