J. Mater. Sci. Technol. ›› 2011, Vol. 27 ›› Issue (1): 29-34.

• Research Articles • 上一篇    下一篇

Influence of grain size and texture on the yield asymmetry of Mg-3Al-1Zn alloy

尹树明   

  1. 沈阳化工学院
  • 收稿日期:2010-01-21 修回日期:2010-04-01 出版日期:2011-01-28 发布日期:2011-01-30
  • 通讯作者: 尹树明

Influence of Grain Size and Texture on the Yield Asymmetry of Mg-3Al-1Zn Alloy

S.M. Yin, C.H. Wang, Y.D. Diao, S.D. Wu, S.X. Li   

  1. 1) Shenyang University of Chemical Technology, Shenyang 110142, China
    2) Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2010-01-21 Revised:2010-04-01 Online:2011-01-28 Published:2011-01-30
  • Contact: YIN ShuMing
  • Supported by:

    the National Natural Science Foundation of China under Grant Nos. 50471082 and 50571102

RichHTML

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摘要： Abstract The yield asymmetry between compression and tension of magnesium alloy Mg-3Al-1Zn (AZ31) with different grain sizes and textures has been studied by tensile and compressive testing of as-cast, as-extruded and equal channel angular pressed (ECAPed) specimens. The significant yield asymmetry (the ratio of yield strength between compression and tension σyc/σyt is ~0.44) was found in as-extruded specimens and the corresponding microstructure evolution during deformation revealed that tensile twinning is the underlying reason for the large yield asymmetry. Strong texture and grain size are influential factors for large yield asymmetry. The separate contributions of grain size and texture on yield asymmetry were investigated.

Abstract: The yield asymmetry between compression and tension of magnesium alloy Mg-3Al-1Zn (AZ31) with different grain sizes and textures has been studied by tensile and compressive testing of as-cast, as-extruded and equal channel angular pressed (ECAPed) specimens. The significant yield asymmetry (the ratio of yield strength between compression and tension σyc/σyt is~0.44) was found in as-extruded specimens and the corresponding microstructure evolution during deformation revealed that {1012} tensile twinning is the underlying reason for the large yield asymmetry. Strong texture and grain size are influential factors for large yield asymmetry. The separate contributions of grain size and texture on yield asymmetry were investigated.

Key words: Magnesium alloys, Yield asymmetry, Texture, Grain size, Equal channel angular pressing (ECAP)