MICROSTRUCTURE AND EUTECTIC MORPHOLOGY OF AL-12.5°/o Si ALLOY REFINED WITH ANTIMONY

Authors : Funda Kahraman, Mustafa Kulekçi

Pages : 10-14

Doi:10.16984/saufbed.05094

View : 28 | Download : 10

Publication Date : 2007-06-01

Article Type : Research Paper

Abstract :Modification of Al-Si cast alloys can be achieved in two different ways, namely by additions of certain eleınents or with rapid cooling rate. Modifications of the Al-Si al1oys are carried out extensivcly in industry to improve the mechanical properties, particularly ductility. In this study, the effects of antiınony addition.s and growth rate on the ınicrostructure and eutectic morphology on the directionally solidified Al- 1 2.5°/o Si cutectic all oy has been investigated. The results showed that antimony can be identified as a grain refıner. Over modification occurs in Al- 12.5 °/oSi alloy when modifier is present in the amount of 1 %Sb results in AISb compound.
Keywords : Al Si alloys, dendrite, flake, microstructure, modification