The Effect of Mg Addition on the Wear Resistance of AlSi12 Alloy
Engin ÇEVİK S. Yasin Harun ÇUĞ D. Caliskan S. Gullu T. Cayir
AbstractIn this study, AlSi12 alloy and alloys produced by Mg addition at different ratios (%2 and 4%) were manufactured by pressurized casting method. Homogenization of 520 °C was applied to the produced alloys using electric resistance furnace. Wear behaviors were determined on the data obtained from experiments on the pin-on-disc type abrasion device. DIN 2379 quality cold work tool steel were used as a counter materials during the wear tests. Experiments were carried out at a shear rate of 0.5 m/s at a shear distance of 9000 m under two different loads (10-20 N). The test results were determined by measuring the weight loss of the samples. In order to determine the wear characteristics after the abrasion tests, the worn surfaces were examined with a SEM. The addition of Mg has resulted in significant improvement in abrasion resistance. It has been found that Mg2Si phases which may occur in the structure by Mg addition increase the abrasion resistance of the alloys. When the SEM photographs of the worn surfaces were examined, it is seen that the wear is in the form of groove formation and part plaster, which indicates that it is the adhesive wear characteristic.