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Split and Shift of ε-martensite Peak in an X-ray Diffraction Profile during Hydrogen Desorption: A Geometric Effect of Atomic Sequence

机译:氢解吸过程中X射线衍射图中ε-马氏体峰的分裂和移位:原子序列的几何效应

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摘要

Cryogenic X-ray diffraction measurements demonstrated a split of the e-martensite peak at 193 K in a hydrogen-charged austenitic steel. Only the higher angle peak remained after aging at room temperature. This phenomenon can be interpreted by a change in the interstitial hydrogen position. Particularly, the motion of the leading partial involved in ε-martensitic transformation can move interstitial hydrogen from a tetrahedron to an octahedron site, expanding the lattice. Subsequently, the hydrogen can move back to the tetrahedron site, which relatively shrinks the lattice. The two different hydrogen positions cause the peak to split.
机译:低温X射线衍射测量表明,在充氢奥氏体钢中,马氏体峰在193 K处分裂。在室温下老化后仅保留较高的角度峰。这种现象可以通过间隙氢位置的变化来解释。特别地,参与ε马氏体转变的前导部分的运动可使间隙氢从四面体移动到八面体位置,从而扩展了晶格。随后,氢可以移回到四面体位置,这使晶格相对收缩。氢的两个不同位置导致峰分裂。

著录项

  • 来源
    《ISIJ international》 |2018年第9期|1745-1747|共3页
  • 作者单位

    Department of Mechanical Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395 Japan;

    Department of Mechanical Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395 Japan;

    Department of Mechanical Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395 Japan,Hydrogenious, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395 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

    hydrogen; martensitic transformation; lattice dilatation; X-ray diffraction; austenitic steel;

    机译:氢;马氏体转变晶格膨胀X射线衍射;奥氏体钢;

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