Feeding and Distribution of Porosity in Cast Al-Si Alloys as Function of Alloy Composition and Modification

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Standard

Feeding and Distribution of Porosity in Cast Al-Si Alloys as Function of Alloy Composition and Modification. / Tiedje, Niels Skat; Taylor, John A.; Easton, Mark A.

In: Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science, Vol. 43, No. 12, 2012, p. 4846-4858.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Harvard

APA

CBE

MLA

Vancouver

Author

Tiedje, Niels Skat; Taylor, John A.; Easton, Mark A. / Feeding and Distribution of Porosity in Cast Al-Si Alloys as Function of Alloy Composition and Modification.

In: Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science, Vol. 43, No. 12, 2012, p. 4846-4858.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Bibtex

@article{a7f9acb16ade45e6bb17696cbdee3a4d,
title = "Feeding and Distribution of Porosity in Cast Al-Si Alloys as Function of Alloy Composition and Modification",
publisher = "Springer New York LLC",
author = "Tiedje, {Niels Skat} and Taylor, {John A.} and Easton, {Mark A.}",
note = "© The Minerals, Metals & Materials Society and ASM International 2012",
year = "2012",
doi = "10.1007/s11661-012-1308-0",
volume = "43",
number = "12",
pages = "4846--4858",
journal = "Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science",
issn = "1073-5623",

}

RIS

TY - JOUR

T1 - Feeding and Distribution of Porosity in Cast Al-Si Alloys as Function of Alloy Composition and Modification

A1 - Tiedje,Niels Skat

A1 - Taylor,John A.

A1 - Easton,Mark A.

AU - Tiedje,Niels Skat

AU - Taylor,John A.

AU - Easton,Mark A.

PB - Springer New York LLC

PY - 2012

Y1 - 2012

N2 - Unmodified, Na-modified, and Sr-modified castings of Al-7 pct Si and Al-12.5 pct Si alloys were cast in molds in which it was possible to create different cooling conditions. It is shown how solidification influences the distribution of porosity at the surface and the center of the castings as a function of modification and Si content in sand- and chill-cast samples. Eutectic modification, Si content, and cooling conditions have a great impact on the distribution of porosity. Unmodified and Na-modified castings are more easily fed with porosity tending to congregate near the centerline of the casting, while Sr-modified castings solidify in a mushy manner that creates a more homogeneous distribution of porosity in the casting. The amount of porosity was highest in the Sr-modified alloys, lower in the Na-modified alloys, and lowest in the unmodified alloys. The size of the porosity-free layer and the effectiveness of the feeders were greater in the castings made with the steel chills due to the increased thermal gradients and consequent increase in the directionality of solidification.

AB - Unmodified, Na-modified, and Sr-modified castings of Al-7 pct Si and Al-12.5 pct Si alloys were cast in molds in which it was possible to create different cooling conditions. It is shown how solidification influences the distribution of porosity at the surface and the center of the castings as a function of modification and Si content in sand- and chill-cast samples. Eutectic modification, Si content, and cooling conditions have a great impact on the distribution of porosity. Unmodified and Na-modified castings are more easily fed with porosity tending to congregate near the centerline of the casting, while Sr-modified castings solidify in a mushy manner that creates a more homogeneous distribution of porosity in the casting. The amount of porosity was highest in the Sr-modified alloys, lower in the Na-modified alloys, and lowest in the unmodified alloys. The size of the porosity-free layer and the effectiveness of the feeders were greater in the castings made with the steel chills due to the increased thermal gradients and consequent increase in the directionality of solidification.

UR - http://www.springerlink.com/content/120437/

U2 - 10.1007/s11661-012-1308-0

DO - 10.1007/s11661-012-1308-0

JO - Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science

JF - Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science

SN - 1073-5623

IS - 12

VL - 43

SP - 4846

EP - 4858

ER -