亜鉛単結晶の疲労強度と静的強度

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書誌事項

タイトル別名
  • Fatigue Strength and Static Strength in Zinc Single Crystals
  • アエンタンケッショウ ノ ヒロウ キョウド ト セイテキ キョウド

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抄録

For zinc single crystals with the [0001],[10\={1}0] and [11\={2}0] orientations, the fatigue strength as determined from the cantilever rotating bending tests has been compared with the static strength determined from the tensile tests. In [0001] crystals, the normal stress acting on the cleavage-fracture plane (0001) at the endurance limit, which is defined conveniently as the fracture stress at 107 cycles, is about a half of the normal fracture stress in the tensile test, but the resolved shear stress operating along the (0001)⟨11\={2}0⟩ direction at the endurance limit coincides with the critical resolved shear stress of the (0001) ⟨11\={2}0⟩ slip system in the tensile deformation. The latter relation also holds for the(0001)⟨11\={2}0⟩ slip, {11\={2}2}⟨\={1}\={1}23⟩ slip or {10\={1}2} twinning in fatigued [10\={1}0] and [11\={2}0] crystals. These findings indicate that the endurance limit, below which the fatigue failure does not occur, in zinc single crystals is determined by the critical resolved shear stress of the active slip or twinning system. It has also been found that the slope of the S-N curve depends on the easiness of plastic deformation of the crystal concerned.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 25 (10), 626-629, 1961

    公益社団法人 日本金属学会

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