Aluminium Lab Report

ABSTRACT Aluminium is a popular metal that is often used in our everyday life. Aluminium is taken as a base metal and silicon carbide is added as filler to enhance the consumer product appearance and its life time. While finishing the cast aluminium it leads to some dimensional error due to its surface roughness (finish). The surface roughness purely proportional to machining parameters (cutting speed, cutting feed, depth of cut). From the experimental value we have to conclude the optimum machining parameters. For the various machining parameters the mixture ratios are optimized. The powdered SiC with three different weight ratio (wt. %) in range of 5, 12.5, 25 grams are added to the base metal by casting process. The specimen is machined

& the fig. 6.

Table 1 Surface value for specimen 1

Weight of SiC in gms 5 12.5 25

Surface roughness in micrometer 0.95 0.9 1.46

Fig.6 Surface roughness foe specimen 1

Surface roughness for the specimen 2

The table 2 gives the value of surface roughness vale for the specimen 2. & the fig. 7 shows the graphical value of the surface roughness.

Table 2 Surface value for specimen 2

Weight of SiC in gms 5 12.5 25

Surface roughness in micrometer 0.92 0.84 0.88

Fig.7 Surface roughness foe specimen 2

Conclusion

From this various wt% incorporated Sic –aluminium composites 12.5 wt%. Sic incorporated specimen gives the better surface roughness value for both the specimen. Main objective of the work is to study the behavior of silicon carbide (SiC) on aluminium matrix in turning process for optimizing machining parameters in ordinary lathe.

Reference

[1] N. Tomac and K. Tonnessen, “(1992), “Machinability of particulate Aluminium Metal Matrix Composites”. Annals of the CIRP, Vol.41, 1992, pp. 55-58.

[2] Chang-Da Wen, Issam Mudawar , (2006) “Modeling the effects of surface roughness on the emissivity of aluminum alloys” Vol. 49,