銅単結晶のすべり摩擦にともなう大角粒界形成の結晶方位依存性  [in Japanese] Orientation Dependence of High-Angle Grain Boundary Formation during Sliding Wear in Copper Single Crystals  [in Japanese]

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Author(s)

    • 井野谷 潤一 INOTANI Junichi
    • 大阪市立大学大学院工学研究科機械物理系専攻 Department of Intelligent Materials Engineering, Faculty of Engineering, Graduate School of Engineering, Osaka City University
    • 兼子 佳久 [他] KANEKO Yoshihisa
    • 大阪市立大学大学院工学研究科機械物理系専攻 Department of Intelligent Materials Engineering, Faculty of Engineering, Graduate School of Engineering, Osaka City University
    • 橋本 敏 HASHIMOTO Satoshi
    • 大阪市立大学大学院工学研究科機械物理系専攻 Department of Intelligent Materials Engineering, Faculty of Engineering, Graduate School of Engineering, Osaka City University

Abstract

  Sliding wear tests were conducted on copper single crystals having (110) and (111) surface, and polycrystalline copper. Evolution of high-angle grain boundaries during the sliding wear was investigated by the electron backscatter diffraction (EBSD) technique. The high-angle grain boundaries, which were formed in the vicinity of the worn surface, could be classified into two kinds from their morphology: one is parallel to the worn surface (Type A high-angle boundary) and the other is a grain boundary surrounding an equiaxed fine grain (Type B high-angle boundary). At Type A high-angle boundaries, a rotational axis between adjoining grains was almost parallel to <i>z</i>-axis which is defined as the direction perpendicular to both wear direction and worn surface normal. Grain boundary character distribution of Type A boundaries was sensitive to crystallographic orientation of the <i>z</i>-axis. When the <i>z</i>-axis was <110>, orientation relationship of Σ33a had high frequency. On the other hand, high Σ31a frequency was obtained at the sliding wear occurring under <111> <i>z</i>-axis condition. It is concluded that the evolution of Type A boundaries was caused by lattice rotation induced by sliding wear. For Type B high-angle boundaries, fractions of low-Σ coincident site lattice (CSL) boundaries were high, and the frequency distribution of CSL boundaries was almost independent of wear direction and worn surface orientation. Unlike Type A boundaries, rotational axes at Type B boundaries showed no preferred orientation. These crystallographic features suggest that recrystallization is the most plausible origin for Type B boundary evolution. Consequently, the high-angle boundaries were produced probably by two different processes during sliding wear.<br>

Journal

  • Journal of the Japan Institute of Metals and Materials

    Journal of the Japan Institute of Metals and Materials 74(6), 384-391, 2010-06-01

    The Japan Institute of Metals and Materials

References:  11

Cited by:  1

Codes

  • NII Article ID (NAID)
    10026403054
  • NII NACSIS-CAT ID (NCID)
    AN00062446
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    00214876
  • NDL Article ID
    10691484
  • NDL Source Classification
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL Call No.
    Z17-314
  • Data Source
    CJP  CJPref  NDL  J-STAGE 
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