Tribological and corrosion properties of AM70 magnesium alloy processed by equal channel angular pressing
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Date
2017
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Publisher
Cambridge University Press
Abstract
Wear and corrosion properties of AM70 magnesium alloy subjected to equal channel angular pressing (ECAP) were investigated using pin-on-disc dry sliding wear test and electrochemical impedance spectroscopy (EIS), respectively. Wear test was conducted with 30 and 40 N loads with sliding distance of 5000 m and at a constant speed of 3 m/s. Reduced coefficient of friction (COF) and wear mass loss of ECAP processed samples showed increased wear resistance. Worn surface analysis by scanning electron microscope (SEM) showed the presence of delamination, wear debris, and plowing. Energy dispersive X-ray spectrometer (EDS) revealed the occurrence of oxidation, and the wear mechanism was identified as abrasion and oxidation wear. EIS plots showed the improvement in corrosion resistance of ECAP processed magnesium alloy compared to initial condition due to grain refinement and homogeneous distribution of secondary particles. © Materials Research Society 2017.
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Keywords
Corrosion, Corrosion resistance, Electrochemical corrosion, Electrochemical impedance spectroscopy, Friction, Grain refinement, Grain size and shape, Magnesium, Magnesium alloys, Pressing (forming), Scanning electron microscopy, Spectrometers, Spectroscopy, Surface analysis, Tribology, Wear resistance, X ray diffraction, X ray spectrometers, Coefficient of frictions, Corrosion property, Dry sliding wear test, Energy dispersive x-ray spectrometers, Homogeneous distribution, Initial conditions, Secondary particles, Sliding distances, Equal channel angular pressing
Citation
Journal of Materials Research, 2017, 32, 11, pp. 2153-2160