Influence of calcium on the microstructure and properties of an Al-7Si-O.3Mg-xFe Alloy

S. S. Sreeja Kumari; R. M. Pillai; K. Nogita; A. K. Dahle; B. C. Pai

doi:10.1007/BF02586230

Influence of calcium on the microstructure and properties of an Al-7Si-O.3Mg-xFe Alloy

S. S. Sreeja Kumari, R. M. Pillai, K. Nogita, A. K. Dahle, B. C. Pai

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

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 (β-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 pct and the impact strength by 44, 48, and 15.8 pct for Fe contents of 0.2, 0.4, and 0.7 pct, respectively.

Original language	English
Pages (from-to)	2581-2587
Number of pages	7
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	37
Issue number	8
DOIs	https://doi.org/10.1007/BF02586230
Publication status	Published - Aug 2006
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys

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10.1007/BF02586230

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title = "Influence of calcium on the microstructure and properties of an Al-7Si-O.3Mg-xFe Alloy",

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 (β-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 pct and the impact strength by 44, 48, and 15.8 pct for Fe contents of 0.2, 0.4, and 0.7 pct, respectively.",

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AU - Sreeja Kumari, S. S.

AU - Pillai, R. M.

AU - Nogita, K.

AU - Dahle, A. K.

AU - Pai, B. C.

PY - 2006/8

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AB - 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 (β-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 pct and the impact strength by 44, 48, and 15.8 pct for Fe contents of 0.2, 0.4, and 0.7 pct, respectively.

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Influence of calcium on the microstructure and properties of an Al-7Si-O.3Mg-xFe Alloy

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