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The combined effect of Al-5Ti-1B and Al-10Sr on the metallurgical properties of LM6 Al-Si sand castings

Al-5Ti-1B is one of the prevalent grain refiners for Al-Si alloys in casting industry; on the other hand, Al-10Sr is one of the effective modifiers for Al-Si alloys. Grain refiners serve the purpose of refining the grain size of solidified castings while modifiers such as sodium and strontium are a...

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Main Authors: Lim, Y. P., Sulaiman, Shamsuddin, Hamouda, Abdel Magid Salem, Megat Ahmad, Megat Mohamad Hamdan
Format: Conference or Workshop Item
Language:English
Published: Universiti Putra Malaysia Press 2005
Online Access:http://psasir.upm.edu.my/id/eprint/33866/1/33866.pdf
http://psasir.upm.edu.my/id/eprint/33866/
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spelling my.upm.eprints.338662015-05-07T06:45:20Z http://psasir.upm.edu.my/id/eprint/33866/ The combined effect of Al-5Ti-1B and Al-10Sr on the metallurgical properties of LM6 Al-Si sand castings Lim, Y. P. Sulaiman, Shamsuddin Hamouda, Abdel Magid Salem Megat Ahmad, Megat Mohamad Hamdan Al-5Ti-1B is one of the prevalent grain refiners for Al-Si alloys in casting industry; on the other hand, Al-10Sr is one of the effective modifiers for Al-Si alloys. Grain refiners serve the purpose of refining the grain size of solidified castings while modifiers such as sodium and strontium are added to change the morphology. A hybrid modifier consists of 0.5wt% Al-5Ti-1B and Al-10Sr respectively has been formulated and inoculated into the melt of hypoeutectic LM6 Al-Si alloy to produce a slab casting by CO2 sand casting process. The geometry of the casting is purposely designed to have different thicknesses so as to induce directional solidification. This research work is aimed to study the combined effect of grain refiner and modifier on the metallurgical properties of LM6 sand castings. The significant finding is that a nearly full eutectic solidification is achieved in the casting. The cooling rates are also observed to be faster than those of solely grain-refined and original unmodified LM6 castings. The hardness is not significantly improved but the ultimate tensile strength can be further improved by 3.7% compared to that of castings grain-refined by 0.5wt% Al-5Ti-1B. The strain at UTS is significantly improved by 188% indicating better ductility. The metallographic observations show that the SDAS is coarser, but the eutectic phase is finer and in fibrous form in the Sr-modified LM6 castings. Universiti Putra Malaysia Press 2005 Conference or Workshop Item NonPeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/33866/1/33866.pdf Lim, Y. P. and Sulaiman, Shamsuddin and Hamouda, Abdel Magid Salem and Megat Ahmad, Megat Mohamad Hamdan (2005) The combined effect of Al-5Ti-1B and Al-10Sr on the metallurgical properties of LM6 Al-Si sand castings. In: International Advanced Technology Congress: Conference on Advanced Materials (CAM 2005), 6 - 8 Dec. 2005, Putrajaya, Malaysia. (pp. 394-407).
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Al-5Ti-1B is one of the prevalent grain refiners for Al-Si alloys in casting industry; on the other hand, Al-10Sr is one of the effective modifiers for Al-Si alloys. Grain refiners serve the purpose of refining the grain size of solidified castings while modifiers such as sodium and strontium are added to change the morphology. A hybrid modifier consists of 0.5wt% Al-5Ti-1B and Al-10Sr respectively has been formulated and inoculated into the melt of hypoeutectic LM6 Al-Si alloy to produce a slab casting by CO2 sand casting process. The geometry of the casting is purposely designed to have different thicknesses so as to induce directional solidification. This research work is aimed to study the combined effect of grain refiner and modifier on the metallurgical properties of LM6 sand castings. The significant finding is that a nearly full eutectic solidification is achieved in the casting. The cooling rates are also observed to be faster than those of solely grain-refined and original unmodified LM6 castings. The hardness is not significantly improved but the ultimate tensile strength can be further improved by 3.7% compared to that of castings grain-refined by 0.5wt% Al-5Ti-1B. The strain at UTS is significantly improved by 188% indicating better ductility. The metallographic observations show that the SDAS is coarser, but the eutectic phase is finer and in fibrous form in the Sr-modified LM6 castings.
format Conference or Workshop Item
author Lim, Y. P.
Sulaiman, Shamsuddin
Hamouda, Abdel Magid Salem
Megat Ahmad, Megat Mohamad Hamdan
spellingShingle Lim, Y. P.
Sulaiman, Shamsuddin
Hamouda, Abdel Magid Salem
Megat Ahmad, Megat Mohamad Hamdan
The combined effect of Al-5Ti-1B and Al-10Sr on the metallurgical properties of LM6 Al-Si sand castings
author_facet Lim, Y. P.
Sulaiman, Shamsuddin
Hamouda, Abdel Magid Salem
Megat Ahmad, Megat Mohamad Hamdan
author_sort Lim, Y. P.
title The combined effect of Al-5Ti-1B and Al-10Sr on the metallurgical properties of LM6 Al-Si sand castings
title_short The combined effect of Al-5Ti-1B and Al-10Sr on the metallurgical properties of LM6 Al-Si sand castings
title_full The combined effect of Al-5Ti-1B and Al-10Sr on the metallurgical properties of LM6 Al-Si sand castings
title_fullStr The combined effect of Al-5Ti-1B and Al-10Sr on the metallurgical properties of LM6 Al-Si sand castings
title_full_unstemmed The combined effect of Al-5Ti-1B and Al-10Sr on the metallurgical properties of LM6 Al-Si sand castings
title_sort combined effect of al-5ti-1b and al-10sr on the metallurgical properties of lm6 al-si sand castings
publisher Universiti Putra Malaysia Press
publishDate 2005
url http://psasir.upm.edu.my/id/eprint/33866/1/33866.pdf
http://psasir.upm.edu.my/id/eprint/33866/
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score 13.211869

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