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Abstract
This study investigates dry sliding wear behavior of as-cast AZ31B magnesium alloy using a pin-on-disc type wear apparatus against EN42 steel with heat treatment as counterface. A wear mapping approach has been undertaken to represent the wear regimes and the main mechanism of wear in each regime. Wear resistance of as-cast AZ31B magnesium alloy was tested using pin-on disc method with heat-treated high-carbon steel discs as counterface on dry-sliding conditions. Wear tests at a fixed sliding distance of 2500 m were performed in sliding velocities of 0.25, 0.5, 1 and 2 m/s, loads of 10, 20, 40 and 80 N. Microstructural examinations of worn surfaces of pins were characterized using SEM/EDS. Wear mechanism map of investigated material was drawn. The main wear mechanisms in each test conditions were identified and classified using the wear mechanism map. Three wear regimes, namely mild wear, severe wear, and ultra-severe wear were defined, based on the results. Consequently, ultra-severe plastic deformation is the main wear mechanism at the highest applied load and sliding velocity speed.DOI: http://dx.doi.org/10.5755/j01.mech.23.5.15761
Highlights
The specific strength of magnesium alloys provides engineers with an opportunity to change the traditional materials such as steel, cast iron or aluminium used in the transportation industry with these light-weight substitutes [1]
The microstructure of as-cast AZ31B magnesium alloy was observed by Scanning Electron Microscopy (SEM) (Fig. 1)
The results are in broad agreement with the previous investigations [4, 15, 16], which reported that wear rates increased with an increase in the applied load and sliding velocity
Summary
The specific strength of magnesium alloys provides engineers with an opportunity to change the traditional materials such as steel, cast iron or aluminium used in the transportation industry with these light-weight substitutes [1]. An et al [13] studied the friction and wear properties of ascast Mg-1Zn-2Y and Mg-9Al-1Zn magnesium alloys under dry sliding conditions using pin-on disc configuration. Taltavull et al [17] studied the wear behaviour of AM60B magnesium alloy under dry sliding conditions using pin-on disc type test apparatus. They revealed that the wear rate increases with increasing in applied load and sliding velocity. This study investigates dry sliding wear behaviour of as-cast AZ31B magnesium alloy using a pin-on-disc type wear apparatus against an EN42 steel with heat treatment as counter face. A wear mapping approach has been undertaken to represent the wear regimes and the main mechanism of wear in each regime
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