Solidification behavior and enhanced properties of semi-solid Al–8Si–0.5Fe alloys fabricated by rheo-diecasting
Compared with the high pressure diecasting, rheo-diecasting has an advantage in decreasing defects, refining microstructure and improving properties. In the present work, an Al–8Si–0.5Fe alloy with a good combination of mechanical property and thermal conductivity was obtained by rheo-diecasting. Th...
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| Format: | Article |
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Elsevier
2022-07-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422009243 |
| _version_ | 1811281334806511616 |
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| author | Yan Liu Minqiang Gao Shuancheng Meng Ying Fu Weirong Li Chunhua Li Renguo Guan |
| author_facet | Yan Liu Minqiang Gao Shuancheng Meng Ying Fu Weirong Li Chunhua Li Renguo Guan |
| author_sort | Yan Liu |
| collection | DOAJ |
| description | Compared with the high pressure diecasting, rheo-diecasting has an advantage in decreasing defects, refining microstructure and improving properties. In the present work, an Al–8Si–0.5Fe alloy with a good combination of mechanical property and thermal conductivity was obtained by rheo-diecasting. The solidification behavior, mechanical properties, and thermal conductivity of the alloy under rheo-diecasting were discussed. The results demonstrated that the chilling effect and shearing vibration not only affected the primary solidification on the vibrating contraction sloping plate, but also the secondary solidification in the remaining liquid during rheo-diecasting. The rheo-diecasting alloy possessed spherical primary α1-Al grains and secondary α2-Al grains, small-sized Al5FeSi phases, eutectic Si phases, and low porosities, and thus exhibited the high mechanical properties and thermal conductivity. With decreasing pouring temperature from 690 °C to 670 °C, the size of primary α1-Al grains, secondary α2-Al grains, Al5FeSi phases and eutectic Si phases was decreased due to high cooling rate, which further improved the mechanical properties and thermal conductivity of the alloy. |
| first_indexed | 2024-04-13T01:31:49Z |
| format | Article |
| id | doaj.art-32115252582941299d2a9f2c95ae8182 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-13T01:31:49Z |
| publishDate | 2022-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-32115252582941299d2a9f2c95ae81822022-12-22T03:08:29ZengElsevierJournal of Materials Research and Technology2238-78542022-07-011931603171Solidification behavior and enhanced properties of semi-solid Al–8Si–0.5Fe alloys fabricated by rheo-diecastingYan Liu0Minqiang Gao1Shuancheng Meng2Ying Fu3Weirong Li4Chunhua Li5Renguo Guan6School of Materials Science and Engineering, Northeastern University, Shenyang 110819, ChinaKey Laboratory of Near-Net Forming of Light Metals of Liaoning Province, Dalian Jiaotong University, Dalian 116028, China; Engineering Research Center of Continuous Extrusion, Ministry of Education, Dalian Jiaotong University, Dalian 116028, China; Corresponding author.School of Materials Science and Engineering, Northeastern University, Shenyang 110819, ChinaKey Laboratory of Near-Net Forming of Light Metals of Liaoning Province, Dalian Jiaotong University, Dalian 116028, China; Engineering Research Center of Continuous Extrusion, Ministry of Education, Dalian Jiaotong University, Dalian 116028, China; Corresponding author.Dongguan Eontec Co., Ltd, Dongguan 523662, ChinaDongguan Eontec Co., Ltd, Dongguan 523662, ChinaSchool of Materials Science and Engineering, Northeastern University, Shenyang 110819, China; Key Laboratory of Near-Net Forming of Light Metals of Liaoning Province, Dalian Jiaotong University, Dalian 116028, China; Engineering Research Center of Continuous Extrusion, Ministry of Education, Dalian Jiaotong University, Dalian 116028, ChinaCompared with the high pressure diecasting, rheo-diecasting has an advantage in decreasing defects, refining microstructure and improving properties. In the present work, an Al–8Si–0.5Fe alloy with a good combination of mechanical property and thermal conductivity was obtained by rheo-diecasting. The solidification behavior, mechanical properties, and thermal conductivity of the alloy under rheo-diecasting were discussed. The results demonstrated that the chilling effect and shearing vibration not only affected the primary solidification on the vibrating contraction sloping plate, but also the secondary solidification in the remaining liquid during rheo-diecasting. The rheo-diecasting alloy possessed spherical primary α1-Al grains and secondary α2-Al grains, small-sized Al5FeSi phases, eutectic Si phases, and low porosities, and thus exhibited the high mechanical properties and thermal conductivity. With decreasing pouring temperature from 690 °C to 670 °C, the size of primary α1-Al grains, secondary α2-Al grains, Al5FeSi phases and eutectic Si phases was decreased due to high cooling rate, which further improved the mechanical properties and thermal conductivity of the alloy.http://www.sciencedirect.com/science/article/pii/S2238785422009243Semi-solid aluminum alloyRheo-diecastingSolidificationMechanical propertyThermal conductivity |
| spellingShingle | Yan Liu Minqiang Gao Shuancheng Meng Ying Fu Weirong Li Chunhua Li Renguo Guan Solidification behavior and enhanced properties of semi-solid Al–8Si–0.5Fe alloys fabricated by rheo-diecasting Journal of Materials Research and Technology Semi-solid aluminum alloy Rheo-diecasting Solidification Mechanical property Thermal conductivity |
| title | Solidification behavior and enhanced properties of semi-solid Al–8Si–0.5Fe alloys fabricated by rheo-diecasting |
| title_full | Solidification behavior and enhanced properties of semi-solid Al–8Si–0.5Fe alloys fabricated by rheo-diecasting |
| title_fullStr | Solidification behavior and enhanced properties of semi-solid Al–8Si–0.5Fe alloys fabricated by rheo-diecasting |
| title_full_unstemmed | Solidification behavior and enhanced properties of semi-solid Al–8Si–0.5Fe alloys fabricated by rheo-diecasting |
| title_short | Solidification behavior and enhanced properties of semi-solid Al–8Si–0.5Fe alloys fabricated by rheo-diecasting |
| title_sort | solidification behavior and enhanced properties of semi solid al 8si 0 5fe alloys fabricated by rheo diecasting |
| topic | Semi-solid aluminum alloy Rheo-diecasting Solidification Mechanical property Thermal conductivity |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422009243 |
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