About this Engineering article
Formation of novel microstructures in conventionally cast Al–Fe–V–Si alloys by K.L. Sahoo; S.K. Das; B.S. Murty is a Engineering article available to read on EtoBox.
The present paper reports the formation of novel morphologies of intermetallic compounds during the solidification of different Al Á/Fe Á/V Á/Si alloys using cooling rates ranging from 1 to 20 K s (1 . The influence of cooling rate, composition of the alloy and the addition of Mg and Ni Á/20%Mg alloy on the morphology of the intermetallic phases, particularly that of Al 13 Fe 4 phase, is reported. Al 13 Fe 4 forms with a ten-armed star shaped morphology with small amount of Si ( B/1 wt.%) at a cooling rate of :/14 K s (1 . A lower cooling rate and higher Si content result in degeneration of the ten-armed stars into other morphologies. The higher the Si content, the higher the cooling rate required to form the ten-armed star-shaped Al 13 Fe 4 phase. Ten-fold growth morphology of the precipitates is formed due to twinning along (2 0 1) or (1 0 0) planes. The morphology, size and distribution of those precipitates can be considerably modified by Mg treatment. Treatment of an Al Á/8.3Fe Á/0.8V Á/0.9Si alloy melt with 1.5 wt.% of Mg or 1 wt.% of a Ni Á/20Mg alloy alters the ten-armed growth morphology to rectangular, hexagonal or other compact forms.
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- K.L. Sahoo; S.K. Das; B.S. Murty
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 0921-5093)
- Published
- 2003
- Language
- EN
- Field
- Engineering (Physical Sciences)