| Effects of Ag addition on the microstructures and properties of Al-Mg-Si-Cu alloys |
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| 作者姓名： | Li-zi He Yi-heng Cao Yi-zhou Zhou Jian-zhong Cui |
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| 作者单位： | Key Lab of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, China |
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| 基金项目： | This work was financially supported by the National Natural Science Foundation of China |
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| 摘 要： | Effects of Ag addition on the microstructures, aging characteristics, tensile properties, electrochemical properties, and intergranular corrosion (IGC) properties of Al-1.1Mg-0.8Si-0.9Cu-0.35Mn-0.02Ti alloy were investigated using scanning electronic microscopy and transmission electronic microscopy. The aging process of Al-Mg-Si-Cu alloys was accelerated by the addition of Ag. The strength of peak-aged Al-Mg-Si-Cu alloys was enhanced by Ag addition because of the high density of β"- and L-phase age-hardening precipitates. The corrosion performance of the Al-Mg-Si-Cu alloy is closely related to the aging conditions and is independent of the Ag content. The IGC susceptibility is serious in the peak-aged alloy because of the continuous distribution of Cu-rich Q-phase precipitates along grain boundaries. Ag addition reduces the size of the grain-boundary-precipitate Q phase and the width of the precipitate-free zone and thus results in decreased IGC susceptibility of Al-Mg-Si-Cu alloys.
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| 关 键 词： | Al-Mg-Si-Cu alloys silver addition aging tensile properties corrosion properties microstructures |
Effects of Ag addition on the microstructures and properties of Al–Mg–Si–Cu alloys |
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| Li-zi He,Yi-heng Cao,Yi-zhou Zhou,Jian-zhong Cui.Effects of Ag addition on the microstructures and properties of Al-Mg-Si-Cu alloys[J].International Journal of Minerals,Metallurgy and Materials,2018,25(1):62-72. |
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| Authors: | Li-zi He Yi-heng Cao Yi-zhou Zhou Jian-zhong Cui |
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| Affiliation: | 1.Key Lab of Electromagnetic Processing of Materials, Ministry of Education,Northeastern University,Shenyang,China;2.School of Materials Science and Engineering,Northeastern University,Shenyang,China;3.Institute of Metal Research,Chinese Academy of Sciences,Shenyang,China |
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| Abstract: | Effects of Ag addition on the microstructures, aging characteristics, tensile properties, electrochemical properties, and intergranu-lar corrosion (IGC) properties of Al-1.1Mg-0.8Si-0.9Cu-0.35Mn-0.02Ti alloy were investigated using scanning electronic microscopy and transmission electronic microscopy. The aging process of Al-Mg-Si-Cu alloys was accelerated by the addition of Ag. The strength of peak-aged Al-Mg-Si-Cu alloys was enhanced by Ag addition because of the high density ofβ″- and L-phase age-hardening precipitates. The corrosion performance of the Al-Mg-Si-Cu alloy is closely related to the aging conditions and is independent of the Ag content. The IGC susceptibility is serious in the peak-aged alloy because of the continuous distribution of Cu-rich Q-phase precipitates along grain boun-daries. Ag addition reduces the size of the grain-boundary-precipitate Q phase and the width of the precipitate-free zone and thus results in decreased IGC susceptibility of Al-Mg-Si-Cu alloys. |
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