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首页> 外文会议>2006 BIMW >Microstructural Evolvement of Al-1.5Si-1.1Mg-0.5Cu Alloy Ingot During Homogenization Treatment
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Microstructural Evolvement of Al-1.5Si-1.1Mg-0.5Cu Alloy Ingot During Homogenization Treatment

机译：Al-1.5Si-1.1Mg-0.5Cu合金锭均质化处理过程中的组织演变

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摘要

The kinds, morphologies and distributions, enclosed the micro-structural evolvement of Al-1.5Si-1.1Mg-O.5Cu alloy during homogenization treatment were investigated by means of optical microscopy, XRD, SEM/EDS and TEM/EDS. The results show that there were mainly three kinds of morphologically distinct constituents in as-cast Al-1.5Si-1.1Mg-0.5Cu alloy for automotive panels, such as coarse Mg_2Si and Al_8(FeMn)_2Si, and multiphase eutectic structure consisted of AlMgSiFeCu elements, except the α-Al matrix phase. The coarse Mg_2Si and Al_8(FeMn)_2Si were distributed in the α-Al interdentritic regions or at grain boundaries, the former sometimes appears more obvious eutectic characteristics than the later one. The multiphase eutectic products distributed both inside grains with agglomerate aspects and along the a-Al interdentritic regions or at grain boundaries, which is contained with Si and Al_2Cu. Coarse binary eutectic structure Mg_2Si partly dissolved into matrix and the eutectic characteristics disappeared, whereas Al_8(FeMn)_2Si changed a little during homogenization. Agglomerate multi-eutectic structures were non-equilibrium products, some of them fully dissolved into matrix and the others partially dissolved and left the discrete blocky Si behind after homogenization.
机译：通过光学显微镜，XRD，SEM / EDS和TEM / EDS研究了Al-1.5Si-1.1Mg-O.5Cu合金在均质化处理过程中的种类，形貌和分布，以及微观结构的演变。结果表明，汽车板铸态Al-1.5Si-1.1Mg-0.5Cu合金中主要存在三种形态上明显不同的成分：粗Mg_2Si和Al_8（FeMn）_2Si，而AlMgSiFeCu组成的多相共晶组织除α-Al基体相以外的元素。粗大的Mg_2Si和Al_8（FeMn）_2Si分布在α-Al的中间晶界或晶界处，前者有时表现出比后者更明显的共晶特性。多相共晶产物既分布在具有凝聚态的晶粒内部，又沿着a-Al的枝晶区域或在晶界分布，并包含在Si和Al_2Cu中。粗大的二元共晶结构Mg_2Si部分溶解在基体中，共晶特性消失，而Al_8（FeMn）_2Si在均质化过程中变化不大。团聚的多共晶结构是不平衡的产物，其中一些完全溶解在基质中，另一些部分溶解，并且在均质化后留下离散的块状硅。

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