Abstract
The aim of the presented research was to study the influence of Cr, Co, Ni, and Cu additions on the formation of quasicrystalline particles in the 94Al-6Mn base alloy during casting at intermediate cooling rates. Based on the obtained results, Cu and Ni enhance quasicrystalline phase nucleation compared to the unmodified binary composition. In the case of Cu addition, formation of a quasicrystalline phase takes place along whole thickness of the prepared casting, but its fraction and morphology depends on the cooling rates present in different parts of the sample. Based on the previous works on the beneficial effect of Fe addition, a quaternary alloy containing both Fe and Cu was prepared to evaluate the effect of the simultaneous presence of these elements on the microstructure of the obtained castings.
Highlights
Development of aluminum alloys constantly inclines towards the improvement of their strength at room and elevated temperatures
Based on the results quasicrystalline phases can be in Al-Mn alloysalloys modified
Based onpresented the presented results quasicrystalline phases canobtained be obtained in Al-Mn modified by
Summary
Development of aluminum alloys constantly inclines towards the improvement of their strength at room and elevated temperatures. It has been shown that nanosized primary metastable (I-phase) icosahedral particles formed by rapid solidification in the microstructure of transition metal-modified Al alloys result in high strength of prepared samples (above 600 MPa) [1,2]. This has been confirmed by some recent research [3,4,5].
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