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Effect of bismuth on microstructure of unmodified and Sr-modified Al-7Si-0.4Mg alloys

Farahany, S. and Ourdjini, Ali and Idris, Mohd. Hasbullah and Thai, L. T. (2011) Effect of bismuth on microstructure of unmodified and Sr-modified Al-7Si-0.4Mg alloys. Transactions of Nonferrous Metals Society of China (English Edition), 21 (7). pp. 1455-1464. ISSN 1003-6326

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Official URL: http://dx.doi.org/10.1016/S1003-6326(11)60881-9

Abstract

The effects of bismuth and the combination of bismuth and strontium on the eutectic silicon structure in Al-7Si-0.4Mg alloys were investigated under different solidification conditions. The results show that bismuth has a refining effect on the eutectic silicon and its refinement behavior increases with increasing Bi content up to 0.5 (mass fraction). When bismuth is added into the molten alloy modified with strontium, a higher Sr/Bi mass ratio of at least 0.45 is required to attain full modification of the eutectic silicon.

Item Type:Article
Uncontrolled Keywords:Al-Si alloy, bismuth, eutectic solidification, modification, strontium
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Mechanical Engineering
ID Code:28977
Deposited By: Liza Porijo
Deposited On:06 Dec 2012 08:58
Last Modified:06 Dec 2012 08:58

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