Influence of friction stir process on microstructure and tensile properties of LM28 hypereutectic al-si alloy
This paper reports an investigation of the influence of friction stir processing (FSP) on the microstructure modification, tensile properties and hardness of as cast hypereutectic LM28 aluminium silicon (Al-Si) alloy, aimed to decrease Silicon particles size, porosity, and enhancing tensile properti...
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| Format: | Article |
| Language: | English |
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Penerbit UTHM
2018
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| Online Access: | http://eprints.uthm.edu.my/3599/ http://eprints.uthm.edu.my/3599/1/AJ%202019%20%28145%29.pdf |
| _version_ | 1848888063222087680 |
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| author | Abdulmalik, Samir Sani Ahmad, Rosli |
| author_facet | Abdulmalik, Samir Sani Ahmad, Rosli |
| author_sort | Abdulmalik, Samir Sani |
| building | UTHM Institutional Repository |
| collection | Online Access |
| description | This paper reports an investigation of the influence of friction stir processing (FSP) on the microstructure modification, tensile properties and hardness of as cast hypereutectic LM28 aluminium silicon (Al-Si) alloy, aimed to decrease Silicon particles size, porosity, and enhancing tensile properties. Intense plastic deformation foisted by FSP resulted in a remarkable breaking up of the coarse eutectic and primary silicon particles into smaller ones, and closure of porosity. The area sizes of the fragmented Si particles decreased from 155.1 μm² to around 49.4 μm², aspect ratio of about 2.86 in the as cast condition decreased to around 1.63 after FSP. Porosity was also drastically reduced from 94 μm ECD, in the as cast condition to as low as 7.1 μm ECD. The strength and ductility of the alloy increased simultaneously after FSP. The increase in the tensile strength and ductility values after FSP, as compare to the as cast alloy was around 1.56, and 4.38 times respectively. The LM28 FS-processed alloy displayed an increase in quality index of around 1.97 times higher, than that of the as-cast alloy. The hardness of the alloy increased from 64.6 HV for the as-cast alloy to about 85.74 HV after FSP. Enhancement in all the properties was largely related to the pronounced changes of the shape, area size and distribution of the silicon particles along with the reduction of porosity FSP. |
| first_indexed | 2025-11-15T20:04:19Z |
| format | Article |
| id | uthm-3599 |
| institution | Universiti Tun Hussein Onn Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T20:04:19Z |
| publishDate | 2018 |
| publisher | Penerbit UTHM |
| recordtype | eprints |
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| spelling | uthm-35992021-11-21T03:15:22Z http://eprints.uthm.edu.my/3599/ Influence of friction stir process on microstructure and tensile properties of LM28 hypereutectic al-si alloy Abdulmalik, Samir Sani Ahmad, Rosli TS200-770 Metal manufactures. Metalworking This paper reports an investigation of the influence of friction stir processing (FSP) on the microstructure modification, tensile properties and hardness of as cast hypereutectic LM28 aluminium silicon (Al-Si) alloy, aimed to decrease Silicon particles size, porosity, and enhancing tensile properties. Intense plastic deformation foisted by FSP resulted in a remarkable breaking up of the coarse eutectic and primary silicon particles into smaller ones, and closure of porosity. The area sizes of the fragmented Si particles decreased from 155.1 μm² to around 49.4 μm², aspect ratio of about 2.86 in the as cast condition decreased to around 1.63 after FSP. Porosity was also drastically reduced from 94 μm ECD, in the as cast condition to as low as 7.1 μm ECD. The strength and ductility of the alloy increased simultaneously after FSP. The increase in the tensile strength and ductility values after FSP, as compare to the as cast alloy was around 1.56, and 4.38 times respectively. The LM28 FS-processed alloy displayed an increase in quality index of around 1.97 times higher, than that of the as-cast alloy. The hardness of the alloy increased from 64.6 HV for the as-cast alloy to about 85.74 HV after FSP. Enhancement in all the properties was largely related to the pronounced changes of the shape, area size and distribution of the silicon particles along with the reduction of porosity FSP. Penerbit UTHM 2018 Article PeerReviewed text en http://eprints.uthm.edu.my/3599/1/AJ%202019%20%28145%29.pdf Abdulmalik, Samir Sani and Ahmad, Rosli (2018) Influence of friction stir process on microstructure and tensile properties of LM28 hypereutectic al-si alloy. International Journal of Integrated Engineering: Special Issue 2018: Center for Graduate Studies, 10 (3). pp. 63-68. ISSN 2229-838X |
| spellingShingle | TS200-770 Metal manufactures. Metalworking Abdulmalik, Samir Sani Ahmad, Rosli Influence of friction stir process on microstructure and tensile properties of LM28 hypereutectic al-si alloy |
| title | Influence of friction stir process on microstructure and tensile properties of LM28 hypereutectic al-si alloy |
| title_full | Influence of friction stir process on microstructure and tensile properties of LM28 hypereutectic al-si alloy |
| title_fullStr | Influence of friction stir process on microstructure and tensile properties of LM28 hypereutectic al-si alloy |
| title_full_unstemmed | Influence of friction stir process on microstructure and tensile properties of LM28 hypereutectic al-si alloy |
| title_short | Influence of friction stir process on microstructure and tensile properties of LM28 hypereutectic al-si alloy |
| title_sort | influence of friction stir process on microstructure and tensile properties of lm28 hypereutectic al-si alloy |
| topic | TS200-770 Metal manufactures. Metalworking |
| url | http://eprints.uthm.edu.my/3599/ http://eprints.uthm.edu.my/3599/1/AJ%202019%20%28145%29.pdf |