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以实验室制备的玻璃包覆纯铜微丝为研究对象,对玻璃包覆纯铜微丝及去除包覆层的纯铜芯丝进行了力学性能评价和断口形貌分析.结果表明:外径45μm、包覆层厚度7.5μm和外径27μm、包覆层厚度6.0μm的玻璃包覆纯铜微丝极限拉伸载荷分别为0.268N和0.237N;纯铜芯丝的拉伸应力应变曲线表现出较低的加工硬化率,屈服强度与抗拉强度比值在0.75以上;纯铜芯丝抗拉强度随直径的减小而增大;直径10μm芯丝的平均抗拉强度可达547.9 MPa,延伸率约为2.5%;芯丝断裂模式为滑移延伸断裂.
The glass-coated pure copper microfilament prepared by laboratory was used as the research object to evaluate the mechanical properties and the fracture surface morphology of glass-coated pure copper microfilament and pure copper core with the coating removed.The results showed that the outer diameter 45μm, 7.5μm coating thickness and 27μm outer diameter, and the coating thickness of 6.0μm were 0.268N and 0.237N, respectively. The tensile stress-strain curves of pure copper core filaments A lower work hardening rate, the ratio of yield strength to tensile strength of 0.75 or more; tensile strength of pure copper core wire increases with decreasing diameter; the average tensile strength of 10μm diameter core wire up to 547.9 MPa, extending Rate of about 2.5%; core wire fracture mode for the slip extension fracture.