Evaluation of the wear mechanism of ferromagnetic materials based on magnetic barkhausen noise

ABSTRACT

As a typical form of damage, wear greatly affects the service properties of products, and non-destructive evaluation of the degree of wear is urgently needed. In this paper, the wear degree of AISI 1045 steel was evaluated by magnetic Barkhausen noise (MBN) testing. The root mean square (RMS) and full width at half maximum (FWHM) of MBN were extracted to establish the quantitative relationships between the tribological indicators and the stress state. The results indicate that the RMS decreases linearly and the FWHM increases quadratically with increasing tribological indicators, which can distinguish among different wear stages, including abrasive, adhesive and fatigue wear. However, the RMS shows a complicated nonlinear relation with the residual stress during the wear process. In addition, the MBN_energy parameter is also calculated to reveal the features of the hysteresis loop at the wear scar. Both the coercivity H_c and the maximum magnetic permeability μ_max are linearly related to the tribological indicators and quadratically related to the stress, which reflects the effect of tribo-magnetisation on the MBN signals. The variation mechanism of MBN under different wear stages is attributed to the combined effect of plastic deformation and the stress state by microstructure observations.

KEYWORDS:

• Magnetic barkhausen noise
• friction and wear
• tribological indicators
• stress
• microstructure

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The work was supported by the National Natural Science Foundation of China [52005246]; College Student Innovation and Entrepreneurship Training Program of Jiangsu Province [202311276024Z]; Jiangsu Mechanical Engineering Society for Youth Science and Technology Talent Support Program; Graduate Student Practice Innovation Plan of Jiangsu Province [SJCX22_1051, SJCX23_1177]; China Higher Education Scientific Research Planning Key Project [23CJRH0303]; Jiangsu Province Education Science ‘14th Five-Year’ Plan Key Program (C-b/2021/01/23).