Advertisement

JOM

, Volume 71, Issue 1, pp 382–390 | Cite as

The Development of High Strength and Ductility in High-Pressure Die-Cast Al-Si-Mg Alloys from Secondary Sources

  • Roger LumleyEmail author
Aluminum: New Alloys and Heat Treatment
  • 78 Downloads

Abstract

The current article describes the results of a study aimed at developing new compositions of Al-Si-Mg high-pressure die-cast alloys, which display improved ductility in as-cast and heat-treated conditions. Studies of the new alloys, which contain higher than normal Mn contents and lower than normal Fe contents, have shown that compositions generated through the use of recycled wheels made from A356 alloy (“Troma”) may achieve the goals. As-cast, T4 and T6 heat-treated high-pressure die cast compositions have been evaluated. T4 and some T6 tempers are shown to produce an optimal combination of 0.2% proof stress, tensile strength and elongation. Some compositions also require a significantly reduced temperature of solution treatment to generate excellent combinations of mechanical properties. The alloys developed can be considered for structural die castings in modern automotive applications.

Notes

Acknowledgements

Thanks are given for the assistance of N. Deeva from CSIRO, Australia. This work was conducted by the author at CSIRO, Australia.

References

  1. 1.
    R.N. Lumley, R.G. O’Donnell, D.R. Gunasegaram, and M. Givord, Metall. Mater. Trans. A 38A, 2564 (2007).CrossRefGoogle Scholar
  2. 2.
    R.N. Lumley, R.G. O’Donnell, D.R. Gunasegaram, and M. Givord, Giessereiforschung 59, 8 (2007).Google Scholar
  3. 3.
    R.N. Lumley, I.J. Polmear, and P.R. Curtis, Metall. Mater. Trans. A 40A, 1716 (2009).CrossRefGoogle Scholar
  4. 4.
    R.N. Lumley, R.G. O’Donnell, D.R. Gunasegaram, and M. Givord, Mater. Sci. Forum 519–522, 351 (2006).CrossRefGoogle Scholar
  5. 5.
    R.N. Lumley, D. Viano, J.R. Griffiths, and C.J. Davidson, in Conference Proceedings of ICAA12, Yokohama, Japan (2010), p. 345.Google Scholar
  6. 6.
    R.N. Lumley, Progress on the heat treatment of high pressure diecastings.Fundamentals of Aluminium Metallurgy, ed. R.N. Lumley (Abington: Woodhead Publishing, 2010), p. 262.Google Scholar
  7. 7.
    R. Olsen and H. Sattlethight, Aluminum Statistical Review (Arlington: The Aluminum Association, 2016).Google Scholar
  8. 8.
    Institute of Scrap Recycling Industries Inc., ISRI 2018 Scrap Recycling Circular, http://www.isri.org/recycling-commodities/scrap-specifications-circular. Accessed May 2018.
  9. 9.
    S. Wetzel, Mod. Cast. 105, 28 (2015).Google Scholar
  10. 10.
    AS1391-2007, Metallic Materials—Tensile Testing at Ambient Temperature, Revised 2017.Google Scholar
  11. 11.
    North American Diecasting Association, NADCA Product Specification Standards for Die Casting, 10th ed. (Arlington: North American Diecasting Association, 2018).Google Scholar
  12. 12.
    J.L. Jorstad, Die Cast. Eng. 30, 30–36 (1986).Google Scholar
  13. 13.
    The Aluminum Association, Designations and Chemical Composition Limits for Aluminum Alloys in the Form of Castings and Ingot (Arlington: Registration Record Pink Sheets, The Aluminum Association, 2015).Google Scholar
  14. 14.
    ASTM B108, Standard Specification for Aluminum-Alloy Permanent Mold Castings (2015).Google Scholar
  15. 15.
    AMS-A-21180C, Aluminum-Alloy Casting, High Strength (2017).Google Scholar

Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  1. 1.La Trobe UniversityMelbourneAustralia
  2. 2.AWBell Pty. LtdMelbourneAustralia

Personalised recommendations