Enhancement of the Mechanical Properties in Al–Si–Cu–Fe–Mg Alloys with Various Processing Parameters
In this research, various processing conditions were implemented to enhance the mechanical properties of Al-Si alloys. The silicon content was varied from hypoeutectic (Si-10 wt.%) to eutectic (Si-12.6 wt.%) and hypereutectic (Si-14 wt.%) for the preparation of Al-XSi-3Cu-0.5Fe-0.6 Mg (X = 10...
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doaj-10c7ff804822433dbb0e0212b5444e232020-11-24T21:41:37ZengMDPI AGMaterials1996-19442018-11-011111215010.3390/ma11112150ma11112150Enhancement of the Mechanical Properties in Al–Si–Cu–Fe–Mg Alloys with Various Processing ParametersSu-Seong Ahn0Sharief Pathan1Jar-Myung Koo2Chang-Hyun Baeg3Chan-Uk Jeong4Hyoen-Taek Son5Yong-Ho Kim6Kap-Ho Lee7Soon-Jik Hong8Division of Advanced Materials Engineering, Kongju National University, Cheonan-si 331-717, KoreaDivision of Advanced Materials Engineering, Kongju National University, Cheonan-si 331-717, KoreaDivision of Advanced Materials Engineering, Kongju National University, Cheonan-si 331-717, KoreaDongyang A.K Korea Co. Ltd., 3rd plant/R&D center 70, Wonhapgang 1-gil, Yeondong-myeon, Sejong 30067, KoreaDongyang A.K Korea Co. Ltd., 3rd plant/R&D center 70, Wonhapgang 1-gil, Yeondong-myeon, Sejong 30067, KoreaKorea Institute of Industrial Technology, Gwangju, 61011, KoreaKorea Institute of Industrial Technology, Gwangju, 61011, KoreaDepartment of Materials Science & Engineering, Chungnam National University, Daejeon 34134, KoreaDivision of Advanced Materials Engineering, Kongju National University, Cheonan-si 331-717, KoreaIn this research, various processing conditions were implemented to enhance the mechanical properties of Al-Si alloys. The silicon content was varied from hypoeutectic (Si-10 wt.%) to eutectic (Si-12.6 wt.%) and hypereutectic (Si-14 wt.%) for the preparation of Al-XSi-3Cu-0.5Fe-0.6 Mg (X = 10⁻14%) alloys using die casting. Subsequently, these alloys were hot-extruded with an optimum extrusion ratio (17:1) at 400 °C to match the output extruded bar to the compressor size. An analysis of the microstructural features along with a chemical compositional analysis were carried out using scanning electron microscope along with energy dispersive X-ray spectroscopy and transmission electron microscope. The SEM micrographs of the extruded samples displayed cracks in primary Si, and the intermetallic (β-Al<sub>5</sub>FeSi) phase was fragmented accordingly. In addition, the silicon phase was homogenously distributed, and the size remained constant. The mechanical properties of the extruded samples were enhanced by the increase of silicon content, and consequently the ductility decreased. By implementing proper T6 heat treatment parameters, coherent Al<sub>2</sub>Cu phases were formed in the Al matrix, and the Si phase was gradually increased along with the silicon content. Therefore, high tensile strength was achieved, reaching values for the Al-XSi-3Cu-0.5Fe-0.6Mg (X = 10⁻14%) alloys of 366 MPa, 388 MPa, and 420 MPa, respectively.https://www.mdpi.com/1996-1944/11/11/2150Al-Si alloyextrusionmicrostructureT6 heat treatmentsilicon content |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Su-Seong Ahn Sharief Pathan Jar-Myung Koo Chang-Hyun Baeg Chan-Uk Jeong Hyoen-Taek Son Yong-Ho Kim Kap-Ho Lee Soon-Jik Hong |
spellingShingle |
Su-Seong Ahn Sharief Pathan Jar-Myung Koo Chang-Hyun Baeg Chan-Uk Jeong Hyoen-Taek Son Yong-Ho Kim Kap-Ho Lee Soon-Jik Hong Enhancement of the Mechanical Properties in Al–Si–Cu–Fe–Mg Alloys with Various Processing Parameters Materials Al-Si alloy extrusion microstructure T6 heat treatment silicon content |
author_facet |
Su-Seong Ahn Sharief Pathan Jar-Myung Koo Chang-Hyun Baeg Chan-Uk Jeong Hyoen-Taek Son Yong-Ho Kim Kap-Ho Lee Soon-Jik Hong |
author_sort |
Su-Seong Ahn |
title |
Enhancement of the Mechanical Properties in Al–Si–Cu–Fe–Mg Alloys with Various Processing Parameters |
title_short |
Enhancement of the Mechanical Properties in Al–Si–Cu–Fe–Mg Alloys with Various Processing Parameters |
title_full |
Enhancement of the Mechanical Properties in Al–Si–Cu–Fe–Mg Alloys with Various Processing Parameters |
title_fullStr |
Enhancement of the Mechanical Properties in Al–Si–Cu–Fe–Mg Alloys with Various Processing Parameters |
title_full_unstemmed |
Enhancement of the Mechanical Properties in Al–Si–Cu–Fe–Mg Alloys with Various Processing Parameters |
title_sort |
enhancement of the mechanical properties in al–si–cu–fe–mg alloys with various processing parameters |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2018-11-01 |
description |
In this research, various processing conditions were implemented to enhance the mechanical properties of Al-Si alloys. The silicon content was varied from hypoeutectic (Si-10 wt.%) to eutectic (Si-12.6 wt.%) and hypereutectic (Si-14 wt.%) for the preparation of Al-XSi-3Cu-0.5Fe-0.6 Mg (X = 10⁻14%) alloys using die casting. Subsequently, these alloys were hot-extruded with an optimum extrusion ratio (17:1) at 400 °C to match the output extruded bar to the compressor size. An analysis of the microstructural features along with a chemical compositional analysis were carried out using scanning electron microscope along with energy dispersive X-ray spectroscopy and transmission electron microscope. The SEM micrographs of the extruded samples displayed cracks in primary Si, and the intermetallic (β-Al<sub>5</sub>FeSi) phase was fragmented accordingly. In addition, the silicon phase was homogenously distributed, and the size remained constant. The mechanical properties of the extruded samples were enhanced by the increase of silicon content, and consequently the ductility decreased. By implementing proper T6 heat treatment parameters, coherent Al<sub>2</sub>Cu phases were formed in the Al matrix, and the Si phase was gradually increased along with the silicon content. Therefore, high tensile strength was achieved, reaching values for the Al-XSi-3Cu-0.5Fe-0.6Mg (X = 10⁻14%) alloys of 366 MPa, 388 MPa, and 420 MPa, respectively. |
topic |
Al-Si alloy extrusion microstructure T6 heat treatment silicon content |
url |
https://www.mdpi.com/1996-1944/11/11/2150 |
work_keys_str_mv |
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