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Life assessment of die-cast Mg-5Al-1.7Ca alloys under creep service conditions

机译：蠕变工况下压铸Mg-5Al-1.7Ca合金的寿命评估

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摘要

The creep rupture behavior of a Mg-5Al-1.7Ca alloy produced via die casting was investigated at temperatures between 423 and 498 K, and the creep rupture life of the alloy was evaluated using the Larson-Miller parameter (LMP). It was demonstrated that the minimum creep rate and creep rupture life followed the phenomenological Monkman-Grant relationship. The value of the LMP was uniquely described by the logarithm of the applied stress when the Larson-Miller constant was set at 20. In addition, the applied stress and the LMP value followed a linear relationship below the yield stress. These results can be utilized to predict the long-term creep rupture life of the alloy under a given temperature condition and applied stress.
机译：研究了通过压铸生产的Mg-5Al-1.7Ca合金在423至498 K之间的蠕变断裂行为，并使用Larson-Miller参数（LMP）评估了该合金的蠕变断裂寿命。结果表明，最小蠕变速率和蠕变断裂寿命遵循现象学的蒙克曼-格兰特关系。当Larson-Miller常数设置为20时，LMP的值由施加应力的对数唯一描述。此外，施加应力和LMP值在屈服应力以下呈线性关系。这些结果可用于预测在给定温度条件和施加应力下合金的长期蠕变断裂寿命。

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  • 来源
    《Materials Science and Engineering》 |2014年第8期|136-140|共5页
  • 作者

    Yoshihiro Terada; Yoshinori Murata; Tatsuo Sato;

  • 作者单位

    Department of Materials Science and Engineering, Tokyo Institute of Technology, Midori-ku, Yokohama 226-8502, Japan;

    Department of Materials, Physics and Energy Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan;

    Precision and Intelligence Laboratory, Tokyo Institute of Technology, Midori-ku, Yokohama 226-8503, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Magnesium alloys; Die casting; Creep; Rupture;

    机译：镁合金;压铸;蠕变;破裂;

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