Effects of processing paths on the microstructure, mechanical properties and electrical conductivity of dilute Al-Zr-Sc alloy conductive wires

被引：18

作者：

Fan, Siyue ^{[1
,2
]}

Li, Zhenhua ^{[1
]}

Xiao, Wenlong ^{[2
,3
]}

Yan, Peng ^{[2
,4
]}

Feng, Jiawen ^{[3
]}

Jiang, Qingwei ^{[1
]}

Ma, Jing ^{[1
]}

Gong, Yuqi ^{[1
]}

机构：

[1] Kunming Univ Sci & Technol, Sch Mat Sci & Engn, Kunming 650093, Peoples R China

[2] Beihang Univ, Yunnan Innovat Inst, Kunming 650093, Peoples R China

[3] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China

[4] Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2024年 / 188卷

关键词：

Al-Zr-Sc alloy; Process optimization; Mechanical properties; Electrical conductivity; Heat resistance; ALUMINUM-ALLOYS; YIELD STRENGTH; SI; RESISTIVITY; EVOLUTION; KINETICS; ER;

D O I：

10.1016/j.jmst.2023.11.060

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Understanding and clarifying the evolution of microstructure and performance of Al-Zr-Sc alloy wires during processing paths is a crucial issue in developing heat-resistant conductors with high strength and high electrical conductivity (EC). In this study, the microstructure evolution and corresponding performance changes of Al-0.2Zr-0.06Sc alloy wires produced by three processing paths are investigated. Results indicate that ageing treatment + hot extrusion + cold drawing processing path can produce the highest strength Al-Zr-Sc wires attributed to favorable interactions among precipitation strengthening of Al3 (Zr,Sc) phases, grain boundary strengthening and dislocation strengthening. High EC is attained by the hot extrusion + ageing treatment + cold drawing processing path, which reveals the importance of dynamic precipitation of Al3 Sc phases during hot extrusion and further precipitation of solute atoms during ageing treatment for improving the EC. The processing path using hot extrusion + cold drawing + ageing treatment achieves the highest EC of the Al-Zr-Sc wire, but the strength decreases significantly due to the loss of dislocation strengthening. Additionally, the pinning effect of Al3 Sc and Al3 (Zr,Sc) ensures good heat resistance of Al-Zr-Sc wires. These results provide guidance for the process design of Al-Zr-Sc wires with variable combinations of strength and EC. (c) 2024 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

引用

页码：202 / 215

页数：14

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