Abstract
This work studied the effects of load and sliding rate on the wear behavior under dry sliding contact of a Ti-containing high-Mn austenitic Fe-21Mn-1.2Si-1.6Al-0.45C TWIP steel. The wear behavior was investigated using a pin-on-ring configuration. For this purpose, as-solution heat-treated samples were worn at different loads (53, 104, 154 N) and sliding rates (0.22, 0.60, 0.87 m/s). TWIP steels in as-solution condition were characterized by optical microscopy (LOM), x-ray diffraction (XRD) and tensile and Vickers hardness test. Likewise, wear debris and worn surfaces were characterized by scanning electron microscopy (SEM), energy-dispersive spectroscopy (SEM-EDS) and XRD. In addition, worn surfaces were nickel-plated autocatalytically in order to protect the oxide and deformed surface layers generated under wear test conditions. In general, wear resistance of the studied TWIP steels increases at high sliding rate, Ti addition to TWIP steel moderately improves the wear behavior and the main wear mechanism is oxidative.
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