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首页> 外文期刊>Metals and Materials International >Characterization of phase fractions and misorientations on tempered Bainitic/Martensitic Ni-Cr-Mo low alloy RPV steel with various Ni content
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Characterization of phase fractions and misorientations on tempered Bainitic/Martensitic Ni-Cr-Mo low alloy RPV steel with various Ni content

机译：不同Ni含量的回火贝氏体/马氏体Ni-Cr-Mo低合金RPV钢的相分数和取向错误的表征

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摘要

The aim of this paper to quantitatively characterize the microstructure of tempered martensitic/bainitic Ni-Cr-Mo steels with different Ni contents. Though it is difficult to characterize the phase factions in the Ni-Cr-Mo low alloy steel due to the microstructural similarity of tempered lower bainite and tempered martensite, the phase fractions could determined with the as-quenched specimens by using three successive measurements of ferrite scope, scanning electron microscopy images and electron back-scattered diffraction. The martensite fraction is increased as the Ni content increases, and it causes the reduction effective grain size. When compare the boundary distributions of both as-quenched and tempered specimens, larger amounts of Σ11, Σ13, and Σ39 CSL boundaries were observed only in as-quenched model alloys. These boundaries were diminished by the tempering process. However, the peak of the Σ3 boundary was observed in both the as-quenched and tempered states. The frequency of Σ3 boundaries in the tempered samples is significantly increased as the Ni content increases, and it is closely related with the martensite fraction.
机译：本文旨在定量表征不同Ni含量的回火马氏体/贝氏体Ni-Cr-Mo钢的显微组织。尽管由于回火的下贝氏体和回火的马氏体的显微组织相似性，很难表征Ni-Cr-Mo低合金钢中的相分相，但可以通过淬火后的试样，通过连续三次测量铁素体来确定相分数。范围，扫描电子显微镜图像和电子反向散射衍射。随着Ni含量的增加，马氏体分数增加，并且其导致还原有效晶粒尺寸。当比较淬火和回火试样的边界分布时，仅在淬火模型合金中观察到大量的Σ11，Σ13和Σ39CSL边界。这些界限由于回火过程而减小。但是，在淬火和回火状态下都观察到Σ3边界的峰。随Ni含量的增加，回火样品中Σ3边界的频率显着增加，并且与马氏体含量密切相关。

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  • 来源
    《Metals and Materials International》 |2013年第1期|49-54|共6页
  • 作者

    Sang-Gyu Park; Ki-Hyoung Lee; Ki-Deuk Min; Min-Chul Kim; Bong-Sang Lee;

  • 作者单位

    Nuclear Materials Research Division Korea Atomic Energy Research Institute">(1);

    Nuclear Materials Research Division Korea Atomic Energy Research Institute">(1);

    Division of Material Science and Engineering Hanyang University">(2);

    Nuclear Materials Research Division Korea Atomic Energy Research Institute">(1);

    Nuclear Materials Research Division Korea Atomic Energy Research Institute">(1);

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