| Mechanical Properties and Microstructure of In Situ TiB_2-7055 Composites |
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| 引用本文： | CHEN dong,LE Yong-kang,BAI Liang,MA Nai-heng,LI Xian-feng,WANG Hao-wei* The State Key laboratory of Metal Matrix Composites,Shanghai JiaoTong University,Shanghai 200030,China. Mechanical Properties and Microstructure of In Situ TiB_2-7055 Composites[J]. 中国航空学报, 2006, 19(Z1) |
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| 作者姓名： | CHEN dong LE Yong-kang BAI Liang MA Nai-heng LI Xian-feng WANG Hao-wei* The State Key laboratory of Metal Matrix Composites Shanghai JiaoTong University Shanghai 200030 China |
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| 作者单位： | CHEN dong，LE Yong-kang，BAI Liang，MA Nai-heng，LI Xian-feng，WANG Hao-wei* The State Key laboratory of Metal Matrix Composites，Shanghai JiaoTong University，Shanghai 200030，China |
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| 摘 要： | In order to fabricate a kind of high strength particulate reinforced aluminum-matrix composites, the high strength aluminum alloy 7055 was selected as a matrix. Composites reinforced with varying amounts of TiB2 particles were synthesized using the in situ method, and their mechanical properties and microstructure were analyzed. It is found that the in situ TiB2 particles sized from 50 to 400 nm uniformly disperse in the matrix. With the weight fraction of TiB2 particles increasing, the elastic modulus as well as the yield strength and the ultimate tensile strength increase, while the ductility decrease. The improvement of strength could be attributed to good bonding between TiB2 and the matrix, and also the TiB2 particles act as a barrier to dislocation.
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Mechanical Properties and Microstructure of In Situ TiB2-7055 Composites |
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| CHEN dong,LE Yong-kang,BAI Liang,MA Nai-heng,LI Xian-feng,WANG Hao-wei. Mechanical Properties and Microstructure of In Situ TiB2-7055 Composites[J]. Chinese Journal of Aeronautics, 2006, 19(Z1) |
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| Authors: | CHEN dong LE Yong-kang BAI Liang MA Nai-heng LI Xian-feng WANG Hao-wei |
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| Abstract: | In order to fabricate a kind of high strength particulate reinforced aluminum-matrix composites, the high strength aluminum alloy 7055 was selected as a matrix. Composites reinforced with varying amounts of TiB2 particles were synthesized using the in situ method, and their mechanical properties and microstructure were analyzed. It is found that the in situ TiB2 particles sized from 50 to 400 nm uniformly disperse in the matrix. With the weight fraction of TiB2 particles increasing, the elastic modulus as well as the yield strength and the ultimate tensile strength increase, while the ductility decrease. The improvement of strength could be attributed to good bonding between TiB2 and the matrix, and also the TiB2 particles act as a barrier to dislocation. |
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| Keywords: | metal matrix composite in situ mechanical properties microstructure |
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