| Aging Behavior of High Volume Fraction SiC Particles Reinforced 2024Al Composite |
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| 引用本文： | Xiufang WANG,Gaohui WU,Dongli SUN,Longtao JIANG and Yuanyuan HANSchool of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,ChinaSchool of Materials Science and Engineering,Harbin Institute of Science and Technology,Harbin 150001,China. Aging Behavior of High Volume Fraction SiC Particles Reinforced 2024Al Composite[J]. 材料科学技术学报, 2004, 0(2) |
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| 作者姓名： | Xiufang WANG Gaohui WU Dongli SUN Longtao JIANG and Yuanyuan HANSchool of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 ChinaSchool of Materials Science and Engineering Harbin Institute of Science and Technology Harbin 150001 China |
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| 作者单位： | Xiufang WANG，Gaohui WU，Dongli SUN，Longtao JIANG and Yuanyuan HANSchool of Materials Science and Engineering，Harbin Institute of Technology，Harbin 150001，ChinaSchool of Materials Science and Engineering，Harbin Institute of Science and Technology，Harbin 150001，China |
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| 摘 要： | 2024 Al matrix composite reinforced by SiC particles with 45% volume fraction and 1μm diameter was successfully fabricated by squeeze-exhaust casting method. The aging behavior of SiCp/2024AI composite at four temperatures was investigated and compared to 2024 alloy. It was found that the addition of high volume fraction SiC particles does not alter the aging sequence, but it significantly accelerates the kinetics of precipitation in the composite matrices. Therefore, the aging peak of the composite appears earlier than that of 2024AI alloy. This is attributed to the decrease in the activation energy for the precipitate formation and the increase in the precipitate growth rate due to the high density dislocations in the composite with high volume fraction particles. The high density dislocations, as preferential nucleation sites for precipitates, bring about the tiny and dense precipitates in the composite.
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Aging Behavior of High Volume Fraction SiC Particles Reinforced 2024A1 Composite |
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| Xiufang WANG,Gaohui WU,Dongli SUN,Longtao JIANG and Yuanyuan HANSchool of Materials Science and Engineering,Harbin Institute of Technology,Harbin ,ChinaSchool of Materials Science and Engineering,Harbin Institute of Science and Technology,Harbin ,China. Aging Behavior of High Volume Fraction SiC Particles Reinforced 2024A1 Composite[J]. Journal of Materials Science & Technology, 2004, 0(2) |
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| Authors: | Xiufang WANG Gaohui WU Dongli SUN Longtao JIANG Yuanyuan HANSchool of Materials Science Engineering Harbin Institute of Technology Harbin ChinaSchool of Materials Science Engineering Harbin Institute of Science Technology Harbin China |
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| Affiliation: | Xiufang WANG,Gaohui WU,Dongli SUN,Longtao JIANG and Yuanyuan HANSchool of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,ChinaSchool of Materials Science and Engineering,Harbin Institute of Science and Technology,Harbin 150001,China |
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| Abstract: | 2024 Al matrix composite reinforced by SiC particles with 45% volume fraction and 1 um diameter was successfully fabricated by squeeze-exhaust casting method. The aging behavior of SiCp/2024AI composite at four temperatures was investigated and compared to 2024 alloy. It was found that the addition of high volume fraction SiC particles does not alter the aging sequence, but it significantly accelerates the kinetics of precipitation in the composite matrices. Therefore, the aging peak of the composite appears earlier than that of 2024AI alloy. This is attributed to the decrease in the activation energy for the precipitate formation and the increase in the precipitate growth rate due to the high density dislocations in the composite with high volume fraction particles. The high density dislocations, as preferential nucleation sites for precipitates, bring about the tiny and dense precipitates in the composite. |
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| Keywords: | Squeeze-exhaust casting SiC particles Composite Aging behavior Activation energy |
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