Abstract
Additive manufacturing (AM) is a technology which has the potential to replace conventional casting methods. Its capacity to obtain complex shapes is the main advantage over other manufacturing techniques. Metastable structures in the form of supersaturated or amorphous/nano solid solutions could potentially help the manufacturing process, due to energy release during heating, caused by the phase transformations towards stable structures. Aluminum-based alloys are of interest due to their combined high specific strength to weight ratio, good ductility and superior corrosion resistance. The paper presents results concerning the development of Al-Si-Ni alloys in bulk and melt-spun ribbon forms. The thermal stability of the aluminum-based alloys was analyzed by Differential Scanning Calorimetry, while some of the mechanical properties were assessed by instrumented indentation. The fast-cooled alloys exhibit metastable structures, inferred from the exothermal peaks observed during heating. A hardening phenomenon was also observed in case of the melt-spun ribbons, compared to the bulk alloys.
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