Al-Mg固溶体の冷間圧延と焼なましによる比抵抗と強度の変化

抄録

The increase in resistivity with cold rolling up to 92% was measured for Al-Mg solid solutions having different Mg content. Starting from 1.7Ms or 34Ms holding at room temperature (RT) after 92% cold rolling, the decrease in resistivity by long period holding at RT and isochronal annealing up to 673K was also measured. Even for same reduction in thickness, as the Mg content becomes higher, the more lattice defects are introduced and then, the decrease in resistivity by annealing becomes larger with increasing Mg content. This is confirmed by the dependence of work hardening on the Mg content. Namely, the difference of the 0.2% proof stress between the cold rolled state and the annealed state is roughly proportional to the square root of the Mg content, and the resistivity increase due to dislocation density increased by cold rolling is proportional to the square of amount of work hardening.