Influence of Semi-Solid Casting and Equal Channel Pressing on Microstructure of a Hypoeutectic Al-Si Alloy

Van Thuong Nguyen; Zuhailawati Hussain; Abu Seman Anasyida; Tr.D. Huy; Indra Putra Almanar

doi:10.4028/www.scientific.net/MSF.819.9

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HomeMaterials Science ForumMaterials Science Forum Vol. 819Influence of Semi-Solid Casting and Equal Channel...

Influence of Semi-Solid Casting and Equal Channel Pressing on Microstructure of a Hypoeutectic Al-Si Alloy

Abstract:

The aim of this work was to develop understanding of microstructural evolution of the alloy casted in semi-solid condition using a cooling slope and conventional casting followed by ECAP in a 120^o die. Feed materials were prepared by cooling slope casting and conventional casting for ECAP process. The microstructures and Vickers hardness of the worked materials extruded by two routes (A and B_C) were evaluated. The primary α-Al phase tends to be elongated after processing by route A. However, its morphology was similar in nature to the microstructure of the as-cast sample after processing by route B_C. The Si particles become fragmented during ECAP processing and are more nearly globular in shape and uniform in size than in the as-cast sample. The microstructure of the semi-solid cast ECAPed samples was more homogenous than that of the conventional cast ECAPed sample followed by ECAP for both routes. The hardness of semi-solid cast ECAP samples was also higher than that of conventional cast ECAPed samples for both routes.

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Periodical:

Materials Science Forum (Volume 819)

Pages:

9-14

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.819.9

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Online since:

June 2015

Authors:

Van Thuong Nguyen, Zuhailawati Hussain*, Abu Seman Anasyida, Tr.D. Huy, Indra Putra Almanar

Keywords:

Aluminium Alloy, Cooling Slope, Equal Channel Pressing, Globular Microstructure

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