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首页> 外文期刊>High temperature materials and processes >Generation of Constant Life Diagram under Elevated Temperature Ratcheting of 316LN Stainless Steel
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Generation of Constant Life Diagram under Elevated Temperature Ratcheting of 316LN Stainless Steel

机译：316LN不锈钢高温棘轮下恒定寿命图的生成

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摘要

Combined influence of mean stress and stress amplitude on the cyclic life under elevated temperature (823-923 K) ratcheting of 316LN austenitic stainless steel is discussed. Constant life Haigh diagrams have been generated, using different combinations of stress amplitude and mean stress. In the plastic domain, the allowable stress was found to increase or decrease with mean stress depending on the temperature and combination of mean stress - stress amplitude employed. Strong influence of dynamic strain aging (DSA) was found at 823 K which affected the mode of deformation of the material in comparison with 923 K. Failure mode expressed through a fracture mechanism map was found to change from fatigue to necking depending on the test temperature as well as combinations of mean stress and stress amplitude. Occurrence of DSA at 823 K proved to be beneficial by way of extending the safe zone of operation to higher R-ratios in comparison with 923 K.
机译：讨论了平均应力和应力幅度对316LN奥氏体不锈钢在高温（823-923 K）棘轮下循环寿命的综合影响。使用应力振幅和平均应力的不同组合已生成恒定寿命的海格图。在塑性域中，发现容许应力随平均应力而增加或减小，具体取决于温度以及平均应力-所采用的应力幅度的组合。与923 K相比，在823 K时发现了动态应变时效（DSA）的强烈影响，该变化影响了材料的变形模式。通过断裂机理图表示的失效模式根据测试温度从疲劳变为颈缩。以及平均应力和应力振幅的组合。通过将安全操作区域扩展到比923 K更高的R比率，在823 K处发生DSA证明是有益的。

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  • 来源
    《High temperature materials and processes》 |2016年第4期|361-368|共8页
  • 作者

    Aritra Sarkar; A. Nagesha; R. Sandhya; M.D. Mathew;

  • 作者单位

    Mechanical Metallurgy Division, Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam-603102, Tamil Nadu, India;

    Mechanical Metallurgy Division, Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam-603102, Tamil Nadu, India;

    Mechanical Metallurgy Division, Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam-603102, Tamil Nadu, India;

    Mechanical Metallurgy Division, Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam-603102, Tamil Nadu, India;

  • 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

    ratcheting; mean stress; stress amplitude; 316LN SS;

    机译：棘轮平均压力应力振幅316LN不锈钢;

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