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

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

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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 perfor-mance changes of Al-0.2Zr-0.06Sc alloy wires produced by three processing paths are investigated.Re-sults 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 dy-namic precipitation of Al3Sc 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 Al3Sc 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.

Al-Zr-Sc alloyProcess optimizationMechanical propertiesElectrical conductivityHeat resistance

Siyue Fan、Zhenhua Li、Wenlong Xiao、Peng Yan、Jiawen Feng、Qingwei Jiang、Jing Ma、Yuqi Gong

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School of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China

Yunnan Innovation Institute of Beihang University,Kunming 650093,China

School of Materials Science and Engineering Beihang University,Beijing 100191,China

Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China

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Key Project of Research and Development in Yunnan ProvinceKey Project of Research and Development in Yunnan ProvinceKey Project of Yunnan Fundamental ResearchKunming University of Science and Technology Analysis and Testing Fund

202103AN080001-002202202AG050007-4202101AS0700172022M20202230013

2024

10.1016/j.jmst.2023.11.060

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.188(21)
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