Al-Al<SUB>3</SUB>Ni共晶系複合材料の293 K∼673 K におけるStage IIの加工硬化挙動

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タイトル別名
  • Work-Hardening of Al–Al<SUB>3</SUB>Ni Eutectic Composite in Stage II at Temperatures between 293 and 673 K
  • Al-Al3Ni共晶系複合材料の293K～673KにおけるStage2の加工硬化挙動
  • Al Al3Ni キョウショウケイ フクゴウ ザイリョウ ノ 293K 673
  • Work-Hardening of Al-Al<SUB>3</SUB>Ni Eutectic Composites in Stage II in Temperatures between 293 K and 673 K
  • Work-Hardening of Al&ndash;Al<SUB>3</SUB>Ni Eutectic Composite in Stage II at Temperatures between 293 and 673 K

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Work-hardening behavior of Al–Al3Ni eutectic composite in Stage II was investigated at various temperatures through observation of tensile deformation and the Bauschinger effect.<BR>The work hardening rate of this material in stage II at temperatures from 293 to 673 K, which was measured by a simple tensile test, decreases with rising temperature. Even at elevated temperatures the contribution of elastic modulus of Al3Ni fibers to the strain hardening rate is predominant. The matrix of this composite shows a linear work hardening at temperatures from 293 to 673 K, but its contribution to the strain hardening rate of composite is very small.<BR>The mean internal stress and the reversible stress of this composite, obtained by a cyclic tensile loading-unloading test, are consistent with the elastic stress component of the fibers and the reversible stress in the matrix, respectively. This result suggests that the Bauschinger effect in the matrix is very small, even if it exists, and the stress causing the Bauschinger effect is predominantly the elastic component of fibers.

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