Iron is one of the unwanted impurities in Al-Si alloys owing to its detrimental influence on the ductility. This work deals with developing a new Al-13Si alloy with high Fe concentration, without significant decrease in its ductility. The formation of the detrimental Fe-rich intermetallics was controlled with the addition of Ni with subsequent heat treatment. Tensile testing, electron microscopy and fractography studies conducted on the alloys confirmed that the detrimental effect of Fe can be suppressed through the evolution of Ni containing Fe-rich intermetallics. Fractography studies confirmed that the heat-treated alloys containing Ni have better ductility than their as-cast counterparts.

铁是铝硅合金中不需要的杂质之一，因为它对延展性有不利影响。这项工作涉及开发一种新的具有高 Fe 浓度的 Al-13Si 合金，而其延展性没有显着降低。通过添加 Ni 和随后的热处理来控制有害的富铁金属间化合物的形成。对合金进行的拉伸测试、电子显微镜和断口研究证实，可以通过含 Ni 的富铁金属间化合物的演变来抑制 Fe 的不利影响。断口研究证实，热处理后的含 Ni 合金比铸态合金具有更好的延展性。