Skip to main content

Fatigue Crack Growth of Peened Friction Stir-Welded 7075 Aluminum Alloy under Different Load Ratios

Journal of Materials Engineering and Performance volume 19, pages 99–106 (2010)Cite this article

Abstract

The effect of peening on the fatigue crack growth performance of friction stir-welded 7075 aluminum alloy was investigated. The fatigue crack growth rates were assessed for laser- and shot-peening conditions at stress ratios (R) of 0.1 and 0.7. The surface and through thickness residual stress distributions were characterized for the different regions in the weld. The results indicate a significant reduction in fatigue crack growth rates using laser peening compared to shot peening and the as-welded condition. The effect of the compressive stresses obtained through laser peening was deemed responsible for increasing the resistance to fatigue crack growth of the welds.

This is a preview of subscription content, access via your institution.

Access options

Buy single article

Instant access to the full article PDF.

USD 39.95

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

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12
Fig. 13
Fig. 14
Fig. 15

References

  1. Pao P., Gill, S. Feng C., Sankaran, K. Corrosion-Fatigue Crack Growth in Friction Stir Welded Al 7075. Scripta Materialia 45 (2001) 605-612

    Article  CAS  Google Scholar 

  2. Rhodes C., Mahoney M, Bingel W, Spurling R, Bampton W. Effects of Friction Stir Welding on Microstructure of 7075 Aluminum. Scripta Materialia 1997, Vol. 36, No. 1, pp 69-75.

    Article  CAS  Google Scholar 

  3. W.M. Thomas, E.D. Nicholas, J.C. Needham, M.G. Murch, P. Templesmith, and C.J. Dawes, Friction Stir Butt Welding, Int Patent App PCT/GB92/02203, and GB Patent App 9125978.8, 297 US patent No. 5,460,317, October 1995

  4. Staron, P.; Kocak, M.; Williams, S.; Wescott, A.. Residual stress in friction stir-welded A1 sheets. Physica B: Condensed Matter, v 350, n 1-3 SUPPL. 1, Jul 15, 2004, p e491-e493

    Article  CAS  ADS  Google Scholar 

  5. Ericsson M, Sandstrom R. Influence of Welding Speed on the Fatigue of Friction Stir Welds, and Comparison with MIG and TIG. International Journal of Fatigue 25 (2003) pp 1379-1387.

    Article  CAS  Google Scholar 

  6. Bussu G. Irving P.E. The role of residual stress and heat affected zone properties on fatigue crack propagation in friction stir welded 2024- T351 aluminum joints. Int J Fatigue; 2003. 25:77–88

    Article  CAS  Google Scholar 

  7. Hatamleh O, Lyons J, and Forman R. Laser and Shot Peening Effects on Fatigue Crack Growth in Friction Stir Welded 7075-T7351 Aluminum Alloy Joints. International Journal of Fatigue. Volume 29, Issue 3, March 2007, Pages 421-434.

    Article  CAS  Google Scholar 

  8. John, R et al. Residual stress effects on near-threshold fatigue crack growth in friction stir welds in aerospace alloys. Int J Fatigue 2003;25:939–48.

    Article  CAS  Google Scholar 

  9. Mahoney MW et al. Properties of friction-stir-welded7075 T651 aluminum. Metall Mater Trans A 1998;29:1955–64.

    Article  Google Scholar 

  10. J. Tyson, T. Schmidt, and K. Galanulis, Advanced Photogrammetry for Robust Deformation and Strain Measurement, Proceedings of SEM 2002 Annual Conference (Milwaukee, WI), June 2002

  11. Schmidt, T., Tyson, J., Galanulis, K., Full-Field Dynamic Displacement and Strain Measurement Using Advanced 3D Image Correlation Photogrammetry, Experimental Techniques, Vol.27, No.3, pp.41-44, May/June 2003.

    Article  Google Scholar 

  12. W. D. Lockwood, Borislav Tomas, and A. P. Reynolds “Mechanical Response of Friction Stir Welded AA 2024: Experiment and Modeling”,, Materials Science and Engineering, A, January 2002, vol. 323/1-2, pp. 349-354.

    Google Scholar 

  13. W. D. Lockwood and A. P. Reynolds “Simulation of the Global Response of a Friction Stir Weld Using Local Constitutive Behavior”, Materials Science and Engineering, A, January 2003, vol 339/1-2 pp 35-42.

    Google Scholar 

  14. M. Prime and A.R. Gonzales, The Contour Method: Simple 2-D Mapping of Residual Stresses, Proceedings of the 6th International Conference on Residual Stresses, Vol. 1 (Oxford, UK), July 10–12, 2000, p 617–624

  15. Prime, M., Cross-Sectional Mapping of Residual Stresses by Measuring the Surface Contour After a Cut, Journal of Engineering Materials and Technology, Vol 123, pp. 162-168, 2001

    Article  Google Scholar 

  16. Peel M et al. Microstructure, mechanical properties and residual stresses as a function of welding speed in aluminum AA5083 friction stir welds. Acta Mater 2003;51:4791–801.

    Article  CAS  Google Scholar 

  17. Svenson L, Karlsson L, Larsson H, Karlsson B, Fazzini M, Karlsson J. Sci. Tech. Weld. 2000; 5(5) pp 285-296.

    Article  Google Scholar 

  18. Goloborodko, A. et al. Friction stir welding of a commercial 7075-T6 aluminum alloy: grain refinement, thermal stability and tensile properties. Materials Transactions, Vol. 45, No. 8 (2004) pp. 2503 to 2508

    Article  CAS  Google Scholar 

  19. Venugopal, T. et al. Studies on friction stir welded AA 7075 aluminum alloy. Trans. Indian Inst. Met. Vol. 57, No. 6, 2004, pp. 659-663.

    CAS  Google Scholar 

  20. A.P. Reynolds, W. Tang, Z. Khandkar, J. A. Khan, and K. Lindner. Relationships among weld parameters, hardness distributions, and temperature histories in alloy 7050 friction stir welds”, Science and Technology of Welding and Joining, vol. 10, no. 2, 2005, pp. 190-199.

    Article  CAS  Google Scholar 

  21. C. Dale Donne, E. Lima, J. Wegener, A. Pyzalla, and T. Buslaps, Investigations on Residual Stresses in Friction Stir Welds, 3rd International Symposium on Friction Stir Welding (Kobe, Japan), 2001

  22. O. Hatamleh, Surface Hardness Changes in Laser Peened Friction Stir Welded 2195 and 7075 Aluminum Alloys, Int. J. Surf. Sci. Eng., 2008, 2(1/2)

    Google Scholar 

  23. G. Pouget, A.P. Reynolds. Residual stress and microstructure effects on fatigue crack growth in AA2050 friction stir welds International Journal of Fatigue 30 (2008) 463–472.

    Article  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Structures Branch, NASA–Johnson Space Center, Houston, TX, 77058, USA

    Omar Hatamleh

  2. Materials Branch, NASA–Johnson Space Center, Houston, TX, 77058, USA

    Scott Forth

  3. Mechanical Engineering Department, University of South Carolina, Columbia, SC, 29208, USA

    Anthony P. Reynolds

Authors
  1. Omar Hatamleh
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Scott Forth
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Anthony P. Reynolds
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Omar Hatamleh.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Hatamleh, O., Forth, S. & Reynolds, A.P. Fatigue Crack Growth of Peened Friction Stir-Welded 7075 Aluminum Alloy under Different Load Ratios. J. of Materi Eng and Perform 19, 99–106 (2010). https://doi.org/10.1007/s11665-009-9439-1

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11665-009-9439-1

Keywords

  • fatigue crack growth
  • friction stir welding
  • laser peening
  • shot peening
  • stress ratio, 7075