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Effect of Minor Er on the Microstructure and Properties of Al-6.0Mg-0.4Mn-0.1Cr-0.1Zr Alloys

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Abstract

As-cast Al-6.0Mg-0.4Mn-0.1Cr-0.1Zr alloys containing different additions of Er were prepared. Then, the specimens were carried out homogenization heat treatment, hot rolling, cold rolling, and annealing. The effects of minor Er on the microstructure and properties of Al-6.0Mg-0.4Mn-0.1Cr-0.1Zr alloy were investigated. Results show that addition of Er can refine the microstructure and improve the mechanical properties of the alloys. As for the annealed alloys, the addition of 0.33%Er can increase the tensile strength by 29 MPa. Strength increment is mainly attributed to refinement and the precipitation of Al3Er and Al3(Er, Zr). Additionally, the minor Er can improve the corrosion resistance of the alloys, which can be attributed to the compact composite oxide film of Er-O and Al-O, purification, and modification.

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Acknowledgments

This paper was supported by National Natural Science Foundation (51671063, 51771060), Heilongjian Province Natural Science Foundation (ZD2017010), the Fundamental Research Funds for the Central Universities (HEUCFG201834), Harbin City Application Technology Research and Development Project (2015AE4AE005, 2015RQXXJ001, 2016AB2AG013), and Key Laboratory of Lightweight and High Strength Structural Materials of Jiangxi Province (No. 2017BCD40003).

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Authors and Affiliations

  1. College of Shipbuilding Engineering, Harbin Engineering University, Harbin, 150001, People’s Republic of China

    Hailong Chen

  2. Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin, 150001, People’s Republic of China

    Tianfu Yu, Zhongyuan Qi, Ruizhi Wu, Legan Hou, Jinghuai Zhang & Milin Zhang

  3. College of Science, Heihe University, Heihe, 164300, People’s Republic of China

    Ruizhi Wu & Milin Zhang

  4. Key Laboratory of Lightweight and High Strength Structural Materials of Jiangxi Province, Nanchang University, Nanchang, 330031, People’s Republic of China

    Ruizhi Wu

  5. Northeast Light Alloy Co., Ltd, Harbin, 150060, People’s Republic of China

    Guojun Wang, Xinyu Lv & Fuguan Cong

  6. Suzhou Changfeng Avionics Co., LTD., Suzhou, 215151, People’s Republic of China

    Zhongyuan Qi

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  1. Hailong Chen
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Correspondence to Ruizhi Wu.

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Chen, H., Yu, T., Qi, Z. et al. Effect of Minor Er on the Microstructure and Properties of Al-6.0Mg-0.4Mn-0.1Cr-0.1Zr Alloys. J. of Materi Eng and Perform 27, 5709–5717 (2018). https://doi.org/10.1007/s11665-018-3678-y

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  • DOI: https://doi.org/10.1007/s11665-018-3678-y

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