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
(a)
(b)
Figure 2. SEM of Al- 2Fe-1V-1Si alloys at a cooling rate of 30 K/s (a) unmodified, and (b) modified with 1% of
Ni-20Mg alloy.
Table 2: Mechanical properties of as cast alloys:
Alloy Hardness (VHN) UTS (MPa) % elongation
Al-2Fe-1Si-1V 46 80.91 5
Al-2Fe-1Si-1V 61.25 127.20 5
Table 2 show the Hardness, Ultimate tensile strength (UTS) and percentage elongation as cast samples. From the
table, it is clear that the mechanical properties improved considerably after modification with Ni-Mg master
alloy. The tensile strength of the 1% of Ni-20Mg modified Al-2Fe-1V-1Si alloy is 127.20 MPa with elongation
5%. Modification of the alloy results in reduction in microporosity and refinement of size and morphology of the
particles. The refinement of the particles produces dispersion strengthening effect.
4. Conclusions
1. During solidification of a quaternary Al-2Fe-V-Si alloy, different phases are formed at different temperatures.
2. The morphology, size and distribution of the primary as well as interdendritic phases are considerably
modified with Ni-Mg treatment of the molten alloy.
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