Monitoring of Plastic Straining Degree of Components Made of Interstitial Free Steel after Uniaxial Tensile Test by the Use of Barkhausen Noise Technique

Abstract

The usability of the magnetic Barkhausen noise (MBN) technique for monitoring the critical state of plastic straining in the case of interstitial free (IF) steel is demonstrated. IF steels are frequently employed in the automotive industry (e.g., automotive body parts—doors, trunks, wheel arches, etc.), and rupture of components made of these steels occurs during cold forming. Alteration of microstructure expressed in many terms and the corresponding MBN features after the variable degree of plastic strains developed by the uniaxial tensile loading are investigated. It is reported that the effective value of MBN, as well as the shift of MBN envelopes toward higher magnetic fields, can be proposed as the suitable MBN features alerting the incoming matrix breakage. Moreover, the higher MBN in the direction of exerted load at the expense of the perpendicular direction can be found as a result of domain walls realignment.

Influence of domain walls thickness, density and alignment on Barkhausen noise emission in low alloyed steels

“…A previous article 13 described the investigation in-situ as well as post-situ of the MBN in LAS with a yield strength ( σ YS ) of 235 MPa as a function of plastic straining and reported a significant magnetic anisotropy as well as attenuation of the MBN as a result of increasing dislocation density. Also, Schmidova et al 14 reported a remarkable magnetic anisotropy in interstitial free (IF) steels beyond the plastic instability. Antonio et al 15 showed that the grain and the corresponding domain structure fragmentation affected the MBN after plastic deformation.…”

Non-Destructive Evaluation of Magnetic Anisotropy Associated with Crystallographic Texture of Interstitial Free Steels Using an Electromagnetic Sensor

“…These systems do not currently measure texture-related anisotropy as they have not been designed to measure the anisotropic magnetic signal. One also should not overlook the fact that some research has been carried out in the laboratory to characterise recovery and recrystallisation of IF steel using magnetic properties [11,[15][16][17]. However, these methods are not currently utilised to assess texture and do not take anisotropy into account.…”