The effects of the Mg/Si ratio and aging treatment on the strength and electrical conductivity of Al–Mg–Si 6201 conductor alloys were investigated. Four experimental alloys with different Mg/Si ratios of 2, 1.5, 1, and 0.86 and with a constant Mg level of 0.65 wt% were prepared. It was revealed that excessive Si (a low Mg/Si ratio) increased the peak strength, while the corresponding electrical conductivity decreased. To fulfill the minimum required electrical conductivity (52.5% IACS), the alloys with low Mg/Si ratios required a longer aging time after peak aging to improve electrical conductivity. The alloy with an Mg/Si ratio of ~1 was the best candidate, exhibiting the highest strength up to 54% IACS. On the high end of electrical conductivity (54–56% IACS), the alloy with an Mg/Si ratio of ~1.5 provides a better compromise between strength and electrical conductivity. Furthermore, the strengthening mechanisms and the factors influencing electrical conductivity were discussed for further optimization.

中文翻译：

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不同Mg/Si比的Al-Mg-Si 6201合金力学性能和电导率的优化

研究了 Mg/Si 比和时效处理对 Al-Mg-Si 6201 导体合金的强度和电导率的影响。制备了具有 2、1.5、1 和 0.86 的不同 Mg/Si 比和 0.65 wt% 的恒定 Mg 水平的四种实验合金。结果表明，过量的 Si（低 Mg/Si 比）增加了峰值强度，而相应的电导率降低。为了满足最低要求的电导率 (52.5% IACS)，具有低 Mg/Si 比的合金在峰值时效后需要更长的时效时间以提高电导率。Mg/Si 比率为~1 的合金是最佳候选者，其强度最高可达 54% IACS。在电导率的高端 (54–56% IACS)，合金的 Mg/Si 比为 ~1。5 在强度和导电性之间提供了更好的折衷。此外，还讨论了强化机制和影响电导率的因素，以进一步优化。