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Thermo-Mechanical Coupled Analysis of Hot Press Forming with 22MnB5 Steel

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Abstract

This paper mainly concerns the thermo-mechanical analysis to evaluate the process parameters in the hot press forming with the 22MnB5 sheet such as the austenitization temperature, transport and quenching time for enhancing the efficiency in the production cycle. It is noted that the transport time is most influencing process parameter in the hot press forming to increase production efficiency without sacrificing the strength of the final product. In addition, we newly proposed a scheme to reproduce the flow curves of the hot stamped 22MnB5 sheet with respect to the martensite fraction by correlating the numerical analyses and tensile test results. To take into consideration of the strength variation in the hot stamped door impact beam, entire part is partitioned into several domains on which adaptive flow curves are assigned with respect to the martensite fraction. It demonstrates a good agreement with experimental 3-point bending test with the hot stamped door impact beam when applying the proposed method adopting adaptive flow curves with respect to the martensite fraction.

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Acknowledgement

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (2016R1C1B1006875). This work was also supported by the “Human Resources Program in Energy Technology” of the Korean Institute of Energy Technology Evaluation and Planning (KETEP), granted by the Ministry of Trade, Industry & Energy, Republic of Korea (no. 20174010201310).

The authors declare that they have no conflicts of interest.

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Author notes

  1. These authors contributed equally to this work.

Authors and Affiliations

  1. Department of Mechanical Design Engineering, Hanyang University, Seoul, 04763, Korea

    Hyung-gyu Kim, Chanhee Won & Seungho Choi

  2. Research and Department, GNS Ltd., 19 Beomjigi-ro, Danwon-gu, Ansan-si, Gyeonggi, 15597, Korea

    Moon-gyu Gong & Joon-gyu Park

  3. Research and Department, LG Electronics, 222 Lg-ro, Jinwi-myeon, Pyeongtack-si, Gyeonggi, 17709, Korea

    Heejong Lee

  4. Department of Mechanical Engineering, Hanyang University, Gyeonggi, 15588, Korea

    Jonghun Yoon

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  1. Hyung-gyu Kim
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  2. Chanhee Won
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  3. Seungho Choi
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Correspondence to Jonghun Yoon.

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Kim, Hg., Won, C., Choi, S. et al. Thermo-Mechanical Coupled Analysis of Hot Press Forming with 22MnB5 Steel. Int.J Automot. Technol. 20, 813–825 (2019). https://doi.org/10.1007/s12239-019-0076-x

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  • DOI: https://doi.org/10.1007/s12239-019-0076-x

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