A group of aluminium alloys with 1XXX designation is often called the pure aluminium group, because it contains a minimum of 99.0 mas. % Al. Due to the excellent corrosion resistance, high thermal and electrical conductivity, and excellent formability, it has wide application, especially for packaging, foils, electrical conductors and space applications.
The main purpose of the diploma work was to determine the effect of various alloying additives and homogenization time of the melt on formation of iron phases. We made aluminium alloy from Al99,7 and additives of iron. The iron additives were in a form of tablets and briquettes. In our research: simple thermal analysis (ETA), X-ray fluorescence analysis (XRF), differential scanning calorimetry (DSC), optical microscopy and scanning electron microscope (SEM) were used.
For the manufacture of the alloy we used the addition of iron in a form of tablets (AlFe75) and briquettes (AlFe45). The results of analyses showed faster dissolution of iron in the form of tablets, as well as solidification of iron phase Al13Fe4 at higher temperatures. According to the results of DSC analyse, we found out, that addition of iron in the form of briquettes with increasing homogenization time, increase heating and solidification enthalpy, as well as proportion of microstructural phases. The influence of melt homogenization time was observed in alternation of morphology of Al13Fe4 iron phase, whereby, during longer periods of homogenization, the shape of the phase changes.
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