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...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Trans Tech Publications, Switzerland
2006
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/36836/1/Key_Engr_Mat.pdf |
| _version_ | 1796878800389144576 |
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| 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 |
| collection | IIUM |
| 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. |
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| format | Article |
| id | oai:generic.eprints.org:36836 |
| institution | International Islamic University Malaysia |
| language | English |
| last_indexed | 2024-03-05T23:26:40Z |
| publishDate | 2006 |
| publisher | Trans Tech Publications, Switzerland |
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| spelling | oai:generic.eprints.org: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 |
| 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 |
| title | 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_short | 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 |
| topic | TA401 Materials of engineering and construction |
| url | http://irep.iium.edu.my/36836/1/Key_Engr_Mat.pdf |
| work_keys_str_mv | AT haquemdmohafizul effectofsilicononstrengthandfracturesurfacesofaluminiumsiliconcastingandheattreatedalloys AT husseinnurizansyahriah effectofsilicononstrengthandfracturesurfacesofaluminiumsiliconcastingandheattreatedalloys AT ismailahmadfaris effectofsilicononstrengthandfracturesurfacesofaluminiumsiliconcastingandheattreatedalloys |