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 pile-up 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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