Skip to main content
SpringerLink
Log in

Effects of T6-treatment on the defect susceptibility of tensile strength to microporosity variation in low pressure die-cast A356 alloy

  • Published:
Metals and Materials International Aims and scope Submit manuscript

Abstract

This study aims to investigate the contribution of microstructural changes to the variability in the tensile strength during T6 heat treatment and to suggest a set of conditions for optimal heat treatment in terms of the defect susceptibility of tensile strength to microporosity variation and the maximum tensile strength achievable in a defectfree condition. The test specimens were taken from the section of an automotive wheel with 5 spokes, which was fabricated through the low pressure die-cast process, and the porosity measurement was performed by SEM fractography analysis on all test specimens. The decrease in the defect susceptibility was fundamentally due to microstructural changes such as the shape and spacing between Si particles, secondary dendrite arm spacing and the total fraction of Si particles on solutionising treatment, with hardening effect on artificial aging. A solution treatment at 540 °C for 6 h and aging at160°C for 48 h are suggested as the optimum heat treatment conditions for enhancing yield strength and ultimate tensile strength, as well as for minimising the defect susceptibility of tensile strength to microporosity variation.

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. C. D. Lee, Met. Mater. Int. 20, 1027 (2014).

    Article  Google Scholar 

  2. S. Farahany, A. Ourdjini, T. Baker, and M. H. Idris, Met. Mater. Int. 20, 929 (2014).

    Article  Google Scholar 

  3. Y. G. Jung, W. S. Yang, S. K. Kim, H. K. Lim, and D. H. Kim, Korean J. Met. Mater. 52, 805 (2014).

    Google Scholar 

  4. M. Z. Bian and K. S. Shin, Met. Mater. Int. 19, 999 (2013).

    Article  Google Scholar 

  5. C. D. Lee, Met. Mater. Int. 16, 543 (2010).

    Article  Google Scholar 

  6. K. S. Song, H. C. Jung, and K. S. Shin, Met. Mater. Int. 17, 397 (2011).

    Article  Google Scholar 

  7. M. K. Surappa, E. Blank, and J. C. Jaquet, Scripta Mater. 20, 1281 (1986).

    Article  Google Scholar 

  8. J. P. Weiler, J. T. Wood, R. J. Klassen, E. Maire, R. Berkmortel, and G. Wang, Mater. Sci. Eng. A 395, 315 (2005).

    Article  Google Scholar 

  9. A. M. Gokhale and G. R. Patel, Mater. Charact. 54, 13 (2005).

    Article  Google Scholar 

  10. A. M. Gokhale and G. R. Patel, Scripta Mater. 52, 237 (2005).

    Article  Google Scholar 

  11. M. D. Dighe and A. M. Gokhale, Scripta Mater. 37, 1435 (1997).

    Article  Google Scholar 

  12. M. D. Dighe, A. M. Gokhale, M. F. Horstemeyer, and D. A. Mosher, Metall. Mater. Trans. A 31, 1725 (2000).

    Article  Google Scholar 

  13. M. D. Dighe, A. M. Gokhale, and M. F. Horstemeyer, Metall. Mater. Trans. A 33, 555 (2002).

    Article  Google Scholar 

  14. J. Gammage, D. Wilkinson, Y. Brechet, and D. Embury, Acta Mater. 52, 5255 (2004).

    Article  Google Scholar 

  15. J. P. Bandstra and D. A. Koss, Mater Sci Eng. A 319-321, 490 (2008).

    Article  Google Scholar 

  16. C. D. Lee, T. I. So, and K. S. Shin, Mater. Sci. Eng. A 599, 28 (2014).

    Article  Google Scholar 

  17. C. D. Lee, Mater. Sci. Eng. A 488, 296 (2008).

    Article  Google Scholar 

  18. C. D. Lee, Mater. Sci. Eng. A 527, 3144 (2010).

    Article  Google Scholar 

  19. A. K. Ghosh, Acta Metall. 25, 1413 (1977).

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Magnesium Technology Innovation Center, Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-744, Republic of Korea

    Tae Il So, Hwa Chul Jung & Kwang Seon Shin

  2. Department of Metallurgical & Materials Engineering, Inha Technical College, 100 Inha-ro, Yonghyun-Dong, Nam-Gu, Incheon, 402-752, Republic of Korea

    Choong Do Lee

Authors
  1. Tae Il So
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Hwa Chul Jung
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Choong Do Lee
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Kwang Seon Shin
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding authors

Correspondence to Choong Do Lee or Kwang Seon Shin.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

So, T.I., Jung, H.C., Lee, C.D. et al. Effects of T6-treatment on the defect susceptibility of tensile strength to microporosity variation in low pressure die-cast A356 alloy. Met. Mater. Int. 21, 842–849 (2015). https://doi.org/10.1007/s12540-015-5247-3

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s12540-015-5247-3

Keywords

Search

Navigation