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首页> 外文期刊>High temperature materials and processes >An Improved Arrhenius Constitutive Model and Three-Dimensional Processing Map of a Solution-Treated Ni-Based Superalloy
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An Improved Arrhenius Constitutive Model and Three-Dimensional Processing Map of a Solution-Treated Ni-Based Superalloy

机译：固溶镍基高温合金的改进Arrhenius本构模型和三维加工图

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摘要

The hot deformation behaviors of a solution-treated Ni-based superalloy are investigated by hot compression tests over wide ranges of strain rate and forming temperature. Based on the experimental data, the effects of forming temperature and strain rate on the hot deformation behaviors are discussed in detail. Considering the effects of strain on material constants, comprehensive constitutive models are developed to describe the relationships between the flow stress, strain rate and forming temperature for the studied superalloy. The three-dimensional processing map is constructed to optimize the hot working parameters. Meanwhile, the microstructures are analyzed to correlate with the processing map. It is found that the flow stress is sensitive to the forming temperature, strain rate and deformation degree. With the increase of forming temperature or the decrease of strain rate, the flow stress significantly decreases. The predicted flow stresses agree well with experimentally measured results, which confirm that the developed constitutive model can accurately estimate the flow stress of the studied superalloy. The three-dimensional processing map shows that the optimum deformation windows for hot working are the domains with 980-1,040℃ or 0.001-0.1 s~(-1) when the strain is 0.6. Also, it is found that the dynamically recrystallized grain size increases with the increase of forming temperature or the decrease of strain rate.
机译：通过热压缩试验，在较宽的应变速率和成形温度范围内研究了固溶处理的镍基高温合金的热变形行为。根据实验数据，详细讨论了成形温度和应变速率对热变形行为的影响。考虑到应变对材料常数的影响，建立了综合的本构模型来描述所研究的高温合金的流变应力，应变速率和成形温度之间的关系。构造三维加工图以优化热加工参数。同时，分析微观结构以使其与加工图相关。发现流动应力对成形温度，应变速率和变形程度敏感。随着成形温度的升高或应变率的降低，流动应力显着降低。预测的流动应力与实验测量结果吻合良好，这证实了所开发的本构模型可以准确地估计所研究的高温合金的流动应力。三维加工图表明，当应变为0.6时，热加工的最佳变形窗口为980-1,040℃或0.001-0.1 s〜（-1）。而且，发现动态再结晶晶粒尺寸随着成形温度的增加或应变率的降低而增加。

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  • 来源
    《High temperature materials and processes》 |2016年第1期|55-64|共10页
  • 作者

    Hong-Bin Li; Yun-Li Feng;

  • 作者单位

    College of Metallurgy and Energy, HeBei United University, Tangshan 063009, China Hebei Key Lab of Modern Metallurgy, Tangshan 063009, China;

    College of Metallurgy and Energy, HeBei United University, Tangshan 063009, China Hebei Key Lab of Modern Metallurgy, Tangshan 063009, 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; hot deformation; constitutive model; processing map; microstructure;

    机译：合金;热变形本构模型加工图;微观结构;

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