Kopeček Jaromír, Bajtošová Lucia, Veřtát Petr, Šimek Daniel
FZU-Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, 18200 Prague, Czech Republic.
Department of Physics of Materials, Charles University in Prague, Ke Karlovu 5, 12116 Prague, Czech Republic.
Materials (Basel). 2023 Jul 28;16(15):5324. doi: 10.3390/ma16155324.
Copper generally exhibits high electrical conductivity but has poor mechanical properties. Although alloying can improve the latter characteristic, it usually leads to a decrease in electrical conductivity. To address this issue, a promising approach is to enhance the performance of copper while maintaining high electrical conductivity through optimized deformation processing, which refines the structure and increases mechanical properties. This paper focuses on assessing the effects of rotary swaging, a form of deformation processing, on microstructures and substructures of electroconductive copper bars. This analysis is complemented by experimental measurements of electrical conductivity. The results demonstrate that gradual swaging, i.e., applying different swaging ratios, influences the structure-forming processes and consequently affects the electrical conductivity. The increased electrical conductivity was found to be associated with the elongation of the grains in the direction of the electron movement.
铜通常具有高电导率，但机械性能较差。虽然合金化可以改善后一种特性，但通常会导致电导率下降。为了解决这个问题，一种有前景的方法是通过优化变形加工来提高铜的性能，同时保持高电导率，这种加工可以细化结构并提高机械性能。本文重点评估旋转锻造（一种变形加工形式）对导电铜棒微观结构和亚结构的影响。通过电导率的实验测量对这一分析进行补充。结果表明，逐步锻造，即应用不同的锻造比，会影响结构形成过程，从而影响电导率。发现电导率的增加与晶粒在电子移动方向上的伸长有关。
