| 直流电对7B04铝合金固溶与时效组织和性能的影响 |
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| 引用本文： | 何立子,魏满想,宁庆波,王新宇,崔建忠.直流电对7B04铝合金固溶与时效组织和性能的影响[J].稀有金属材料与工程,2020,49(6):1957-1962. |
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| 作者姓名： | 何立子 魏满想 宁庆波 王新宇 崔建忠 |
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| 作者单位： | 东北大学材料电磁过程研究教育部重点实验室,东北大学材料电磁过程研究教育部重点实验室,东北大学材料电磁过程研究教育部重点实验室,东北大学材料电磁过程研究教育部重点实验室,东北大学材料电磁过程研究教育部重点实验室 |
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| 基金项目： | National Natural Science Foundation of China (No. 51574076) |
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| 摘 要： | 本文采用拉伸试验、扫描电子显微镜(SEM)和透射电子显微镜(TEM)等手段,研究了7B04铝合金在施加和不施加直流电条件下,经470℃固溶和100-140℃时效处理后的组织和力学性能。与传统的T6处理(470 oC/30 min+120 oC/24h)相比,固溶和/或时效处理时施加500A的电流,可显著提高GPII区的析出密度,进而提高峰时效状态下的拉伸强度和延伸率。固溶过程中施加直流电可将随后时效合金达到峰值强度的时间明显缩短12h。
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| 关 键 词： | 7B04合金 人工时效 直流电 组织 性能 |
| 收稿时间： | 2019/3/19 0:00:00 |
| 修稿时间： | 2019/5/29 0:00:00 |
Effects of direct current on the microstructures and properties of 7B04 aluminum alloy during solid solution and artificial ageing |
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| Li-zi He,Man-xiang Wei,Qing-bo Ning,Xin-yu Wang and Jian-zhong Cui.Effects of direct current on the microstructures and properties of 7B04 aluminum alloy during solid solution and artificial ageing[J].Rare Metal Materials and Engineering,2020,49(6):1957-1962. |
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| Authors: | Li-zi He Man-xiang Wei Qing-bo Ning Xin-yu Wang and Jian-zhong Cui |
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| Affiliation: | Key Lab of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University,Key Lab of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University,Key Lab of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University,Key Lab of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University,Key Lab of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University |
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| Abstract: | The microstructures and mechanical properties of 7B04 aluminum alloy solid solution at 470oC and aged at 100-140 oC without and with electric current were investigated by tensile test, scanning electron microscope (SEM) and transmission electron microscope (TEM). Compared with the traditional T6 treatment (470 oC/30min+120 oC/24h), applying electric current of 500A during solid solution and/or ageing treatment can increase both the tensile strengths and elongation at the age-peak state, due to the significant increase of the precipitation density of Guinier- Preston II (GPII) zones. Applying electric current during solid solution can significantly reduce the time to the peak strength by 12h in the subsequent ageing alloy |
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| Keywords: | 7B04 alloy artificial ageing electric current microstructures properties |
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