ISSN: 1304-7191 | E-ISSN: 1304-7205
Wear behavior of az91d magnesium composite
1Yıldız Technical University, Department of Metallurgical and Materials Engineering, Esenler-ISTANBUL
Sigma J Eng Nat Sci 2015; 33(3): 465-471
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AZ91D alloy was produced using the conventional casting methods in a local foundry. Then, SiC ceramic additive materials (particulates) with 2%, 4% and 8% by weight (average grain size of 7 μm and 32 μm) were mixed with AZ91 alloy by stir-casting method. The properties of the AZ91 alloy and AZ91/SiC composite materials produced were determined by means of hardness and wear tests, and microstructural characterization was conducted by optical microscopy, scanning electron microscopy and x-ray diffraction. It was observed that the improvement in hardness for the composite with a diameter of 7 μm diameter is higher than the composite with a diameter of 32 μm. Wear testing was conducted through the ball-on-disc method at a rate of 10 cm.s-1 under a load of 5 N. The friction coefficient was found to be between the 0.115-0.172 intervals, and no wear was observed on the alumina (Al2O3) ball material.