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首页> 外文期刊>Materials Science and Engineering >Enhanced very high cycle fatigue performance of extruded Mg-12Gd-3Y-0.5Zr magnesium alloy
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Enhanced very high cycle fatigue performance of extruded Mg-12Gd-3Y-0.5Zr magnesium alloy

机译：Mg-12Gd-3Y-0.5Zr挤压镁合金的极高周疲劳性能

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摘要

Very high-cycle fatigue behaviors of extruded Mg-12Gd-3Y-0.5Zr (GW123k) magnesium alloy have been investigated and compared to that of conventional extruded AZ31 magnesium alloy. Typical post-fatigue microstructure and surface morphology features are presented for both the GW123k and the AZ31 alloy in order to stand out the uniqueness of GW123k alloy. Respective fatigue damage mechanisms for both alloys were also proposed in accordance. It is found that GW123k alloy contains a large amount of precipitated particles and possesses a relatively weak texture, which give rise to its much relieved tension-compression yield asymmetry and enhanced fatigue failure resistance. The much homogenized deformation mechanism in GW123k alloy is considered the underline reason for the improvement of material's fatigue performance.
机译：研究了Mg-12Gd-3Y-0.5Zr（GW123k）挤压镁合金的极高循环疲劳行为，并将其与常规挤压AZ31镁合金进行了比较。提出了GW123k和AZ31合金的典型疲劳后显微组织和表面形态特征，以突出GW123k合金的独特性。两种合金的疲劳损伤机理也分别提出了。发现GW123k合金含有大量沉淀颗粒，并且具有相对较弱的织构，这导致其大大减轻了拉伸压缩屈服不对称性并增强了抗疲劳破坏性。 GW123k合金中非常均匀的变形机制被认为是改善材料疲劳性能的重要原因。

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  • 来源
    《Materials Science and Engineering》 |2011年第6期|p.2231-2238|共8页
  • 作者

    F. Yang; F. Lv; X.M. Yang; S.X. Li; Z.F. Zhang; Q.D. Wang;

  • 作者单位

    Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China;

    Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China;

    Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China;

    Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China;

    Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China;

    National Engineering Research Center of Light Alloys Net Forming, Shanghai Jiao Tong University, 1954 Huashan Road, Shanghai 200030, China;

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  • 正文语种 eng
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  • 关键词

    Mg-Gd-Y-Zr alloy; AZ31 alloy; very high cycle fatigue; crack initiation; yield asymmetry; texture;

    机译：Mg-Gd-Y-Zr合金;AZ31合金;极高的循环疲劳;裂纹萌生屈服不对称质地;

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