In this study, different contents (0.0, 0.1, 0.2, and 0.4 wt.%) of Zr₅₅Cu₃₀Al₁₀Ni₅ amorphous alloys (Zr-AA) are used to manipulate hypereutectic Al-Si alloys. The edge-to-edge model shows that there is a perfect lattice matching between the crystallized phases and α-Al and Si phases. The thermal analysis of solidification behavior of hypereutectic Al-Si alloys unmanipulated and manipulated by Zr-AA, indicates that the addition of Zr-AA greatly promotes the nucleation of primary Si and significantly accelerates the process of eutectic reaction. When manipulated by the optimal content of 0.2 wt.% Zr-AA, the sizes of α-Al dendrites and primary Si decrease from 212.46 μm and 19.24 μm to 143.39 μm and 16.47 μm, respectively. The eutectic Si changes from needle-like to rod-like and exhibits a mean size decrease from 20.21 μm to 11.69 μm. Meanwhile, alloys exhibit ultimate tensile strength of 362 MPa and fraction strain of 2.21% after 0.2 wt.% Zr-AA manipulation, which are 23% and 37% higher than those of the unmanipulated alloy (295 MPa and 1.61%). The strengthening mechanisms of hypereutectic Al-Si alloys manipulated by in situ nanocrystals crystallized in the melt are mainly attributed to the fine grain strengthening effect and precipitation strengthening effect. The increase in plasticity is due to the refinement and morphology improvement of Si phases.

在这项研究中，Zr ₅₅ Cu ₃₀ Al ₁₀ Ni _5的含量不同（0.0、0.1、0.2和0.4 wt。％）非晶合金（Zr-AA）用于处理过共晶Al-Si合金。边到边的模型表明，在结晶相与α-Al和Si相之间存在完美的晶格匹配。对未经Zr-AA操纵的过共晶Al-Si合金凝固行为的热分析表明，Zr-AA的添加极大地促进了初生Si的成核，并显着加速了共晶反应过程。当通过最佳含量0.2 wt。％Zr-AA进行操作时，α-Al树枝状晶体和原生Si的尺寸分别从212.46μm和19.24μm减小到143.39μm和16.47μm。共晶Si从针状变为棒状，并且平均尺寸从20.21μm减小至11.69μm。同时，合金的极限抗拉强度为362 MPa，分数应变为2。在0.2 wt。％的Zr-AA处理后为21％，比未处理的合金（295 MPa和1.61％）分别高23％和37％。熔体中原位形成的纳米晶对过共晶Al-Si合金的强化机制主要归因于细晶粒强化作用和析出强化作用。可塑性的增加归因于Si相的细化和形态改善。