TY - JOUR
T1 - Effects of processing paths on the microstructure, mechanical properties and electrical conductivity of dilute Al-Zr-Sc alloy conductive wires
AU - Fan, Siyue
AU - Li, Zhenhua
AU - Xiao, Wenlong
AU - Yan, Peng
AU - Feng, Jiawen
AU - Jiang, Qingwei
AU - Ma, Jing
AU - Gong, Yuqi
N1 - Publisher Copyright:
© 2024
PY - 2024/7/20
Y1 - 2024/7/20
N2 - 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 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.
AB - 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 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.
KW - Al-Zr-Sc alloy
KW - Electrical conductivity
KW - Heat resistance
KW - Mechanical properties
KW - Process optimization
UR - https://www.scopus.com/pages/publications/85183579594
U2 - 10.1016/j.jmst.2023.11.060
DO - 10.1016/j.jmst.2023.11.060
M3 - 文章
AN - SCOPUS:85183579594
SN - 1005-0302
VL - 188
SP - 202
EP - 215
JO - Journal of Materials Science and Technology
JF - Journal of Materials Science and Technology
ER -