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首页> 外文期刊>ISIJ international >In situ Observations of Transformation Behavior upon Heating for a 1.5Mn-1.5Si-0.2C Steel -Comparison between Neutron Diffraction, XRD, EBSD and Dilatometry
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In situ Observations of Transformation Behavior upon Heating for a 1.5Mn-1.5Si-0.2C Steel -Comparison between Neutron Diffraction, XRD, EBSD and Dilatometry

机译：1.5Mn-1.5Si-0.2C钢加热时相变行为的原位观察-中子衍射，XRD，EBSD和膨胀计的比较

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摘要

The austenite reverse transformation behavior in a 1.5Mn-1.5Si-0.2C steel was in situ monitored using dilatometry, electron back scatter diffraction (EBSD), X-ray diffraction and neutron diffraction. The austenite reversion kinetics showed excellent agreements between dilatometry and neutron diffraction, whereas the austenite formation was observed to start at much higher temperature in cases of EBSD and X-ray diffraction measurements. Such discrepancy in transformation temperature is attributed to the change in chemical compositions near the surface of a specimen heated to elevated temperatures either in vacuum (EBSD) or in a helium gas atmosphere (X-ray); Mn and C concentrations were found to decrease with heating. In situ neutron diffraction enables us to investigate the changes in lattice constants of ferrite and austenite, showing not only thermal expansion but also suggesting carbon enrichment and phase stresses during the decomposition of the retained austenite and austenite reversion upon heating.
机译：使用膨胀计，电子背散射衍射（EBSD），X射线衍射和中子衍射对1.5Mn-1.5Si-0.2C钢中的奥氏体逆相变行为进行原位监测。奥氏体回复动力学显示出膨胀学和中子衍射之间极好的一致性，而在EBSD和X射线衍射测量中，观察到奥氏体的形成始于更高的温度。转变温度的这种差异归因于在真空（EBSD）或氦气气氛（X射线）中加热到高温的样品表面附近化学成分的变化。发现锰和碳的浓度随加热而降低。原位中子衍射使我们能够研究铁素体和奥氏体的晶格常数，不仅显示出热膨胀，而且还表明了残余奥氏体分解和加热时奥氏体回复时的碳富集和相应力。

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  • 来源
    《ISIJ international》 |2017年第12期|2237-2244|共8页
  • 作者

    Yo TOMOTA; Nobuaki SEKIDO; Stefanus HARJO; Takuro KAWASAKI; Wu GONG; Akira TANIYAMA;

  • 作者单位

    Research Center of Structure Materials, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047 Japan;

    Research Center of Structure Materials, National Institute for Materials Science, Now at Tohoku University, 6-6-02 Aobayama, Sendai, 980-8579 Japan;

    J-PARC Center, Japan Atomic Energy Agency, 2-4, Shirakata, Tokai, Naka-gun, Ibaraki, 319-1195 Japan;

    J-PARC Center, Japan Atomic Energy Agency, 2-4, Shirakata, Tokai, Naka-gun, Ibaraki, 319-1195 Japan;

    Elements Strategy Initiative for Structural Materials, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto, 606-8501 Japan;

    Advanced Technology Research Laboratories, Nippon Steel & Sumi-tomo-Metal Co., 20-1, Shintomi, Futtsu, Chiba, 293-8511 Japan;

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

    reverse transformation; austenite volume fraction; neutron diffraction; X-ray diffraction; elec-tron back scatter diffraction; dilatometry; in situ measurement;

    机译：逆变换奥氏体体积分数;中子衍射X射线衍射;电子背散射衍射;膨胀计原位测量;

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