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


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).


Solution Treatment Precipitation Hardening Hardness Peak SAXS Measurement Vickers Hardness Measurement 


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Department of Material EngineeringTechnion IITHaifaIsrael

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