| Aging behavior of Al2O3 short fiber reinforced Al-Cu alloy composites |
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| 引用本文： | 耿林 许虹宇 余快 王洪林. Aging behavior of Al2O3 short fiber reinforced Al-Cu alloy composites[J]. 中国有色金属学会会刊, 2007, 17(5): 1018-1021. DOI: 10.1016/S1003-6326(07)60218-0 |
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| 作者姓名： | 耿林 许虹宇 余快 王洪林 |
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| 作者单位： | School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | Al2O3 short fiber reinforced AI-Cu composites containing 1%, 3%, 5% and 7% Cu were fabricated by a squeeze casting technique. The as-cast Al2O3/Al-Cu composites were solution treated at 535 ℃ and then aged at 170, 190 and 210 ℃, respectively. Age hardening behavior of the Al2O3/Al-Cu composites was analyzed by measuring the hardness of the samples at different aging temperatures and aging time. Microstructures of the composites were observed by transmission electron microscope（TEM）. The results indicate that the hardness of the Al2O3/Al-Cu composites containing 7% Cu is much higher than that containing 1%-5% Cu because of the large amount of CuAl2 precipitant in the Al2O3/Al-Cu composite. With the increase of Cu content from 1% to 7%, the time needed for the appearance of peak hardness shortened, indicating that the addition of Cu can accelerate the kinetic of CuAl2 precipitation in the Al2O3/Al-Cu composites. The Al2O3/Al-Cu composite containing 7% Cu shows the highest increment of hardness by aging treatment. Therefore, in order to get a higher peak hardness, the Al2O3/Al-Cu composites need more Cu addition as compared with the un-reinforced Al-Cu alloys.
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| 关 键 词： | Al-Cu复合物 Al2O3短纤维 合金 老化现象 |
| 收稿时间： | 2007-02-27 |
| 修稿时间： | 2007-02-27 |
Aging behavior of Al2O3 short fiber reinforced Al-Cu alloy composites |
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| GENG Lin,XU Hong-yu,YU Kuai,WANG Hong-lin. Aging behavior of Al2O3 short fiber reinforced Al-Cu alloy composites[J]. Transactions of Nonferrous Metals Society of China, 2007, 17(5): 1018-1021. DOI: 10.1016/S1003-6326(07)60218-0 |
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| Authors: | GENG Lin XU Hong-yu YU Kuai WANG Hong-lin |
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| Affiliation: | School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | Al2O3 short fiber reinforced Al-Cu composites containing 1%, 3%, 5% and 7% Cu were fabricated by a squeeze casting technique. The as-cast Al2O3/Al-Cu composites were solution treated at 535 °C and then aged at 170, 190 and 210 °C, respectively. Age hardening behavior of the Al2O3/Al-Cu composites was analyzed by measuring the hardness of the samples at different aging temperatures and aging time. Microstructures of the composites were observed by transmission electron microscope(TEM). The results indicate that the hardness of the Al2O3/Al-Cu composites containing 7% Cu is much higher than that containing 1%-5% Cu because of the large amount of CuAl2 precipitant in the Al2O3/Al-Cu composite. With the increase of Cu content from 1% to 7%, the time needed for the appearance of peak hardness shortened, indicating that the addition of Cu can accelerate the kinetic of CuAl2 precipitation in the Al2O3/Al-Cu composites. The Al2O3/Al-Cu composite containing 7% Cu shows the highest increment of hardness by aging treatment. Therefore, in order to get a higher peak hardness, the Al2O3/Al-Cu composites need more Cu addition as compared with the un-reinforced Al-Cu alloys. |
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| Keywords: | Al-Cu composites Al2O3 short fiber aging hardness |
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