Al-Ti-C-Sr master alloy - A melt inoculant for simultaneous grain refinement and modification of hypoeutectic Al-Si alloys

Prasada Rao, A. K. ; Das, K. ; Murty, B. S. ; Chakraborty, M. (2009) Al-Ti-C-Sr master alloy - A melt inoculant for simultaneous grain refinement and modification of hypoeutectic Al-Si alloys Journal of Alloys and Compounds, 480 (2). L49-L51. ISSN 0925-8388

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.jallcom.2009.02.147

Abstract

Present article is focused on the microstructural features of Al-Ti-C-Sr master alloy, an inoculant for simultaneous grain refinement and modification of hypoeutectic Al-Si alloys. This master alloy is basically a metal matrix composite consisting of TiC and Al4Sr phases formed in situ in the Al-matrix. TiC particles initiate the refinement of primary α-Al through heterogeneous nucleation in molten hypoeutectic Al-Si alloy, while Al4Sr phase dissolves in molten Al-7Si alloy enriching the melt with Sr, which eventually leads to modification of eutectic silicon during solidification of the Al-7Si alloy casting. Thus present master alloy serves in both ways, as a grain refiner and a modifier for hypoeutectic Al-Si alloys.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Metals and Alloys; Intermetallics; Scanning Electron Microscopy (SEM); Microstructure; Metal Matrix Composites
ID Code:73900
Deposited On:08 Dec 2011 03:56
Last Modified:08 Dec 2011 03:58

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