Ａｌ‐Ｌｉ‐Ｃｕ‐Ｍｇ‐Ｚｒ合金の析出組織と延性に及ぼす予加工の影響

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  • Effect of thermomechanical treatment on the precipitation and the tensile properties of an Al-Li-Cu-Mg-Zr alloy.
  • Al Li Cu Mg Zr ゴウキン ノ セキシュツ ソシキ ト エンセイ

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抄録

Precipitation phenomena and mechanical properties in an Al-Li-Cu-Mg-Zr alloy after aging at 150-230°C for various periods were investigated by hardness measurement, tensile test and electron microscopy observation. The thermomechanical treatment have been utilized in order to improve poor ductility of Al-Li base alloys due to intense coplanar slip assosiated with δ' phase. 8 percent rolling reduction prior to aging encouraged the homogeneous precipitation of S' phase within grains, and the widespread presence of S' phase caused the significant improvement in ductility to dispense large planar slip and the increment of strength by additional strengthening effect. More improvement of ductility was not obtained under the condition of higher rolling reduction.

収録刊行物

  • 軽金属

    軽金属 39 (4), 269-274, 1989

    一般社団法人 軽金属学会

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