Advertisement

Metallurgical and Materials Transactions A

, Volume 37, Issue 2, pp 399–404 | Cite as

Prediction of bending limits in friction-stir-processed thick plate aluminum

  • M. P. Miles
  • M. W. Mahoney
  • C. B. Fuller
Article

Abstract

Friction-stir processing (FSP) was used to modify surface microstructures, to enhance the bending of thick-plate 6061-T6 and 7050-T7451 aluminum alloys. Plates were bent at room temperature into a V-shaped die, to various angles. Bending performance in the friction-stir-processed plates was significantly better than that in the base plates, where processing caused localized softening of the pretensile surface of the plate. A finite-element model of the plate-bending process was developed, to predict the bending limits of both the unprocessed base plates and of the friction-stir-processed plates. For the friction-stir-processed plates, the model employed a mesh divided into two or more zones; one zone was for unprocessed base material and other zones were for the processed material or for material that was affected by the heat of processing. The model used both the von Mises and the Latham and Cockroft criteria to predict bending limits. The bending-limit predictions were reasonably accurate, provided the gradient in true stress-strain behavior through the plate thickness was well characterized.

Keywords

Material Transaction Friction Stir Weld Bend Angle Processing Depth Thick Aluminum Plate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    S.P. Lynch, D.P. Edwards, A. Majumdar, S. Moutsos, and M.W. Mahoney: Mater. Sci. Forum, 2003, vols. 426–432, pp. 2903–08.Google Scholar
  2. 2.
    M. Mahoney, A.J. Barnes, W.H. Bingel, and C. Fuller: Mater. Sci. Forum, 2004, vol. 447–448, pp. 505–12.Google Scholar
  3. 3.
    M.W. Mahoney, W.H. Bingel, S.R. Sharma, and R.S. Mishra: Mater. Sci. Forum, 2003, vols. 426–432, pp. 2843–48.Google Scholar
  4. 4.
    Z.Y. Ma, R. Mishra, and M. Mahoney: Scripta Mater., 2004, vol. 50 (7), pp. 931–35.CrossRefGoogle Scholar
  5. 5.
    C. Fuller, M. Mahoney, and W. Bingel: Proc. 4th Int. Symp. Friction Stir Welding, Park City, UT, May 2003, TWI Ltd., Cambridge, United Kingdom, 2003.Google Scholar
  6. 6.
    M. Mahoney, R. Mishra, T. Nelson, J. Flintoff, R. Islamgaliev, and Y. Hovansky: Friction Stir Welding and Processing, TMS, Warrendale, PA, 2001, pp. 183–94.Google Scholar
  7. 7.
    Z.Y. Ma, R.S. Mishra, M.W. Mahoney, and R. Grimes: Mater. Sci. Eng., 2003, vol. A351, p. 148.Google Scholar
  8. 8.
    C. Fuller, M. Mahoney, and W. Bingel: Proc. 5th Int. Symp. on Friction Stir Welding, Metz, France, Sept. 2004, TWI Ltd., Cambridge, United Kingdom, 2004.Google Scholar
  9. 9.
    Z.Y Ma, S.R. Sharma, R.S. Mishra, and M.W. Mahoney: Mater. Sci. Forum, 2003, vols. 426–432, pp. 2891–96.CrossRefGoogle Scholar
  10. 10.
    M. Mahoney, C.B. Fuller, and W.H. Bingel: Rockwell Scientific Co., Thousand Oaks, CA, unpublished research, 2002.Google Scholar
  11. 11.
    Z. Feng, J.E. Gould, and T.J. Lienert: Hot Deformation of Aluminum Alloys II, 1998, pp. 149–58.Google Scholar
  12. 12.
    Y.J. Chao, X. Qi, and W. Tang: J. Manufacturing Sci. Eng., 2003, vol. 125 (1), pp. 138–45.CrossRefGoogle Scholar
  13. 13.
    M. Song and R. Kovacevic: Int. J. Mach. Tools Manufacture, 2003, vol. 43, pp. 605–15.CrossRefGoogle Scholar
  14. 14.
    C.M. Chen and R. Kovacevic: Int. J. Mach. Tools Manufacture, 2003, vol. 43, pp. 1319–26.CrossRefGoogle Scholar
  15. 15.
    S. Xu, X. Deng, A.P. Reynolds, and T.U. Seidel: Sci. Technol. Welding Joining, 2001, vol. 6, pp. 191–93.CrossRefGoogle Scholar
  16. 16.
    P.A. Colegrove and H.R. Shercliff: Sci. Technol. Welding Joining. 2003, vol. 8, pp. 360–68.CrossRefGoogle Scholar
  17. 17.
    A. Askari, S. Silling, B. London, and M. Mahoney: Modeling and Analysis of Friction Stir Welding Processes, TMS, Warrendale, PA, 2001.Google Scholar
  18. 18.
    M. Miles, M. Mahoney, T. Nelson, and R. Mishra: Friction Stir Welding and Processing II, TMS, Warrendale, PA, 2003, pp. 253–58.Google Scholar
  19. 19.
    FORGE2, Transvalor SA, Sophia-Antipolis, France.Google Scholar
  20. 20.
    C.D. Donne, G. Biallas, T. Ghinidini, and G. Raimbeaux: Proc. 2nd Int. Symp. on Friction Stir Welding, Gothenburg, Sweden, June 26–28, 2000.Google Scholar
  21. 21.
    M.A. Sutton, A.P. Reynolds, D.Q. Wang, and C.R. Hubbard: J. Eng. Mater. Technol., 2002, vol. 124 (4), pp. 215–21.CrossRefGoogle Scholar
  22. 22.
    M.G. Cockroft and D.J. Latham: J. Inst. Met., 1968, vol. 96, pp. 33–39.Google Scholar
  23. 23.
    D.A. Barlow: J. Mech. Phys. Solids, 1954, vol. 2, pp. 259–64.CrossRefGoogle Scholar

Copyright information

© ASM International & TMS-The Minerals, Metals and Materials Society 2006

Authors and Affiliations

  • M. P. Miles
    • 1
  • M. W. Mahoney
    • 2
  • C. B. Fuller
    • 2
  1. 1.the Manufacturing Engineering Technology DepartmentBrigham Young UniversityUSA
  2. 2.Rockwell Scientific CompanyUSA

Personalised recommendations