Abstract

The effect of the annealing temperature on the specific electrical resistance, hardness, and structure of Al–Cu–Mn alloys containing 2 wt % Mn and up to 3 wt % Cu in the as-cast and cold-rolled states has been studied using experimental and computational methods. It has been demonstrated that the best complex of mechanical properties is attained in the cold-rolled sheets containing 2–3 wt % Cu after annealing at 400°C due to the formation of more than 9 vol % of Al₂₀Cu₂Mn₃ phase dispersoids with an average size of less than 100 nm in their structure. Such a structure provides higher thermal stability in comparison with 1201 grade alloy (of similar alloying system 0.32 Mn, 5.86 Cu, 0.07 Fe, 0.08 Si, 0.08 Zr wt %) hardened by quenching and aging.

中文翻译：

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含有2 wt％Mn的热稳定锻造铝合金中铜浓度的证实

摘要

通过实验研究了退火温度对铸态和冷轧状态下含2 wt％Mn和最多3 wt％Cu的Al-Cu-Mn合金的比电阻，硬度和组织的影响。和计算方法。业已证明，由于形成的Al ₂₀ Cu ₂ Mn ₃相超过9％（体积），在400°C退火后，含有2-3 wt％Cu的冷轧薄板可获得最佳的机械性能。分散体的平均尺寸小于100 nm。与通过淬火和时效硬化的1201级合金（类似合金系统的0.32 Mn，5.86 Cu，0.07 Fe，0.08 Si，0.08 Zr wt％）相比，这种结构提供了更高的热稳定性。