Abstract High strength-ductility is the prerequisite requirement for the widely used steel wires in engineering applications. Traditional strengthening strategies on these wires are suffocated inevitably by strength-ductility trade-off dilemma. Recent emerging medium-entropy alloys (MEAs) usually exhibits excellent ductility but relatively lower strength. In this paper, a novel CoCrNi MEA wire with superior mechanical properties was successfully fabricated by heavily drawing process. The yield strength, ultimate tensile strength and elongation could reach 1.5 GPa, 1.8 GPa and 37.4% at liquid-nitrogen temperature, respectively. In-depth microstructure characterization indicates this superior strength-ductility derives from the synergy of dislocations, high-density twins and clear FCC-HCP phase transition.

中文翻译：

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优越的强度-延展性 CoCrNi 中熵合金丝

摘要 高强韧性是钢丝在工程应用中广泛应用的先决条件。这些线材的传统强化策略不可避免地受到强度-延展性权衡困境的阻碍。最近出现的中熵合金 (MEA) 通常表现出优异的延展性，但强度相对较低。在本文中，通过重拉工艺成功制造了一种具有优异机械性能的新型 CoCrNi MEA 线材。在液氮温度下屈服强度、极限抗拉强度和伸长率分别达到1.5 GPa、1.8 GPa和37.4%。深入的微观结构表征表明，这种优异的强度-延展性源于位错、高密度孪晶和清晰的 FCC-HCP 相变的协同作用。