Advertisement

Journal of Materials Science

, Volume 42, Issue 24, pp 9983–9989 | Cite as

Microstructure and properties of Mg–5.6%Sn–4.4%Zn–2.1%Al alloy

  • S. Harosh
  • L. Miller
  • G. Levi
  • M. Bamberger
Article

Abstract

In a previous study, Mg–Sn–Zn-based alloys showed insufficient structural stability at elevated temperatures. In order to improve the castability and corrosion resistance 2.1%wt Al was added to the Mg–5.6%Sn–4.4%Zn base alloy. At the as-cast condition, SEM micrographs indicate a very fine microstructure (Dendritic Arm Spacing—DAS—smaller than 17 μm). The study focuses on precipitation hardening, phase formation and structural stability, during the aging of solution treated samples at elevated temperatures. After solution treatment and aging at 225 °C, Vickers hardness measurements show that this alloy maintains a constant increase of 30% in hardness for periods of up to 32 days. EDS (SEM & STEM), XRD, and Auger characterization methods were applied to identify the phases presented in the alloy. There is no evidence for the presence of the deleterious γ-Al12 Mg17 phase. SAXS measurement and STEM micrographs reveal very fine precipitations (less than 100 nm) after 32 days of aging, along with homogenously distributed larger precipitations (up to 500 nm).

Keywords

Solution Treatment Precipitation Hardening Hardness Peak SAXS Measurement Vickers Hardness Measurement 

References

  1. 1.
    Regev M, Rosen A, Bamberger M (1999) In: Froes FH, Ward-Close CM, Eliezer D, McCormick P (ed) Synthesis of lightweight metals III, TMS 163Google Scholar
  2. 2.
    Zhang Z, Couture A (1998) Scripta Mater 39:45CrossRefGoogle Scholar
  3. 3.
    Blum W, Zhang P, Watzinger B, Grossmann BV, Haldenwanger H (2001) Mater Sci Eng A319–321:735CrossRefGoogle Scholar
  4. 4.
    Cohen S, Goren-Muginstein GR, Abraham S, Dehm G, Bamberger M (2004) In: Luo AA (ed) Mg Technology 2004, TMS 2004 annual meeting, Charlotte, USA, 14–18 March 2004, p 301Google Scholar
  5. 5.
    Cohen S, Goren-Muginstein G, Avraham S, Rashkova B, Dehm G, Bamberger M (2005) Zeitschrift für Metasllkunde 96:1081CrossRefGoogle Scholar
  6. 6.
    Horie T, Iwahori H, Seno Y, Awano Y (2000) In: Kaplan HI, Hyrn JN, Clow BB (eds) Mg Technology 2000, TMS 2000 annual meeting, Nashville, USA, 12–15 March 2000, p 261Google Scholar
  7. 7.
    Maeng D, Kim T, Lee J, Hong S, Seo S, Chun B (2000) Scripta Mater 43:385CrossRefGoogle Scholar
  8. 8.
    Massalski T (1992) Binary alloy phase diagrams, 2nd edn. ASM IntGoogle Scholar
  9. 9.
    Gorny A, Katsman A, Popov I, Bamberger M (2007) In: Beals RS, Lou AA, Neelameggham NR, Pekguleryuz MO (eds) Mg Technology 2007, TMS 2007 annual meeting, Orlando, USA, 26 February, 1 March 2007, p 307Google Scholar
  10. 10.
    Reed-Hill RE, Abbaschian R (1992) Physical metallurgy principles. PWS-KENT Publishing Co., Boston, MA, USA, pp 677–678Google Scholar
  11. 11.
    Bamberger M, Levi G, Vander Sande JB (2006) Metall Mater Trans A 37:481CrossRefGoogle Scholar
  12. 12.
    Wang Y, Guan S, Zeng X, Ding W (2006) Mater Sci Eng A416:109CrossRefGoogle Scholar
  13. 13.
    Smithells CJ (1970) Metals reference book, 5th ednGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Department of Material EngineeringTechnion IITHaifaIsrael

Personalised recommendations