Skip to main content
SpringerLink
Log in

Effect of Changing Strain Paths on Forming Limit Diagrams of AI 2008-T4

  • Published:
Metallurgical Transactions A Aims and scope Submit manuscript

Abstract

The effect of changing strain paths on forming limits of aluminum alloy 2008-T4 has been investigated by determining forming limit diagrams (FLDs) after prestraining. Sheets were pre- strained to several levels in uniaxial, biaxial, and plane-strain tension parallel and perpendicular to the prior rolling direction (RD). Abrupt changes in the strain path can be used to increase the forming limits. Prestraining in biaxial tension generally lowers the forming limits for the entire FLD, whereas prestraining in uniaxial tension raises the limits on the right-hand side of the FLD without much effect on the left-hand side. Prestraining in plane-strain tension raises both sides away from the minimum. Finally, it was found that after prestraining, the amount of the additional plane-strain deformation possible depends on the effective strain during prestrain.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. S.P. Keeler:Sheet Met. Ind., 1965, pp. 683-91.

  2. S.S. Hecken:Sheet Met. Ind., 1975, vol. 52, pp. 671–75.

    Google Scholar 

  3. A.K. Ghosh and S.S. Hecker:Metall. Trans., 1974, vol. 5, pp. 2161–64.

    Article  CAS  Google Scholar 

  4. K.S. Raghavan: “A Simple Technique to Determine In-Plane Forming Limit Curves,” Presentation at the 1992 NADDRG Spring Meeting, Dearborn, MI, April 28-30, 1992.

  5. A. Graf and W.F. Hosford:Metall. Trans. A, 1993, vol. 24A, pp. 2497–2501.

    Article  CAS  Google Scholar 

  6. W. Muschenborn and H.M. Sonne:Arch. Eisenhüttenwes., 1975, vol. 46, pp. 597–602.

    Article  Google Scholar 

  7. J.V. Laukonis and A.K. Ghosh:Metall. Trans. A, 1978, vol. 9A, pp. 1849–56.

    Article  CAS  Google Scholar 

  8. A.J. Ranta-Escola:Mater. Technol., 1980, pp. 45-49.

  9. J.H. Schmitt, J. Raphael, E. Rauch, and P. Martin:Computational Methods for Predicting Material Processing Defects, Elsevier, New York, NY, 1987, pp. 309–18.

    Book  Google Scholar 

  10. H.M. Shang, G.S. Tan, and W.C.M. Tan:J. Eng. Mater. Technol. (Trans.-ASME), 1985, vol. 107, pp. 298–306.

    Article  Google Scholar 

  11. M. Zandrahimi, S. Platias, D. Price, D. Barrett, P.S. Bate, W.T. Roberts, and D.V. Wilson:Metall. Trans. A, 1989, vol. 20A, pp. 2471–82.

    Article  CAS  Google Scholar 

  12. H. Sang and D.J. Lloyd:Metall. Trans. A, 1979, vol. 10A, pp. 1767–72.

    Google Scholar 

  13. Tensile Testing, P. Han, ed., ASM INTERNATIONAL, Metals Park, OH, 1992, p. 17.

    Google Scholar 

  14. S.S. Hecker:7th Biennial Congress of the 1DDRG, 1972, paper 5C.

  15. J.V. Laukonis:Metall. Trans. A, 1981, vol. 12A, pp. 467–72.

    Article  Google Scholar 

  16. Z. Marciniak and J. Duncan:Mechanics of Sheet Metal Forming, Edward Arnold, London, 1992, pp. 132–33.

    Google Scholar 

  17. R.H. Wagoner:Metall. Trans. A, 1980, vol. 11 A, pp. 165–75.

    Article  Google Scholar 

  18. R.H. Wagoner and N.M. Wang:Int. J. Mech. Sci., 1979, vol. 21, pp. 255–64.

    Article  Google Scholar 

  19. A. Graf and W.F. Hosford:Sheet Metal and Stamping Symp., SAE, Warrendale PA, 1993, pp. 269–72.

    Google Scholar 

  20. Z. Marciniak and K. Kuczynski:Int. J. Mech. Sci., 1967, vol. 9, pp. 609–20.

    Article  Google Scholar 

  21. W.F. Hosford:Proc. 7th NAMRC, Dearborn, MI, May 1979, pp. 191–96.

  22. R. Hill:Proc. R. Soc. London, 1948, vol. 193A, p. 281.

    Google Scholar 

  23. C. Vial and W.F. Hosford:Int. J. Mech. Sci., 1981, vol. 25, pp. 899–915.

    Article  Google Scholar 

  24. N. Takakura, K. Yamaguchi, and M. Fukuda:JSME Int. J., 1987, vol. 30, pp. 2034–39.

    Article  Google Scholar 

  25. R. Hill:The Mathematical Theory of Plasticity, Oxford University Press, London, 1950, p. 322.

    Google Scholar 

  26. D.V. Wilson:Acta Metall., 1965, vol. 13, pp 807–14.

    Article  CAS  Google Scholar 

  27. J.E. Bird and J.L. Duncan:Metall. Trans. A, 1981, vol. 12A, pp. 235–41.

    Article  Google Scholar 

  28. G. LeRoy and J.D. Embury: inFormability: Analysis, Modeling and Experimentation, A.K. Ghosh, H.L. Gegel, and S.S. Hecker, eds., ASM INTERNATIONAL, Metals Park, OH, 1977, pp. 183–207.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Automated Analysis Corp., 48104-6767, Ann Arbor, MI

    Alejandro Graf

  2. Department of Materials Science and Engineering, University of Michigan, 48109-2136, Ann Arbor, MI

    William Hosford (Professor)

Authors
  1. Alejandro Graf
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. William Hosford
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Graf, A., Hosford, W. Effect of Changing Strain Paths on Forming Limit Diagrams of AI 2008-T4. Metall Trans A 24, 2503–2512 (1993). https://doi.org/10.1007/BF02646529

Download citation

  • Received:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02646529

Keywords

Search

Navigation