The solidification microstructures formed in a model 6082 alloy with 0.2–1.0 wt % Fe were examined under different cooling rates and the effects of 0.5 wt % Mn and Al–5Ti–1B grain refiner addition investigated. The results were compared against Thermo-Calc, differential scanning calorimetry (DSC) and cooling curve analysis. Fe promotes primary-Al grain refinement from growth restriction and constitutional undercooling effects but increases detrimental β–(Al₉Fe₂Si₂) intermetallic. Mn contributes to primary-Al grain refinement from growth restriction and promotes the formation of α–Al₁₅(Fe,Mn)₃Si₂ at the expense of increased intermetallic content. Al–5Ti–1B inoculation not only produces the strongest refinement of primary-Al grains but also refines the Fe-intermetallics by enhancing their nucleation and restricting their growth volume in the interdendritic liquid pockets.

在不同冷却速率下检查了在0.282-1.0 wt％Fe的型号6082合金中形成的凝固组织，并研究了添加0.5 wt％Mn和Al-5Ti-1B晶粒细化剂的影响。将结果与Thermo-Calc，差示扫描量热法（DSC）和冷却曲线分析进行了比较。Fe促进了生长限制和组织过冷效应的初生Al晶粒细化，但增加了有害的β–（Al ₉ Fe ₂ Si ₂）金属间化合物。锰有助于从生长受限初级铝晶粒细化和促进的α-Al的形成₁₅（铁，锰）₃的Si ₂以增加金属间含量为代价。Al-5Ti-1B接种不仅能产生最强的初生Al晶粒细化，而且还能通过增强其成核作用并限制其在树枝状晶间液穴中的生长量来细化Fe-金属间化合物。