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首页> 外文期刊>Materials Science and Engineering >Hydrogen embrittlement behavior of high strength rail steels: A comparison between pearlitic and bainitic microstructures
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Hydrogen embrittlement behavior of high strength rail steels: A comparison between pearlitic and bainitic microstructures

机译：高强度钢的氢脆行为：珠光体和贝氏体组织的比较

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摘要

The present study was attempted to evaluate the hydrogen embrittlement (HE) behavior of two high strength rail steels with pearlitic and bainitic microstructures by using slow strain rate test (SSRT) with notched round bar specimens. The results show that the bainitic rail steel with a mixed microstructure of bainite, tempered mar-tensite and M/A constituents exhibits superior mechanical properties in comparison with the pearlitic rail steel. The results of SSRT revealed that the bainitic rail steel is more susceptible to HE than the pearlitic rail steel, which is ascribed mainly to the higher strength level and the microstructural characteristics of the bainitic rail steel. The attempt of re-tempering treatment of the as-received bainitic rail steel exhibits no notable improvement in the resistance to HE at no expense of strength. It is thus suggested that further efforts concerning obtaining low susceptibility to HE besides obtaining excellent combination of strength and toughness should be conducted to guarantee the safety service of the bainitic steel rails.
机译：本研究试图通过使用带缺口圆棒试样的慢应变速率测试（SSRT）来评估两种具有珠光体和贝氏体微结构的高强度钢的氢脆性（HE）行为。结果表明，与珠光体钢相比，具有贝氏体，回火马氏体和M / A成分混合组织的贝氏体钢具有更好的力学性能。 SSRT的结果表明，贝氏体钢比HE更加容易受到HE的影响，这主要归因于贝氏体钢的更高的强度水平和显微组织特性。如此进行的贝氏体钢的回火处理的尝试在不牺牲强度的情况下未显示出对HE的抵抗性的显着改善。因此，建议除了确保强度和韧性的优异组合之外，还应进一步努力获得对HE的低敏感性，以确保贝氏体钢轨的安全服务。

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  • 来源
    《Materials Science and Engineering》 |2017年第17期|199-206|共8页
  • 作者

    Weijun Hui; Zhibao Xu; Yongjian Zhang; Xiaoli Zhao; Chengwei Shao; Yuqing Weng;

  • 作者单位

    School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, PR China;

    School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, PR China;

    School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, PR China;

    School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, PR China;

    School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, PR China;

    School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Hydrogen embrittlement; Microstructures; Rail steel; Pearlitic steel; Bainitic steel;

    机译：氢脆微观结构;轨道钢;珠光体钢;贝氏体钢;

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