Abstract

The effect of the cold rolling reduction ratio (ε_h) on the microstructure and the complex of mechanical and technological properties of cold-rolled sheets from aluminum alloy V-1579 of the Al–Mg–Sc system has been studied. The influence of the final annealing temperature of sheets rolled with different reduction ratios has been examined as well. The character of plastic anisotropy has been found to change slightly with an increase in ε_h during cold rolling; an increase in tensile strength and yield strength with a decrease in relative elongation is observed. In this case, the anisotropy of the ultimate strength and yield strength is nearly absent. With an increase in the reduction ratio to 30–40%, the anisotropy of the relative elongation increases: the relative elongation in the rolling direction decreases more rapidly. However, after rolling with ε_h > 50%, the elongation anisotropy almost disappears. Regardless of the annealing temperature, samples rolled with a higher reduction ratio have higher strength characteristics. With an increase in the annealing temperature, the ultimate strength and yield strength decrease, while the relative elongation increases. In this case, softening with the annealing temperature occurs more intensely for samples rolled with a lower reduction. For all analyzed regimes, the character of the distribution of anisotropy indices in the sheet plane does not decrease after annealing and corresponds to the deformation type of textures. Moreover, the in-plane anisotropy coefficient decreases after annealing in comparison with a cold-rolled sample. At the same time, the technological properties of samples rolled with a higher degree of deformation are higher after annealing than those of samples rolled with a lower reduction regardless of the annealing temperature.

中文翻译：

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冷轧压下率和最终退火温度对Al-Mg-Sc合金薄板性能和组织的影响

摘要

研究了冷轧压下率 (ε _h ) 对 Al-Mg-Sc 系铝合金 V-1579 冷轧薄板的显微组织和力学工艺性能的影响。还研究了以不同压下率轧制的薄板最终退火温度的影响。已发现塑性各向异性的特征随着 ε _{h的增加而略有变化}冷轧时；观察到抗拉强度和屈服强度随着相对伸长率的降低而增加。在这种情况下，极限强度和屈服强度的各向异性几乎不存在。随着压下率增加到30-40%，相对伸长率的各向异性增加：轧制方向的相对伸长率下降得更快。然而，在用 ε _h滚动后> 50%，伸长率各向异性几乎消失。无论退火温度如何，以较高压下率轧制的样品具有较高的强度特性。随着退火温度的升高，极限强度和屈服强度降低，而相对伸长率增加。在这种情况下，对于以较低压下率轧制的样品，随着退火温度的软化发生得更强烈。对于所有分析的方案，板平面中各向异性指数的分布特征在退火后没有减少，并且对应于织构的变形类型。此外，与冷轧样品相比，退火后的面内各向异性系数降低。同时，