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我们曾经对AlZnMgCu合金的形变过程及拉伸形变规律进行过一些实验研究,为直接观察其形变断裂过程的特征,对退火和时效强化状态的合金,作了扫描电镜下的动态拉伸,分析了形变,裂纹成核及扩展过程和夹杂物的影响。试样化学成份:Zn5.1-6.1％、Mg2.6-3.0％、Cu1.2-2.0％、Cr0.16-0.3％,Si≤0.5％,F≤0.5％,Al余量。样品热处理,完全退火:加热至413～441℃,保温1小时,以每小时28℃的速度冷却至232±14℃,再保温3小时,水冷。时效强化:将完全退火试样于465℃保温20分钟,水淬,再135℃时效8
We have carried out some experimental research on AlZnMgCu alloy deformation process and tensile deformation, in order to directly observe the characteristics of the deformation and fracture process, the annealing and aging strengthened state alloy, under the scanning electron microscope dynamic tensile analysis Deformation, crack nucleation and expansion process and the impact of inclusions. Sample chemical composition: Zn5.1-6.1%, Mg2.6-3.0%, Cu1.2-2.0%, Cr0.16-0.3%, Si≤0.5%, F≤0.5%, Al balance. Sample heat treatment, complete annealing: heated to 413 ~ 441 ℃, incubated for 1 hour at 28 ℃ per hour cooling rate to 232 ± 14 ℃, then incubated for 3 hours, water-cooled. Aging enhancement: the sample is completely annealed at 465 ℃ for 20 minutes, water quenching, and then aging at 135 ℃ 8