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Cyclic deformation behavior and microstructure evolution of high-carbon nano-bainitic steel at different tempering temperatures

机译：高碳纳米贝氏体钢在不同回火温度下的循环变形行为和组织演变

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摘要

Bainitic steel is applied in many cyclic loading projects due to its excellent comprehensive mechanical properties. In this study, the cyclic hardening/softening behavior and microstructure evolution of high-carbon nano-bainitic steel were investigated to analyze the cyclic deformation mechanism. Results showed that the optimal tempering temperature was determined to be at low temperature. During cyclic deformation, the retained austenite is transformed into martensite according to the Kurdjumov-Sachs (K-S) and Nishiyama-Wassermann (N-W) orientation relationships, and deformation twins are generated in the retained austenite. The cyclic deformation of high-carbon steels at a total strain amplitude of 0.6% manifests no obvious cyclic softening behavior after low-temperature tempering, mainly due to the high density of dislocation tangle around martensite and deformation twins induced by cyclic deformation.
机译：贝氏体钢由于其优异的综合机械性能而被用于许多循环加载项目中。本研究通过研究高碳纳米贝氏体钢的循环硬化/软化行为和组织演变来分析循环变形机理。结果表明，最佳回火温度确定为低温。在周期性变形过程中，残余奥氏体根据Kurdjumov-Sachs（K-S）和Nishiyama-Wassermann（N-W）取向关系转变为马氏体，并且在残余奥氏体中生成变形孪晶。高碳钢在总应变幅度为0.6％时的循环变形在低温回火后没有明显的循环软化行为，这主要是由于马氏体周围的位错缠结的高密度以及循环变形引起的变形孪晶。

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  • 来源
    《Materials Science and Engineering》 |2019年第28期|323-331|共9页
  • 作者

    Zhao Xiaojie; Zhang Fucheng; Yang Zhinan; Zhao Jiali;

  • 作者单位

    Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Hebei, Peoples R China;

    Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Hebei, Peoples R China;

    Yanshan Univ, Natl Engn Res Ctr Equipment & Technol Cold Strip, Qinhuangdao 066004, Hebei, Peoples R China;

    Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Hebei, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Bainitic steel; Tempering; Low cycle fatigue; Microstructure;

    机译：贝氏体钢;回火;低周疲劳;显微组织;

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