Microstructure and tensile properties of aluminum powder metallurgy alloy prepared by a novel low-pressure sintering
This paper proposed a novel low-pressure sintering process contraposing to characteristics of pre-alloyed aluminum powders and analyzed its feasibility. The low pressure was set to 0.1 MPa in this study. Meanwhile, 0 MPa and 10 MPa were set as control group. With gas-atomized 2024 aluminum powders a...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785421007377 |
| _version_ | 1818728807107919872 |
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| author | Lei Wu Zhaoji Yu Chao Liu Yunzhu Ma Yufeng Huang Tao Wang Lun Yang Huanyuan Yan Wensheng Liu |
| author_facet | Lei Wu Zhaoji Yu Chao Liu Yunzhu Ma Yufeng Huang Tao Wang Lun Yang Huanyuan Yan Wensheng Liu |
| author_sort | Lei Wu |
| collection | DOAJ |
| description | This paper proposed a novel low-pressure sintering process contraposing to characteristics of pre-alloyed aluminum powders and analyzed its feasibility. The low pressure was set to 0.1 MPa in this study. Meanwhile, 0 MPa and 10 MPa were set as control group. With gas-atomized 2024 aluminum powders as raw material, the microstructure and tensile properties of specimens sintered under three orders of magnitude of pressure (0 MPa, 0.1 MPa and 10 MPa) at two representative temperatures (525 °C and 575 °C) were compared. The results showed that it was difficult for pressureless sintering (0 MPa) to densify pre-alloyed aluminum powders, but low-pressure sintering could. As the liquid phase formed at supersolidus temperature was squeezed out, the loss of alloying elements such as Cu and Mg, which would play an important role in subsequent heat treatment, during low-pressure sintering was apparently less than that of 10 MPa. The density of aluminum sintered under 0.1 MPa at 575 °C was 2.732 g/cm3 and the ultimate tensile strength was 228.16 MPa with ductility of 12 %, which achieved a good balance of plasticity and strength. These findings will bring new insights to the industrialization of aluminum powder metallurgy (APM). |
| first_indexed | 2024-12-17T22:35:51Z |
| format | Article |
| id | doaj.art-fcf3579293dd4e71b8c2ba1eb4a628f8 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-17T22:35:51Z |
| publishDate | 2021-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-fcf3579293dd4e71b8c2ba1eb4a628f82022-12-21T21:30:05ZengElsevierJournal of Materials Research and Technology2238-78542021-09-011414191429Microstructure and tensile properties of aluminum powder metallurgy alloy prepared by a novel low-pressure sinteringLei Wu0Zhaoji Yu1Chao Liu2Yunzhu Ma3Yufeng Huang4Tao Wang5Lun Yang6Huanyuan Yan7Wensheng Liu8National Key Laboratory of Science and Technology on High-strength Structural Materials, Central South University, Changsha, 410083, ChinaNational Key Laboratory of Science and Technology on High-strength Structural Materials, Central South University, Changsha, 410083, ChinaCorresponding author.; National Key Laboratory of Science and Technology on High-strength Structural Materials, Central South University, Changsha, 410083, ChinaCorresponding author.; National Key Laboratory of Science and Technology on High-strength Structural Materials, Central South University, Changsha, 410083, ChinaNational Key Laboratory of Science and Technology on High-strength Structural Materials, Central South University, Changsha, 410083, ChinaNational Key Laboratory of Science and Technology on High-strength Structural Materials, Central South University, Changsha, 410083, ChinaNational Key Laboratory of Science and Technology on High-strength Structural Materials, Central South University, Changsha, 410083, ChinaNational Key Laboratory of Science and Technology on High-strength Structural Materials, Central South University, Changsha, 410083, ChinaNational Key Laboratory of Science and Technology on High-strength Structural Materials, Central South University, Changsha, 410083, ChinaThis paper proposed a novel low-pressure sintering process contraposing to characteristics of pre-alloyed aluminum powders and analyzed its feasibility. The low pressure was set to 0.1 MPa in this study. Meanwhile, 0 MPa and 10 MPa were set as control group. With gas-atomized 2024 aluminum powders as raw material, the microstructure and tensile properties of specimens sintered under three orders of magnitude of pressure (0 MPa, 0.1 MPa and 10 MPa) at two representative temperatures (525 °C and 575 °C) were compared. The results showed that it was difficult for pressureless sintering (0 MPa) to densify pre-alloyed aluminum powders, but low-pressure sintering could. As the liquid phase formed at supersolidus temperature was squeezed out, the loss of alloying elements such as Cu and Mg, which would play an important role in subsequent heat treatment, during low-pressure sintering was apparently less than that of 10 MPa. The density of aluminum sintered under 0.1 MPa at 575 °C was 2.732 g/cm3 and the ultimate tensile strength was 228.16 MPa with ductility of 12 %, which achieved a good balance of plasticity and strength. These findings will bring new insights to the industrialization of aluminum powder metallurgy (APM).http://www.sciencedirect.com/science/article/pii/S2238785421007377Pre-alloyed aluminum powderLow-pressure sinteringLiquid phaseParticle boundaryMechanical properties |
| spellingShingle | Lei Wu Zhaoji Yu Chao Liu Yunzhu Ma Yufeng Huang Tao Wang Lun Yang Huanyuan Yan Wensheng Liu Microstructure and tensile properties of aluminum powder metallurgy alloy prepared by a novel low-pressure sintering Journal of Materials Research and Technology Pre-alloyed aluminum powder Low-pressure sintering Liquid phase Particle boundary Mechanical properties |
| title | Microstructure and tensile properties of aluminum powder metallurgy alloy prepared by a novel low-pressure sintering |
| title_full | Microstructure and tensile properties of aluminum powder metallurgy alloy prepared by a novel low-pressure sintering |
| title_fullStr | Microstructure and tensile properties of aluminum powder metallurgy alloy prepared by a novel low-pressure sintering |
| title_full_unstemmed | Microstructure and tensile properties of aluminum powder metallurgy alloy prepared by a novel low-pressure sintering |
| title_short | Microstructure and tensile properties of aluminum powder metallurgy alloy prepared by a novel low-pressure sintering |
| title_sort | microstructure and tensile properties of aluminum powder metallurgy alloy prepared by a novel low pressure sintering |
| topic | Pre-alloyed aluminum powder Low-pressure sintering Liquid phase Particle boundary Mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S2238785421007377 |
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