OCTOBER 19-20, 2012 - YMCA University of Science & Technology

Proceedings of the National Conference on
Trends and Advances in Mechanical Engineering,
YMCA University of Science & Technology, Faridabad, Haryana, Oct 19-20, 2012
14 R z
12
Surface Roughness (µm)
10
8
6
4
2
R a
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
Depth of Cut (mm)
Figure 1(b) Effect of depth of cut on surface roughness height for f = 0.5mm/rev
and v = 75m/min of Al-2Fe-1Si alloy
9. Discussion
In present work the hardness and tensile strength of alloys increases as iron content increases and ductility
decreases as % of iron increases. As per appearance of chip formation it may be conclude that machinability is
poor as depth of cut increases.
From the Figure 1(a) and (b), it can be observed that depth of cut and surface finish is not following the trend in
increasing order but it is abruptly changing alternately and it goes up. Initially at 0.25mm depth of cut, the
surface roughness is low, at 0.50 mm depth of cut there is good surface finish and again as depth of cut increases
alternately the quality of surface finish also changing.
10. Conclusion
The surface finish is poor as Fe content increases from 1% to 2% in alloy but increasing the Fe content reduces
the variation in surface roughness [Figure 1(b)]. The surface roughness of the workpiece was affected by depth
of cut. Decrease in feed and an increase in cutting speed improve the surface finish. High speed and low depth of
cut are recommended for better surface finish.
References
[1] Metal Handbook, (1990). 10th Edition, ASM international, the materials information society, Vol.2.
[2] B.N.Pathak, Arvind Kumar, K.L.Sahoo and P.Talukdar, (2006). Mater. Sci. Eng. A 433, 310-315.
[3] K.L.Sahoo, C.S.Sivaramakrishnan and A.K.Chakrabarti, (2000). Met and Mater. Trans A, Vol.31, 1599-
1610.
[4] R. Noorani, Y. Farooque, T. Ioi,(2009). Improving Surface Roughness of CNC Milling Machined Aluminum
Samples Due to Process Parameter Variation. International Network for Engineering Education and Research,
ICEE_iCEER- international conference.
[5] John A. Taylor, (2004). The Effect of Iron in Al-Si Casting Alloys. Australian Foundry Institute (AFI) , 35th
Australian Foundry Institute National Conference, page 148-157.
[6] D K Dwivedi,(2002). Indian Foundry Journal, Vol.-48, No.1, pp-32-38.
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