Abstract
The tribocorrosion behaviour of equal channel angular pressed (ECAP) 316L austenitic stainless steel was studied. ECAP process had resulted in significant grain reduction from 38 ± 9 μm to 3 ± 1 μm after the 4th pass. Grain refinement had improved hardness up to ∼141% and enhanced the strength by at least ∼64% in the 4th pass sample. The 4th pass sample shows minimum wear volume loss and a low coefficient of friction during the tribocorrosion due to refined grains that show high resistance to plastic deformation. The open circuit potential (OCP) curve of ECAP-processed samples shifts to a more negative potential (∼0.39 V) than the solutionized (∼0.35 V) one. Due to the high wear resistance or less wear depth of ECAP processed samples, a minimal shift was observed. The surface morphology of the wear track confirms that abrasive wear prevails in all the samples.
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