In magnesium alloys with aluminum as an alloying component, zirconium loses its grain refinement effect as a grain refiner. Instead of zirconium, Mg3N2 can be used, and promising results have already been obtained. However, the duration of action of Mg3N2 has not been elucidated yet. The aim of this work is therefore to determine the grain size of the AZ80 alloy as a function of the duration of action of Mg3N2 and thus the economically reasonable duration of use. It was found that the Mg3N2 reaches its full effect from 30 min after a complete remelting and does not lose this grain refinement effect even after 90 min. It thus proves to be a stable and reliable grain refiner. A grain size of 146.3 ± 10.3 µm was achieved. Furthermore, a minimum tensile strength of 205 MPa with a break elongation of 5.99% was achieved.

中文翻译：

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Mg3N2作为AZ80合金晶粒细化剂作用持续时间的研究

在以铝为合金成分的镁合金中，锆失去了作为晶粒细化剂的晶粒细化作用。可以使用 Mg3N2 代替锆，并且已经获得了有希望的结果。然而，Mg3N2 的作用持续时间尚未阐明。因此，这项工作的目的是确定 AZ80 合金的晶粒尺寸作为 Mg3N2 作用持续时间的函数，从而确定经济上合理的使用持续时间。结果发现，Mg3N2在完全重熔后30分钟后就达到其全部效果，并且即使在90分钟后也不会失去这种晶粒细化效果。因此，它被证明是一种稳定可靠的晶粒细化剂。晶粒尺寸达到 146.3 ± 10.3 µm。此外，最小拉伸强度为 205 MPa，断裂伸长率为 5.99%。