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首页> 外文期刊>High temperature materials and processes >A Yield Stress Model for a Solution-Treated Ni-Based Superalloy during Plastic Deformation
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A Yield Stress Model for a Solution-Treated Ni-Based Superalloy during Plastic Deformation

机译：固溶处理的镍基高温合金塑性变形的屈服应力模型

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摘要

Up to now, there are few reports on the yield behavior of Ni-based superalloy during plastic deformation. However, an accurate yield stress model is significant for simulating the plastic forming process by cellular automaton or finite element methods. Therefore, the yield behavior of a solution-treated Ni-based superalloy is studied by hot compression tests. In order to evaluate yield stresses from the measured flow stress curves, the yield process is analyzed in terms of dislocation theory. Then, yield stresses at different deformation temperatures and strain rates are clearly determined. The experimental results show that the yield stresses are highly sensitive to deformation temperature and strain rate. The determined yield stress almost linearly increases with the increase of the logarithm of strain rate or the reciprocal of deformation temperature. A yield stress model is developed to correlate the yield behavior of the studied solution-treated Ni-based superalloy with deformation temperature, strain rate, and strengthening effect of alloying elements. The developed model can well describe the yield behavior of the studied solution-treated Ni-based superalloy.
机译：到目前为止，关于塑性变形过程中镍基高温合金屈服行为的报道很少。但是，精确的屈服应力模型对于通过元胞自动机或有限元方法模拟塑性成形过程非常重要。因此，通过热压缩试验研究了固溶处理的镍基高温合金的屈服行为。为了从测得的流动应力曲线评估屈服应力，根据位错理论分析了屈服过程。然后，清楚地确定了在不同变形温度和应变速率下的屈服应力。实验结果表明，屈服应力对变形温度和应变率高度敏感。所确定的屈服应力几乎随应变率的对数或变形温度的倒数的增加而线性增加。建立了屈服应力模型，以使所研究的固溶处理的镍基高温合金的屈服行为与变形温度，应变速率和合金元素的强化作用相关。开发的模型可以很好地描述所研究的固溶处理的镍基高温合金的屈服行为。

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  • 来源
    《High temperature materials and processes》 |2018年第10期|849-856|共8页
  • 作者

    Liu Yan-Xing; Lin Y. C.;

  • 作者单位

    Cent S Univ, Sch Mech & Elect Engn, Changsha 410083, Hunan, Peoples R China;

    State Key Lab High Performance Complex Mfg, Changsha 410083, Hunan, Peoples R China;

    Cent S Univ, Light Alloy Res Inst, Changsha 410083, Hunan, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    alloy; yield behavior; dislocation; strengthening effect; alloying elements;

    机译：合金;屈服行为;位错;强化效应;合金元素;

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