Effects of Elastic-Plastic Deformation on Magnetic Barkhausen Noise Response in Steels
Aiming at the effects of elastic-plastic behaviors on the magnetic Barkhausen noise(MBN)sig-nals,having quasi-static uniaxial tensile tests based to comparatively investigate the correlations between stress-strain relationship and MBN emission in three typical carbon steels was implemented,including characterizing the material damage.The results show that,the carbon content has a great influence on the MBN signals.With the increasing of tensile stress,the MBN signals become significantly increased and reach a peak value and get saturated in the elastic region.In the plastic deformation region,the MBN sig-nals'change is flat but decline overall and the solid solution strengthening can further increase the resis-tance of the magnetic domain wall motion,and result in the MBN signals decreasing faster until breaks.After the stress unloading,the lowest MBN signal on the sample surface complies with the fracture position basically.
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