The Influence of Cryogenic Treatment on the Microstructure and Mechanical Characteristics of Aluminum Silicon Carbide Matrix Composites
Aluminum matrix composites have been widely used in aerospace and automotive fields due to their excellent physical properties. Cryogenic treatment was successfully adopted to improve the performance of aluminum alloy components, while its effect and mechanism on the aluminum matrix composite remain...
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MDPI AG
2023-01-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/1/396 |
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| author | Mingli Zhang Ran Pan Baosheng Liu Kaixuan Gu Zeju Weng Chen Cui Junjie Wang |
| author_facet | Mingli Zhang Ran Pan Baosheng Liu Kaixuan Gu Zeju Weng Chen Cui Junjie Wang |
| author_sort | Mingli Zhang |
| collection | DOAJ |
| description | Aluminum matrix composites have been widely used in aerospace and automotive fields due to their excellent physical properties. Cryogenic treatment was successfully adopted to improve the performance of aluminum alloy components, while its effect and mechanism on the aluminum matrix composite remained unclear. In this work, the effects of cryogenic treatment on the microstructure evolution and mechanical properties of 15%SiCp/2009 aluminum matrix composites were systematically investigated by means of Thermoelectric Power (TEP), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). The results showed that TEP measurement can be an effective method for evaluating the precipitation characteristics of 15%SiCp/2009 aluminum matrix composites during aging. The addition of cryogenic treatment after solution and before aging treatment promoted the precipitation from the beginning stage of aging. Furthermore, the aging time for the maximum precipitation of the θ″ phase was about 4 h advanced, as the conduction of cryogenic treatment accelerates the aging kinetics. This was attributed to the great difference in the linear expansion coefficient between the aluminum alloy matrix and SiC-reinforced particles, which could induce high internal stress in their boundaries for precipitation. Moreover, the lattice contraction of the aluminum alloy matrix during cryogenic treatment led to the increase in dislocation density and micro defects near the boundaries, thus providing more nucleation sites for precipitation during the aging treatment. After undergoing artificial aging treatment for 20 h, the increase in dispersive, distributed precipitates after cryogenic treatment improved the hardness and yield strength by 4% and 16 MPa, respectively. |
| first_indexed | 2024-03-11T09:55:00Z |
| format | Article |
| id | doaj.art-691abf0da68e4555bc1ee0bef7d5e396 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T09:55:00Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-691abf0da68e4555bc1ee0bef7d5e3962023-11-16T15:51:06ZengMDPI AGMaterials1996-19442023-01-0116139610.3390/ma16010396The Influence of Cryogenic Treatment on the Microstructure and Mechanical Characteristics of Aluminum Silicon Carbide Matrix CompositesMingli Zhang0Ran Pan1Baosheng Liu2Kaixuan Gu3Zeju Weng4Chen Cui5Junjie Wang6CAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Beijing 100190, ChinaAVIC Manufacturing Technology Institute, Beijing 100024, ChinaAVIC Manufacturing Technology Institute, Beijing 100024, ChinaCAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Beijing 100190, ChinaCAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Beijing 100190, ChinaCAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Beijing 100190, ChinaCAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Beijing 100190, ChinaAluminum matrix composites have been widely used in aerospace and automotive fields due to their excellent physical properties. Cryogenic treatment was successfully adopted to improve the performance of aluminum alloy components, while its effect and mechanism on the aluminum matrix composite remained unclear. In this work, the effects of cryogenic treatment on the microstructure evolution and mechanical properties of 15%SiCp/2009 aluminum matrix composites were systematically investigated by means of Thermoelectric Power (TEP), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). The results showed that TEP measurement can be an effective method for evaluating the precipitation characteristics of 15%SiCp/2009 aluminum matrix composites during aging. The addition of cryogenic treatment after solution and before aging treatment promoted the precipitation from the beginning stage of aging. Furthermore, the aging time for the maximum precipitation of the θ″ phase was about 4 h advanced, as the conduction of cryogenic treatment accelerates the aging kinetics. This was attributed to the great difference in the linear expansion coefficient between the aluminum alloy matrix and SiC-reinforced particles, which could induce high internal stress in their boundaries for precipitation. Moreover, the lattice contraction of the aluminum alloy matrix during cryogenic treatment led to the increase in dislocation density and micro defects near the boundaries, thus providing more nucleation sites for precipitation during the aging treatment. After undergoing artificial aging treatment for 20 h, the increase in dispersive, distributed precipitates after cryogenic treatment improved the hardness and yield strength by 4% and 16 MPa, respectively.https://www.mdpi.com/1996-1944/16/1/39615%SiCp/2009 aluminum matrix compositecryogenic treatmentthermoelectric poweraging behaviortensile property |
| spellingShingle | Mingli Zhang Ran Pan Baosheng Liu Kaixuan Gu Zeju Weng Chen Cui Junjie Wang The Influence of Cryogenic Treatment on the Microstructure and Mechanical Characteristics of Aluminum Silicon Carbide Matrix Composites Materials 15%SiCp/2009 aluminum matrix composite cryogenic treatment thermoelectric power aging behavior tensile property |
| title | The Influence of Cryogenic Treatment on the Microstructure and Mechanical Characteristics of Aluminum Silicon Carbide Matrix Composites |
| title_full | The Influence of Cryogenic Treatment on the Microstructure and Mechanical Characteristics of Aluminum Silicon Carbide Matrix Composites |
| title_fullStr | The Influence of Cryogenic Treatment on the Microstructure and Mechanical Characteristics of Aluminum Silicon Carbide Matrix Composites |
| title_full_unstemmed | The Influence of Cryogenic Treatment on the Microstructure and Mechanical Characteristics of Aluminum Silicon Carbide Matrix Composites |
| title_short | The Influence of Cryogenic Treatment on the Microstructure and Mechanical Characteristics of Aluminum Silicon Carbide Matrix Composites |
| title_sort | influence of cryogenic treatment on the microstructure and mechanical characteristics of aluminum silicon carbide matrix composites |
| topic | 15%SiCp/2009 aluminum matrix composite cryogenic treatment thermoelectric power aging behavior tensile property |
| url | https://www.mdpi.com/1996-1944/16/1/396 |
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