The influence of the wire drawing process on the microstructure, mechanical properties and electrical conductivity/resistivity of 99.9% aluminium and alloys of aluminium obtained by adding 0.2 wt% of Mg, Co and Ce to technically pure aluminium was investigated. The purpose of the study was to obtain a material after the drawing process with an ultimate tensile strength (UTS) above 170 MPa, a conductivity higher than 60.4% according to the International Annealed Copper Standard (IACS), and the highest possible thermal stability. The study showed that an increase in strain leads to an increase in material strength properties and a decrease in electrical conductivity, but different additives have different effects on these properties. After wire drawing, 99.9% aluminium exhibits UTS at a level of 200 MPa and 61.1% IACS conductivity. The UTS and the conductivity of alloys with the addition of 0.2 wt% of Mg, Co, Ce in similar conditions are 252 MPa/59.1%, 203 MPa/60.5% and 184 MPa/60.9%, respectively. Microstructure was analysed using scanning electron microscopy to determine changes which occur during the wire drawing process. The analysis also included orientation imaging microscopy by means of electron backscattered diffraction, used to evaluate grain size and local texture. A thermal stability study was also performed to investigate the behaviour of material exposed to elevated temperatures. A decrease in the UTS of 16.8% was found during the thermal stability test for Al99.9%, while additions of 0.2% Mg, Co and Ce resulted in decreases of 8.1%, 12.8% and 9.1%, respectively. An improvement in thermal stability for the alloy with magnesium was identified by the solute drag mechanism. For alloys with the addition of Co and Ce, better thermal stability resulted from the appearance of new phases: Al_9.02Co_1.51Fe_0.47 and Al₄Ce, respectively. Finally, the potential application of these materials for electric cables is analysed and discussed.

研究了拉丝工艺对99.9％的铝以及通过向技术纯铝中添加0.2 wt％的Mg，Co和Ce所获得的铝合金的组织，力学性能和电导率/电阻率的影响。研究的目的是在拉伸过程后获得一种材料，其极限抗拉强度（UTS）高于170 MPa，根据国际退火铜标准（IACS）的电导率高于60.4％，并且具有最高的热稳定性。研究表明，应变的增加导致材料强度特性的增加和导电性的降低，但是不同的添加剂对这些特性的影响不同。拉丝后，99.9％的铝表现出200 MPa的UTS和61.1％的IACS电导率。在类似条件下添加0.2 wt％Mg，Co，Ce的合金的UTS和电导率分别为252 MPa / 59.1％，203 MPa / 60.5％和184 MPa / 60.9％。使用扫描电子显微镜分析微观结构，以确定拉丝过程中发生的变化。分析还包括通过电子反向散射衍射进行取向成像显微镜，用于评估晶粒尺寸和局部织构。还进行了热稳定性研究，以研究暴露于高温下的材料的行为。在Al99.9％的热稳定性测试过程中，UTS降低了16.8％，而Mg，Co和Ce的添加量为0.2％，分别降低了8.1％，12.8％和9.1％。通过溶质拖曳机制可以确定含镁合金的热稳定性有所提高。对于添加了Co和Ce的合金，新相的出现可提高热稳定性：Al_9.02 Co _1.51 Fe _0.47和Al ₄ Ce。最后，分析和讨论了这些材料在电缆中的潜在应用。