Abstract—

The effect of the new combined rolling–pressing technique of plastic deformation on the structure and mechanical properties of copper has been investigated in this work. The deformation was performed at room temperature and there were three cycles. Rolling–pressing technique was shown to significantly refine the structure of the commercial-purity copper. The strength of the copper workpieces increased by two times after three passes. The ultimate tensile strength and the yield strength increased from 235 to 482 MPa and from 198 to 405 MPa, respectively. The relative elongation and the relative reduction decreased by 8% and 7%, respectively. The ultrafine-grained structure with an average grain size of 2 μm was revealed to be stable to subsequent annealing up to 150°C.

中文翻译：

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ECAP轧制过程中铜的显微组织和力学性能的演变

摘要—

在这项工作中，已经研究了新的塑性变形联合压延技术对铜的结构和力学性能的影响。变形在室温下进行，存在三个循环。轧制技术被证明可以显着改善商业纯度铜的结构。经过三遍后，铜工件的强度提高了两倍。极限抗拉强度和屈服强度分别从235 MPa增加到482 MPa和从198 MPa增加到405 MPa。相对伸长率和相对减小率分别降低了8％和7％。结果表明，平均晶粒尺寸为2μm的超细晶粒结构在随后的高达150°C的退火中稳定。