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Microstructure and Creep Property of Isothermal Forging GH4169G Superalloy

机译：等温锻造GH4169G高温合金的组织和蠕变性能

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摘要

By means of direct aging, microstructure observation and creep property measurement, the microstructure and creep behaviors of GH4169G superalloy are investigated. Results show that, after direct aging, the grain size is inhomogeneous in the alloy, and some 8 precipitates discontinuously distribute in the grain and along the boundaries, which may improve the bonding strength of the boundaries. Under the experimental conditions, the creep activation energy of the alloy during steady-state creep are calculated to be Q = 594.7 kJ/mol. During creep, the deformation features of the alloy are twinning deformation and dislocations slipping in the matrix. As creep goes on, deformed dislocations pile up near the boundary regions to induce stress concentration for promoting the initiation and propagation of cracks along boundaries.
机译：通过直接时效，组织观察和蠕变性能测量，研究了GH4169G高温合金的组织和蠕变行为。结果表明，直接时效后，合金中的晶粒尺寸不均匀，并且约有8个析出物不连续地分布在晶粒中和沿晶界，这可以提高晶界的结合强度。在实验条件下，合金在稳态蠕变过程中的蠕变活化能经计算为Q = 594.7 kJ / mol。在蠕变期间，合金的变形特征是孪生变形和位错在基体中滑动。随着蠕变的进行，形变位错在边界区域附近堆积，引起应力集中，从而促进了裂纹沿边界的萌生和扩展。

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  • 来源
    《High temperature materials and processes》 |2014年第5期|447-451|共5页
  • 作者

    Zhenrong Li; Chunlei Ma; Sugui Tian; Liqing Chen; Xianghua Liu;

  • 作者单位

    College of Light Industry, Liaoning University, Shenyang 110036, China;

    College of Light Industry, Liaoning University, Shenyang 110036, China;

    School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China;

    State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, China;

    State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, 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

    GH4169G superalloy; microstructure; creep behavior;

    机译：GH4169G高温合金;微观结构蠕变行为;

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