OPTIMIZATION OF WEAR RESISTANCE OF ALUMINUM MATRIX COMPOSITE (AL-7050/10WT% EGGSHELL) BY STUDY OF EFFECT STIRRING SPEED AND STIRRING TIME

Abstract

This study investigates the impact of stirring speed (X1) and stirring time (X2) composite materials (Al-7050/10 wt. %eggshell) renforcemented by eggshell particles of the on wear resistance by using the MINITAB 16 program. A composite material was produced by the stir casting method; the ingot was melted, and a molten metal vortex was produced by varying the stirring speed (200, 300, 400, 500, 600 rpm) and stirring duration (10, 20, 30, 40, and 50 minutes). Eggshell particles with a fixed weight fraction of (10% wt.) and sizes (21–30 μm) were used. It was concluded if the variables (X1 = 543.4343 rpm) and (X2 = 48.1818 min.) wear loss of (0.0061 g) could be achieved. In practice, wear loss (0.0063 g) was obtained using the values of X1 and X2, which were obtained using the programs. Was wear loss is almost identical to the value obtained by the program. Additionally, the results manifested that the stirring time (X2) and stirring speed (X1) have a significant impact on the wear loss, where increase in stirring speed and time leading to an increase in wear strength. Furthermore, the effect of stirring speed (X1) on the wear loss is larger than that of stirring time (X2).

Keywords

• stirring spee;
• stirring time
• wear resistance
• aluminum alloy
• egg shell
• composite materials
• stir casting