中文摘要：

韧性和金属性的材料的电的电导率相反地与他们的力量被相关，导致都同时优化三的一个困难。我们用半固体挤出设计 Al-Sc-Zr-based 合金与优秀电的电导率一起产出在力量和韧性之间的一宗好交易。有 3mm 的一条直径的 Al-0.35Sc-0.2Zr 电线展出了最好联合的性质：210 的张力的力量 ??????? ? 摲 ??飔？？

英文摘要：

Ductility and electrical conductivity of metallic materials are inversely correlated with their strength,resulting in a difficulty of optimizing all three simultaneously. We design an Al-Sc-Zr-based alloy using semisolid extrusion to yield a good trade-off between strength and ductility along with excellent electrical conductivity. The Al-0.35Sc-0.2Zr wire with a diameter of 3 mm exhibited the best combined properties： a tensile strength of 210 ± 2 MPa, elongation of 7.6% ± 0.5%, and an electrical conductivity of 34.9 ± 0.05 MS/m. The average particle size of nanosized Al3（Sc, Zr） precipitates increased from 6.5 ± 0.5 nm to 25.0 ± 0.5 nm as the aging time increased from 1 h to 96 h at 380 °C, accompanied by the corresponding volume fraction variation from（6.2 ± 0.1） × 10~（-4） to（3.7 ± 0.1） × 10~（-3）. As proved by transmission electron microscopy observation, the high strength originates from the effective blockage of dislocation motion by numerous nanosized Al3（Sc, Zr） precipitates whilst both electrical conductivity and ductility remain at a high level due to the coherent precipitates possessing an extremely low electrical resistivity.