| 高温下Al3Zr颗粒对Al-Cu-Li基合金的热变形行为以及加工图的影响(英文) |
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| 引用本文： | 杨庆波,邓燕君,杨谋,张志清,李卫国,刘庆. 高温下Al3Zr颗粒对Al-Cu-Li基合金的热变形行为以及加工图的影响(英文)[J]. 中国有色金属学会会刊, 2020, 30(4): 872-882. DOI: 10.1016/S1003-6326(20)65261-X |
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| 作者姓名： | 杨庆波 邓燕君 杨谋 张志清 李卫国 刘庆 |
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| 作者单位： | 1. 重庆大学材料科学与工程学院;2. 长安汽车工程研究总院;3. 中国西彭铝业工业园;4. 重庆大学重庆大学-辛辛那提大学联合学院;5. 重庆大学航空航天学院 |
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| 基金项目： | Project（11727802）supported by the National Natural Science Foundation of China；;Projects（2018CDJSK04XK09,106112017CDJQJ328840）supported by the Fundamental Research Funds for the Central Universities,China； |
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| 摘 要： | 采用等温平面压缩试验研究Al3Zr颗粒在不同温度(400500°C)以及应变速率(0.0110s-1)条件下对Al-Cu-Li基合金热压缩行为以及加工图的影响。通过金相观察(OM)、电子背散射衍射(EBSD)以及透射电镜(TEM)系统地表征不同变形条件下合金的显微组织。结果表明,在软化过程中相对于动态再结晶,动态回复起主导作用。在低温条件下,亚稳态Al3Zr颗粒能够有效抑制动态回复以及动态再结晶的长大。当温度达到500°C时,晶界附近的Al3Zr颗粒发生熔解,随Zr元素在晶界快速扩散,Al3Zr颗粒在晶界再次析出,并呈链状分布。这些链状分布的Al3Zr颗粒在热变形过程中导致宏观裂纹,在加工图中形成不安全区域(490500°C,0.01 s-1)。
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| 关 键 词： | Al-Cu-Li基合金 Al3Zr颗粒 热压缩 加工图 |
| 收稿时间： | 2019-06-11 |
Effect of Al3Zr particles on hot-compression behavior and processing map for Al-Cu-Li based alloys at elevated temperatures |
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| Affiliation: | 1. College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China;2. Chang''an Auto Global R&D Center, Chongqing 401120, China;3. China Xipeng Aluminum Industrial Park, Chongqing 401326, China;4. Chongqing University-University of Cincinnati Joint Co-op Institute, Chongqing University, Chongqing 401331, China;5. College of Aerospace Engineering, Chongqing University, Chongqing 400045, China;1. College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China;2. Institute for Structure and Function and Department of Physics, Chongqing University, Chongqing, 400044, China;1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;2. Aerospace Research Institute of Materials and Processing Technology, Beijing 100076, China;1. Research Institute of Light Alloy, Central South University, Changsha, 410083, China;2. State Key Laboratory of High Performance Complex Manufacturing, Changsha, 410083, China;3. School of Mechanical and Electrical Engineering, Central South University, Changsha, 410083, China;1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China;2. National Key Laboratory of Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin, 150001, China;3. Beijing Institute of Aeronautical Materials, Beijing, 100095, China |
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| Abstract: | The influence of Al3Zr particles on the hot compression behavior and processing map (PM) of Al-Cu-Li based alloys under isothermal plane-strain compression in the temperature range of 400-500 °C and at the strain rates of 0.01-10 s-1 was investigated. The corresponding microstructure was analyzed using optical microscopy (OM), electron back-scattered diffraction (EBSD) and transmission electron microscope (TEM). The results showed that dynamic recovery (DRV) played a greater role than dynamic recrystallization (DRX) in dynamic softening. At low temperatures, the Al3Zr particles were the significant barriers to inhibit DRV and DRX grain growth. When the temperature reached 500 °C, the Al3Zr particles readily spread along grain boundaries just like a necklace due to the dissolution of Al3Zr particles and rapid diffusion of Zr through grain boundary, resulting in generating the macroscopic cracks and forming an instability domain at 490-500 °C, 0.01 s-1 in the PM. |
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| Keywords: | Al-Cu-Li based alloy hot compression processing map |
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