マグネシウム単結晶の塑性におよぼす温度と方位の影響

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タイトル別名
  • Temperature and Orientation Dependence of the Plasticity of Magnesium Single Crystals
  • マグネシウムタンケッショウ ノ ソセイ ニ オヨボス オンド ト ホウイ ノ エイキョウ

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抄録

Plastic deformation in magnesium single crystals was investigated by tensile test at various temperatures (from room temperature to 400°C). The results obtained were as follows: (1) The critical resolved shear stress for basal slip is about 80 g/mm2 at room temperature, and about 60 g/mm2 at 200° and 400°C. (2) {10\bar12} twins occur in crystals for which χ\gtrsim57° at room temperature and in crystal for which χ=70° at 400°C, where χ is the angle between the basal plane and the stress axis. (3) {10\bar11}⟨11\bar20⟩ pyramidal slip occurs above 220°C, while any nonbasal slip is observed below 200°C. (4) The ductility develops remarkably above 250°C by the aid of the pyramidal slip. (5) In crystals for which χ\gtrsim35°, fracturing occurs nearly along the basal plane, while it occurs on {10\bar11} plane or other high index planes in crystals for which χ=5∼12°, below 230°C. (6) Above 250°C, fracturing occurs after necking caused by the pyramidal slip. (7) Crystals for which χ\gtrsim35° remarkably hardens by much kinking and bending at room temperature, while these kinking and bending are not observed at 400°C.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 23 (11), 649-652, 1959

    公益社団法人 日本金属学会

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