Effect of silicon on strength and fracture surfaces of aluminium–silicon casting and heat treated alloys

Effect of silicon on strength and fracture surfaces of aluminium–silicon casting and heat treated alloys

Aluminium-silicon alloys having different silicon contents (13, 20 and 27 percent) were used in the present study. The molten alloys were poured in to a mild steel die to cast tensile test bars. Then tensile and hardness tests were performed in order to analyze the properties and fracture surfaces o...

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Main Authors: Haque, Md. Mohafizul, Hussein, Nur Izan Syahriah, Ismail, Ahmad Faris
Format: Article
Language:English
Published: Trans Tech Publications, Switzerland 2006
Subjects:
TA401 Materials of engineering and construction
Online Access:http://irep.iium.edu.my/36836/
http://irep.iium.edu.my/36836/
http://irep.iium.edu.my/36836/
http://irep.iium.edu.my/36836/1/Key_Engr_Mat.pdf
id iium-36836
recordtype eprints
spelling iium-368362017-06-14T03:42:34Z http://irep.iium.edu.my/36836/ Effect of silicon on strength and fracture surfaces of aluminium–silicon casting and heat treated alloys Haque, Md. Mohafizul Hussein, Nur Izan Syahriah Ismail, Ahmad Faris TA401 Materials of engineering and construction Aluminium-silicon alloys having different silicon contents (13, 20 and 27 percent) were used in the present study. The molten alloys were poured in to a mild steel die to cast tensile test bars. Then tensile and hardness tests were performed in order to analyze the properties and fracture surfaces of the cast specimens. Results show that as silicon content increases, the alloy becomes harder and less ductile. At the same time, the presence of alloying and impurity elements in the alloys forms complex compounds and intermetallic phases. They present deleterious effects on the strength of the alloys, causing a lowering of the energy required to fracture the test specimens with little permanent extension. However, heat treatment operations altered the structures and properties of the aluminium-silicon alloys. Heating to higher temperature, then quenching, ageing and tempering make the alloys stronger up to 13% silicon and beyond that limit the alloys become weaker, fracturing at lower load. The appearance of fracture surfaces after tensile testing showed these differences. This investigation also suggests that for the aluminium-silicon alloys containing 20% and 27% silicon do not require any expensive and time consuming thermal treatment operations, since properties do not improve with such treatments. Trans Tech Publications, Switzerland 2006 Article PeerReviewed application/pdf en http://irep.iium.edu.my/36836/1/Key_Engr_Mat.pdf Haque, Md. Mohafizul and Hussein, Nur Izan Syahriah and Ismail, Ahmad Faris (2006) Effect of silicon on strength and fracture surfaces of aluminium–silicon casting and heat treated alloys. Key Engineering Materials, 306/8. pp. 893-898. ISSN 1013-9826 http://www.scientific.net/KEM.306-308.893 10.4028/www.scientific.net/KEM.306-308.893
repository_type Digital Repository
institution_category Local University
institution International Islamic University Malaysia
building IIUM Repository
collection Online Access
language English
topic TA401 Materials of engineering and construction
spellingShingle TA401 Materials of engineering and construction
Haque, Md. Mohafizul
Hussein, Nur Izan Syahriah
Ismail, Ahmad Faris
Effect of silicon on strength and fracture surfaces of aluminium–silicon casting and heat treated alloys
description Aluminium-silicon alloys having different silicon contents (13, 20 and 27 percent) were used in the present study. The molten alloys were poured in to a mild steel die to cast tensile test bars. Then tensile and hardness tests were performed in order to analyze the properties and fracture surfaces of the cast specimens. Results show that as silicon content increases, the alloy becomes harder and less ductile. At the same time, the presence of alloying and impurity elements in the alloys forms complex compounds and intermetallic phases. They present deleterious effects on the strength of the alloys, causing a lowering of the energy required to fracture the test specimens with little permanent extension. However, heat treatment operations altered the structures and properties of the aluminium-silicon alloys. Heating to higher temperature, then quenching, ageing and tempering make the alloys stronger up to 13% silicon and beyond that limit the alloys become weaker, fracturing at lower load. The appearance of fracture surfaces after tensile testing showed these differences. This investigation also suggests that for the aluminium-silicon alloys containing 20% and 27% silicon do not require any expensive and time consuming thermal treatment operations, since properties do not improve with such treatments.
format Article
author Haque, Md. Mohafizul
Hussein, Nur Izan Syahriah
Ismail, Ahmad Faris
author_facet Haque, Md. Mohafizul
Hussein, Nur Izan Syahriah
Ismail, Ahmad Faris
author_sort Haque, Md. Mohafizul
title Effect of silicon on strength and fracture surfaces of aluminium–silicon casting and heat treated alloys
title_short Effect of silicon on strength and fracture surfaces of aluminium–silicon casting and heat treated alloys
title_full Effect of silicon on strength and fracture surfaces of aluminium–silicon casting and heat treated alloys
title_fullStr Effect of silicon on strength and fracture surfaces of aluminium–silicon casting and heat treated alloys
title_full_unstemmed Effect of silicon on strength and fracture surfaces of aluminium–silicon casting and heat treated alloys
title_sort effect of silicon on strength and fracture surfaces of aluminium–silicon casting and heat treated alloys
publisher Trans Tech Publications, Switzerland
publishDate 2006
url http://irep.iium.edu.my/36836/
http://irep.iium.edu.my/36836/
http://irep.iium.edu.my/36836/
http://irep.iium.edu.my/36836/1/Key_Engr_Mat.pdf
first_indexed 2023-09-18T20:52:49Z
last_indexed 2023-09-18T20:52:49Z
_version_ 1777410107777220608

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