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Research on the local formability of Al-Mg-Si alloy sheet during rapid hot gas forming

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Abstract

The formation of local features in complex-shaped components is very difficult during rapid hot gas forming. To characterize the local formability of an Al-Mg-Si alloy sheet, free-bulging test and corner-filling test at different temperatures and pressurizing conditions were conducted in this study. The effects of temperature (400 ~ 500 °C) and strain rate (0.1 ~ 10 s-1) on the local formability were analyzed in detail. The local formability was reflected by the ultimate bulging ability and corner filling ability. The reason for local filling behavior was revealed from the theoretical point of view. The sheet had good bulging formability at elevated temperatures and high strain rates. The ultimate bulging ability was almost similar to the decreasing diameter of bugling die. The ultimate strain could reach 0.78 when the temperature was 500 °C, the strain rate was 1.5 s-1, and the diameter of the bugling die was 10 mm. The filling ability increased as the temperature and pressure increased. A corner radius of 2.50 mm was obtained within 1 s when the temperature was 500 °C and the pressurizing rate was 10 MPa/s. In practice, complex-shaped components with local features could be formed within several seconds by hot gas forming.

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Funding

This study was financially supported by the National Natural Science Foundation of China (51705102), the National Key Research and Development Program of China (2017YFB0306304), and the Natural Science Foundation of Heilongjiang Province (QC2018061). The authors would like to take this opportunity to express their sincere appreciation to the fund.

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Authors and Affiliations

  1. School of Mechanical Engineering, Dalian University of Technology, Dalian, 116023, China

    Xiaobo Fan, Yanli Lin & Zhubin He

  2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China

    Xianshuo Chen

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  1. Xiaobo Fan
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  2. Xianshuo Chen
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  3. Yanli Lin
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  4. Zhubin He
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Correspondence to Xiaobo Fan.

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Fan, X., Chen, X., Lin, Y. et al. Research on the local formability of Al-Mg-Si alloy sheet during rapid hot gas forming. Int J Adv Manuf Technol 108, 1839–1848 (2020). https://doi.org/10.1007/s00170-020-05478-5

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  • DOI: https://doi.org/10.1007/s00170-020-05478-5

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