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Journal of Central South University

, Volume 18, Issue 2, pp 290–295 | Cite as

Microstructures, mechanical properties and compressive creep behaviors of as-cast Mg-5%Sn-(0–1.0)%Pb alloys

  • Qing Wang (王卿)
  • Yun-gui Chen (陈云贵)Email author
  • Su-fen Xiao (肖素芬)
  • Hong-mei Liu (刘红梅)
  • Yong-bai Tang (唐永柏)
  • Yuan-hua Zhao (赵源华)
Article

Abstract

The microstructures, tensile properties and compressive creep behaviors of Mg-5%Sn-(0–1.0)%Pb (mass fraction) alloys were studied. The microstructures of the Mg-Sn-Pb alloys consist of dendritic α-Mg and Mg2Sn phase. The addition of Pb can refine the size of Mg2Sn phase and grain size, reduce the amount of Mg2Sn phase at grain or inter-dendrite boundaries and change the distribution of Mg2Sn phase. Pb exists in the Mg2Sn phase or dissolves in α-Mg matrix. The mechanical properties of the tested alloys at room temperature are improved with the addition of Pb. When the Pb content is over 0.5%, the mechanical properties are decreased gradually. The Mg-5%Sn-0.5%Pb shows the best ultimate tensile strength and elongation, 174 MPa and 14.3%, respectively. However, the compressive creep resistance of the Mg-Sn-Pb alloys is much lower than that of the Mg-Sn binary alloy at 175 °C with applied load of 55 MPa, which means that Pb has negative effects on the compressive creep resistance of the as-cast Mg-Sn alloys.

Key words

Mg-Sn-Pb alloy microstructures mechanical properties compressive creep Mg2Sn phase 

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Copyright information

© Central South University Press and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Qing Wang (王卿)
    • 1
  • Yun-gui Chen (陈云贵)
    • 1
    Email author
  • Su-fen Xiao (肖素芬)
    • 1
  • Hong-mei Liu (刘红梅)
    • 2
  • Yong-bai Tang (唐永柏)
    • 1
  • Yuan-hua Zhao (赵源华)
    • 1
  1. 1.School of Materials Science and EngineeringSichuan UniversityChengduChina
  2. 2.Department of Chemical and Materials EngineeringThe University of AucklandAucklandNew Zealand

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