Effect of sliding speed and rise in temperature at the contact interface on coefficient of friction during full sliding of SS304

Abstract

Most of the marine, aerospace, mechanical, civil components undergo cyclic loading. When two metal bodies slide or move relative to one another, there will be a mechanical energy loss as a result of friction. In the majority of dry sliding scenarios, it is appropriate to assume that all frictional energy is transferred as heat to the contacting bodies. Frictional heating is what causes the temperature of the sliding bodies to rise, particularly at the contact interface. The temperature on the contact interface may be high enough to have a substantial influence on the outcomes of the sliding mechanism. The following are some of the potential effects of high sliding surface temperatures: surface melting, oxidation, oxidation wear, deterioration of solid, thermo elastic instabilities, and thermo cracking of the sliding components. When two metals are in contact and subjected to friction, heat is generated at the contact interface which plays a vital role in the field of tribology. Pin-on-disk apparatus is used to examine materials sliding. The current research work focuses on the effect of sliding speeds, normal loads, and temperature rise at the contact interface of SS304 alloys subjected to full sliding experiments. Dry sliding experiments were conducted on Rotary Type Pin-on-Disk Tribometer and Finite Element Modelling was carried out using ANSYS Software. Cylindrical pins of radius 3 mm, height 30 mm, and circular disk of diameter 165 mm having flat surface were fabricated to simulate Hertzian contact configuration. Experiments were conducted at three different sliding speeds of 1 m/s, 2 m/s, and 3 m/s under normal load of 1 kg, 1.5 kg and 2 kg and two different wear tracks of diameter (60 mm and 120 mm) respectively. Dry sliding experiments were conducted up to time of 200 s. The rise in temperature were measured using K-type thermocouples and they were located to the pins at 4 mm and 7 mm distance from the contact interface. The temperature and heat flux at the contact surface was predicted using inverse heat transfer method obtained during Pin on Disk experiment. Evolution of pin temperature at the contact interface obtained from Finite Element Analysis results is in good agreement with the experimental result.