Abstract—

The effect of annealing conditions of the cold-rolled strip made of a new aluminum–magnesium alloy 1565ch, containing zinc and zirconium, on the evolution of the grain structure has been analyzed in this work. This material was recently developed by Russian scientists and has already been used in transport engineering, but has not yet been sufficiently studied. Recrystallization processes occurring in this alloy and their connection with intermetallic particles are of particular interest. This work is aimed at studying the effect of the temperature and annealing time on the grain size in the 1565ch alloy. The grain structure has been studied by optical microscopy, and the intermetallic particles have been studied by scanning electron microscopy. In addition, the phase composition of the 1565ch alloy has been calculated using Thermo-Calc software. The grain size after achieving the recrystallization threshold has been shown to be insensitive to the annealing time and directly depends only on the annealing temperature, which no longer has a noticeable effect after 350°C. The 1565ch alloy tends to recrystallization with involving coarse intermetallic particles of the second phase. These particles are Al₆(Mn, Fe) and Mg₂Si. In addition, the effect of fine intermetallic particles on the recrystallization process has been investigated. The dissolution and coagulation of the fine particles in this alloy provoke rapid recrystallization.

中文翻译：

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退火条件对铝镁合金冷轧带钢晶粒组织和金属间相演变的影响

摘要—

在这项工作中，分析了一种由含锌和锆的新型铝镁合金1565ch制成的冷轧带材的退火条件对晶粒组织演变的影响。这种材料是俄罗斯科学家最近开发的，已经在运输工程中使用，但尚未进行充分的研究。在这种合金中发生的重结晶过程以及它们与金属间颗粒的连接特别令人关注。这项工作旨在研究温度和退火时间对1565ch合金晶粒尺寸的影响。通过光学显微镜研究了晶粒结构，并且通过扫描电子显微镜研究了金属间颗粒。此外，已使用Thermo-Calc软件计算了1565ch合金的相组成。已经证明，达到再结晶阈值后的晶粒尺寸对退火时间不敏感，并且仅取决于退火温度，在350℃后，退火温度不再具有明显的作用。1565ch合金倾向于重结晶，其中包含第二相的粗大金属间化合物颗粒。这些颗粒是铝₆（Mn，Fe）和Mg ₂ Si。另外，已经研究了细金属间化合物对重结晶过程的影响。细小颗粒在该合金中的溶解和凝结会引起快速重结晶。