Search

In this paper, effect of secondary ageing process on the hardness and the abrasive wear resistance of AlSi10Mg casting alloys was studied. In the T6 temper heat treatment, AlSi10Mg alloy was aged at 170 °C for 4 hours. In secondary ageing process, AlSi10Mg alloy aged at 170 °C for 10 or 30 minutes was re-aged at 100 °C for 135 hours. Abrasive wear tests were performed on pin-on disk abrasive wear tester under 20 N and 30 N loads and 180 Mesh abrasive papers and at the sliding speed of 0.2 ms-1. Abrasive wear test results revealed that specimen aged at 170 °C for 30 minutes and then re-aged at 100 °C for 135 hours has the highest abrasive wear resistance. [ABSTRACT FROM AUTHOR]

In this study, effect of counter gravity casting method on the adhesive wear behaviors of AlSi alloy was investigated. The counter gravity casting and gravity casting specimens were produced by pouring at 600, 640 and 690 °C, with 100, 250 and 500 mmHg vacuum level in sand mould. These specimens were tested on the modified pin on disk adhesive wear tester. Adhesive wear tests were performed on the under normal loads of 20 and 60 N, and sliding speed of 1 m/s. Adhesive wear test results showed that the specimens have similar wear trend with hardness results under low load (20N), but when the load increased (60N), the specimen with highest hardness exhibited the worst adhesive wear resistance. [ABSTRACT FROM AUTHOR]

In this study, wear behavior of B4C particle reinforced Al matrix composites produced by powder metallurgy technique has been investigated under dry sliding conditions. Characterization of composites were determined by microscopic examinations, hardness measurements and abrasive wear tests. Abrasive wear tests were conducted with 180 and 400 Mesh Al2O3 paper under 10 N and 20 N load 0,2 m s-1 sliding speed. Hardness increased by addition of B4C particles. While 20 % B4C particles reinforced composites have shown the highest hardness values, 10 % B4C particles reinforced composites have shown ultimate wear resistance. [ABSTRACT FROM AUTHOR]