The thermal stability of a fine-grained aluminum wire made of Al–Mg–Zr–Sc(Yb) alloys with different zirconium and scandium (ytterbium) contents is studied. Samples are produced by induction casting and subsequent cold working by drawing. The structure and properties of fine-grained the Al–0.6Mg–Zr–Sc alloys are shown to exhibit high thermal stability due to preliminary (before drawing) annealing at 320°C for 2 h, resulting in the precipitation of intermetallic Al₃(Sc _x Zr_{1 – x} ) particles. A fine-grained homogeneous structure with an average grain size of 2.4–2.8 μm and a microhardness of 405–440 MPa is found to be retained in the Al–0.6Mg–Zr–Sc alloys after prolonged annealing at 400°C for 100 h. A fine-grained magnesium-free Al–0.33Zr–0.16Yb ytterbium alloy has a low hardness and low thermal stability. The average grain size in it after annealing at 400°C for 100 h is 4.1–4.8 μm.

中文翻译：

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细晶粒铝导体合金Al–Mg–Zr–Sc（Yb）的结构和力学性能的热稳定性

研究了由具有不同锆和scan（））含量的Al-Mg-Zr-Sc（Yb）合金制成的细晶粒铝线的热稳定性。样品通过感应铸造生产，随后通过拉拔进行冷加工。由于在320°C下进行了2h的初步退火（拉拔），导致细小晶粒Al-0.6Mg-Zr-Sc合金的结构和性能显示出高的热稳定性，导致金属间Al ₃（ Sc _x Zr _{1 – x} ） 粒子。经过长时间在400°C退火100 h后，Al-0.6Mg-Zr-Sc合金中保留了平均晶粒尺寸为2.4-2.8μm，显微硬度为405-440 MPa的细晶粒均匀组织。 。细晶粒的无镁Al–0.33Zr–0.16Yb alloy合金硬度低且热稳定性低。在400°C退火100 h后，其平均晶粒尺寸为4.1–4.8μm。