Influence of calcium on the microstructure and properties of an Al-7Si-0.3Mg-xFe alloy

Kumari, SSS, Pillai, RM, Nogita, K, Dahle, AK and Pai, BC (2006) Influence of calcium on the microstructure and properties of an Al-7Si-0.3Mg-xFe alloy. Metallurgical And Materials Transactions A-Physical Metallurgy And Materials Science, 37A 8: 2581-2587. doi:10.1007/BF02586230


Author Kumari, SSS
Pillai, RM
Nogita, K
Dahle, AK
Pai, BC
Title Influence of calcium on the microstructure and properties of an Al-7Si-0.3Mg-xFe alloy
Journal name Metallurgical And Materials Transactions A-Physical Metallurgy And Materials Science   Check publisher's open access policy
ISSN 1073-5623
Publication date 2006-01-01
Sub-type Article (original research)
DOI 10.1007/BF02586230
Open Access Status DOI
Volume 37A
Issue 8
Start page 2581
End page 2587
Total pages 7
Place of publication Warrendale
Publisher Minerals Metals Materials Soc
Language eng
Subject C1
671004 Castings
291400 Materials Engineering
Abstract The effect of Ca addition on the microstructure, physical characteristics (density/porosity), and mechanical properties (tensile and impact strength) has been investigated in an Al-7Si-0.3Mg-xFe (x = 0.2, 0.4, and 0.7) alloy. The size of Al-Fe intermetallic platelets (beta-Al5FeSi) increased with increasing Fe content. The addition of Ca modified the eutectic microstructure and also reduced the size of intermetallic Fe-platelets, causing improved elongation and impact strengths. A low level of Ca addition (39 ppm) reduced the porosity of the alloys. The tensile strength was decreased marginally with Ca addition. However, Ca addition improved the ductility of the alloy by 18.3, 16.7, and 44 pet and the impact strength by 44, 48, and 15.8 pct for Fe contents of 0.2, 0.4, and 0.7 pct, respectively.
Keyword Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Al-si Alloys
Casting Alloy
Fe
Intermetallics
Solidification
Phases
Porosity
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 18:50:14 EST