چكيده به لاتين
It is a good choice for the packaging, micro-electric and disposable containers industry. The purpose of this study is to investigate the effect of heat treatment and rolling on the microstructure and tensile behavior of the 8006 aluminum alloy produced by twin roll casting method. Therefore, the prepared specimens were reduced from 8 mm to 0.06 mm by cold rolling in three different processes during 9 passes. Thus, the sample in the first process was 8 mm thickness, in the second process after a rolling pass, in 4.5 mm thickness and in the third process after two rolling passes in 3.5 mm thick under heat treatment (homogenization and annealing) at 540 ° C for 8 h. The microstructure of the samples was analyzed by optical and scanning electron microscopy and the tensile properties were analyzed by tensile test. Microstructural studies showed that after the heat treatment, almost spherical intermetallic compounds were formed in the second process compared to the other two processes, and its elongation increased significantly. The samples were annealed in the temperature range of 250 to 400 ° C in order to obtain the best tensile behavior of the foil at a final thickness of 0.06 mm. After annealing at 330 ° C, respectively the percentage of elongation in processes 1, 2 and 3 increased by 50%, 81% and 66%. In the case of foils, the microstructure contained a relatively uniform distribution of AlFeMn intermetallic particles, which in some areas were fragile and relatively coarse, which This can cause foil failure due to the stress concentration. It was also observed that in the microstructure of the process two sample with a thickness of 0.06 mm, intermetallics were distributed more finely and uniformly compared to other processes. The differences in microstructure characteristics such as grain size, distribution, size of intermetallic compounds and their morphology have a significant influence on the elongation of the samples.
