![]() ![]() ![]() Wear resistance of alumina ball also followed the same trend as for 13Cr MSS. Wear resistance for tempered condition is measured to be lower than that for austenitized condition with least wear resistance for 550 ☌ tempered condition. Austenitized and 300 ☌ tempered condition exhibited stable COF variation with time whereas fluctuating and increasing COF with time was observed in 550 ☌ & 700 ☌ tempered conditions, respectively. The results showed that the coefficient of friction (COF), wear rate and wear mechanism changed significantly with tempering temperature. ![]() Complementary analytical techniques such as 3D-optical profilometry, optical, scanning electron microscopy/energy dispersive spectroscopy and microhardness measurements have been utilized to elucidate the operating wear mechanism. ![]() A ball-on-plate configuration having alumina ball as counterface was employed for dry sliding experiments. This present study seeks to understand tribological properties of 13Cr martensitic stainless steel (MSS) in austenitized and tempered conditions (300, 550 and 700 ☌). Also, more plate-like wear particles were observed on the disks of tempered martensite due to greater surface and subsurface crack fomation and propagation. More voids and cracks was developed in the near surface region of tempered martensite leading to accelerated material loss through smearing and delamina-tion. As the tempering temperature increases, more cracks were observed for all quenched-tempered disk specimens. The greater amount of wear debris in the quench-tempered samples led to more severe contact stresses between the ball and disk samples which accelerated the smearing of material. The quenched-tempered disk specimens generated more debris than the austempered specimens. The wear loss of the disk specimens was due to smearing plastic deformation resulting in material pileup along the wear track and debris inside the wear track. The results showed that the disk surfaces were hardened after tribo-tests due to fresh-martensite formation caused by frictional heating/self-quenching during the sliding tests. Worn surfaces were analyzed by micro-hardness, 3D profilometer, microscopy and scanning electron microscope (SEM). This research presents an experimental study on the tribological behavior and plastic deformation layer response of quenched-tempered AISI 6150 steel and austempered AISI 6150 steel under sliding with a ball-on-disk type apparatus. ![]()
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