| 7055铝合金中低比例动态再结晶的模拟 |
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| 引用本文： | 李佳宸,吴晓东,廖斌,蔺晓敏,曹玲飞. 7055铝合金中低比例动态再结晶的模拟[J]. 中国有色金属学会会刊, 2021, 31(7): 1902-1915. DOI: 10.1016/S1003-6326(21)65625-X |
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| 作者姓名： | 李佳宸 吴晓东 廖斌 蔺晓敏 曹玲飞 |
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| 摘 要： | 研究7055铝合金在温度为390～470℃ 和应变速率为0.01～1 s-1条件下热变形和动态再结晶行为.电子背散射衍射(EBSD)表征结果表明,7055铝合金在热变形下动态再结晶含量较低,动态再结晶含量为1％～13％.为了模拟低比例动态再结晶问题,对JMAK动态再结晶模型进行修正.应用修正的模型,结合商业有限元软件D...
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| 关 键 词： | 动态再结晶 JMAK模型 DEFORM-3D 7055铝合金 热压缩 |
| 收稿时间： | 2020-07-18 |
Simulation of low proportion of dynamic recrystallization in 7055 aluminum alloy |
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| Affiliation: | 1. International Joint Laboratory for Light Alloys (Ministry of Education), College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;2. Alnan Aluminium Co., Ltd., Nanning 530031, China;3. Shenyang National Laboratory for Materials Science, Chongqing University, Chongqing 400044, China |
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| Abstract: | The hot deformation and dynamic recrystallization (DRX) behaviors of 7055 aluminum alloy were studied at temperatures of 390−470 °C and strain rates of 0.01−1 s−1. A low DRX fraction between 1% and 13% was observed by using EBSD technique. A modified JMAK-type DRX model was proposed for such low DRX fraction problems. The model was used together with commercial FEM software DEFORM-3D to simulate the hot compression of 7055 aluminum alloy. There was a good agreement between experimental and predicted DRX fractions and grain size with an average absolute relative error (AARE) of 13.7% and 6.3%, respectively. In order to further verify the validity of the proposed model, the model was also used to simulate DRX in industrial hot rolling of 7055 aluminum alloys. The results showed that the distribution of DRX fraction was inhomogeneous, and agreed with experimental observations. |
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| Keywords: | dynamic recrystallization JMAK model DEFORM-3D 7055 aluminum alloy hot compression |
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