Effects of friction on tribo-magnetization mechanisms for self-mated iron pairs under dry friction condition

Abstract: The effects of friction on tribo-magnetization mechanisms for self-mated iron pairs under dry friction were experimentally investigated in this study. By comparing the effects of sliding speedsandnormal loadsonsurfacemagnetization, thephysical contradiction in frictional magnetization can therefore be classified. Results showed that severe friction phenomena are the prerequisite conditions for tribo-magnetization to occur.Themaximumdynamic saturated value of tribo-magnetization for the self-mated iron pairs during the friction process was found to be only about 18G but rapidly decreased to the range of 0–1G after the test. It was also found that tribo-magnetization decreased significantly with increasing sliding speed. This was due to a rise in surface temperature and the presence of oxide materials at the actual contact areas from higher sliding speeds. The magnetic domains were also randomly oriented due to thermal vibration,which explained surface demagnetizationwith increasing sliding speed. In general, the average tribo-magnetizationwas inversely proportional to the sliding speed.Under small normal loads, tribo-magnetizationwas insignificant. For normal loads exceeding 30N, the average tribo-magnetization increased linearly with increasing normal load. It was revealed that variations of the average tribo-magnetization coincided with wear losses under heavy normal loads. Th