Abstract A Cu alloy with high strength and conductivity, which are trade off characteristics, was developed using discontinuous precipitates as the hardening agent. The scanning electron microscopy and transmission electron microscopy results showed that a considerable internal strain and geometrically necessary dislocations were generated in the alloy because of discontinuous precipitation. Furthermore, nanotwins, which are rarely observed in cold-drawn Cu–Ni–Si alloys, were observed in the alloy. Since nanotwins show little effect on the electrical resistivity of Cu alloys while effectively interfering with the dislocation movement, they are one of the key factors endowing Cu alloys with the trade-off characteristics of high strength and conductivity.

中文翻译：

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高强度高电导冷拔Cu-Ni-Si合金的显微组织表征

摘要 以不连续的析出物为硬化剂，研制了一种强度高、导电率高的铜合金，这是一种折衷特性。扫描电镜和透射电镜结果表明，由于不连续沉淀，合金中产生了相当大的内部应变和几何上必要的位错。此外，在合金中观察到在冷拔 Cu-Ni-Si 合金中很少观察到的纳米孪晶。由于纳米孪晶对Cu合金的电阻率影响很小，同时有效地干扰了位错运动，因此它们是赋予Cu合金高强度和高导电性权衡特性的关键因素之一。