Work-Hardening of Al–Al3Ni Eutectic Composite in Stage II at Temperatures between 293 and 673 K

Yanagisawa Osamu, Yano Tetsuo, Sagahara Takayuki, Ohmori Masanobu

doi:10.2320/jinstmet1952.48.6_583

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Al-Al3Ni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
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-Al3Ni Eutectic Composites in Stage II in Temperatures between 293 K and 673 K
Work-Hardening of Al–Al3Ni Eutectic Composite in Stage II at Temperatures between 293 and 673 K

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Description

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. 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. 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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Transactions of the Japan Institute of Metals

Transactions of the Japan Institute of Metals 26 (3), 160-166, 1985

The Japan Institute of Metals

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Work-Hardening of Al–Al<SUB>3</SUB>Ni Eutectic Composite in Stage II at Temperatures between 293 and 673 K