Selected Results of the Assessment of the Straightening Process of Steel Sheets Using the Barkhausen Noise Method |
| T. Garstka, S. Mróz, P. Szota, A. Stefanik, J. Michalczyk
Czestochowa University of Technology, Faculty of Production Engineering and Materials Technology, Al. Armii Krajowej 19, 42-200 Częstochowa, Poland |
| Full Text PDF |
| The paper presents selected results of the assessment of straightening processes of steel sheets and plates in terms of monitoring changes in mechanical residual stresses. For the stress investigation, a method based on magnetic Barkhausen noise measurements was applied, and the custom measuring set-up was used. The study examined two different technological processes of leveling, based on tension for thin metal sheets and three-point overbending of thicker plates. The results are presented graphically in the form of directional diagrams of Barkhausen noise, as well as vectors representing orthogonal principal stresses in the cross-section plane. In general, an unfavorable stress state was observed on the opposite sides of the investigated sheets in the initial condition. The applied straightening operations resulted in a significant redistribution of residual stresses, in terms of both magnitude and sign. |
DOI:10.12693/APhysPolA.149.S155 topics: Barkhausen noise, residual stress, straightening process, steel sheet |