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Time-dependent Springback

  • Symposium MS03: Sheet metal forming
  • Published:
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ABSTRACT

Draw-bend tests performed some years ago on four aluminum alloys (2008-T4, 5182-O, 6022-T4, and 6111-T4) revealed that specimens can continue to change shape for long periods, up to 15 months, following forming and unloading [1]. Contemporaneous tests of autobody steels (DQSK, AKDQ and HSLA steels) tested under identical conditions showed no such time-dependent springback over a 7 year period [2]. Current, preliminary results for a few advanced high strength steels (DP600, DP800, DP980 and TRIP780) revealed time-dependent springback at room temperature; the sign of the springback reversing for certain combinations of process conditions. Time-dependent behavior of four advanced high strength steel was measured and creep-simulated for various test conditions. Comparisons show qualitative agreement, but the simulations over-predict the magnitude of the effect

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REFERENCES

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Authors and Affiliations

  1. Department of Materials Science and Engineering, The Ohio State University, 2041 College Rd., Columbus, OH, 43210, USA

    H. Lim, J. H. Sung & R. H. Wagoner

  2. Korean Institute of Machinery and Materials, 66 Sangnam-dong, Changwon-city, Kyeongnam, 641–010, South Korea

    M. G. Lee

Authors
  1. H. Lim
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  2. M. G. Lee
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  3. J. H. Sung
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  4. R. H. Wagoner
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Correspondence to H. Lim.

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Lim, H., Lee, M.G., Sung, J.H. et al. Time-dependent Springback. Int J Mater Form 1 (Suppl 1), 157–160 (2008). https://doi.org/10.1007/s12289-008-0015-2

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  • DOI: https://doi.org/10.1007/s12289-008-0015-2

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