Investigations were carried out on three-body abrasive wear behaviour on six aluminium alloys (AA1050, AA2014-T6, AA3003, AA5052, AA6061-T6 and AA6351-T6). Evaluation and comparison of the abrasion resistance of the aluminium alloys were carried out using silica sand of size 150-250 µm by dry sand rubber wheel (DSRW) test rig at room temperature. The tests were performed at constant rubber wheel sliding velocity ( V = 2.4 m/s) at different loads (5-20 N). Abrasion studies reveal that abrasive wear increases with increase in load. The wear volume was found to be in linear relationship with sliding distance and the steady state behaviour of the materials was attained around a sliding distance of 5760 m. Correlation of abrasive wear rate with hardness, ultimate strength and percentage elongation at break are reported. Wear mechanisms involved in material removal process were studied with the aid of optical microscope and scanning electron microscope (SEM).
Solid particle erosion behaviour of ferritic stainless steels AISI 444 and 439, austenitic stainless steel AISI 304 and low carbon steel AISI 1010 were investigated. Erosion studies of these materials were conducted at room temperature using silica sand of size 150-300 mm. The influence of erosion rates due to different velocities (40-85 m/s) and impingement angle (15-90 ) were experimentally analysed. Erosion efficiency values (0.7-3.6%) indicate that erosion occurs by lip or platelet formation in the material. The present study reveals that the peak in the erosion rate for AISI 444, AISI 439 and AISI 304 occurs at about 30 impingement angle while that for AISI 1010 at about 45 impingement angle. Hutchings' normal erosion model was also examined. Scanning electron microscope studies were conducted to analyse the surface morphology of the tested samples under erosion condition. Variations in microstructure and micro hardness of the material due to solid particle erosion on the materials were also discussed.
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