Barkhausen Noise Stress Characteristic of P265GH Boiler Steel |
| T. Garstka
Czestochowa University of Technology, Faculty of Materials Processing Technology and Applied Physics, al. Armii Krajowej 19, 42-200 Częstochowa |
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| In this paper characterization of internal mechanical stress state in boiler steel plate by the Barkhausen effect based method was presented. The affecting of calibration functions shape by tensile and compressive residual stress was observed. Beside of the significant residual stress anisotropy in sub-surface layers, unfavorable location of main directions of stress was revealed on both sides of the plate. The new method of calibration function without heat treatment of calibration specimens was elaborated and presented also. The investigations of Barkhausen noise as function of applied stress for different intensity and frequency of magnetization current were performed. Based on this, optimal magnetization conditions of doing measurement were estimated. Own construction of measuring apparatus for experiments was used. |
| DOI: 10.12693/APhysPolA.121.954 PACS numbers: 75.60.Ej |