The hypereutectic aluminium-silicon alloys AlSi25Cu4Cr and AlSi25Cu5Cr are alloyed with refractory metals. The AlSi25Cu4Cr alloy is additionally alloyed with bo

The hypereutectic aluminium-silicon alloys AlSi25Cu4Cr and AlSi25Cu5Cr are additionally alloyed with Ni, Co, Mo in different concentrations. The influence of th

The present article aims to examine different approaches and technologies for producing multi-color 3D printed parts and reliefs using FDM/FFF printing technology. Several examples of parts used in the fields of technology, architecture, marketing and art are presented. The innovative HueForge software version 0.8.1 is used to create a multi-color relief. The process of establishing the Transmission Distance parameter of a given filament, which is key to creating colored reliefs with HueForge, is also examined.

Studies have been performed to establish the duration of the modifying effect of nanodiamond (ND) nanomodifiers on the structure of the AlSi18 alloy after the first and second melting, using a pre-modified with ND alloy. Experiments have been performed at different operating temperatures. Microstructural analysis has established the retention of the modifying effect of the used ND nanomodifier.

Two technological approaches were used to produce the hypereutectic aluminium-silicon alloys AlSi21Cu5MgCr, AlSi21Cu5Cr, AlSi25Cu4Cr and AlSi25Cu5Cr. In one case, alloys were melted from pure metals, metallurgical processing of the melts was carried out, and experimental castings were cast. In the other case, remelting of previously prepared alloys was carried out for casting test castings from the studied alloys, and the metallurgical processing of the melts was carried out at a lower temperature. The influence of the method of obtaining the alloys on their structure has been established.

Experiments were conducted to develop lightweight composites based on thermosetting polymers with cenosphere fillers. Cenospheres are rich in Al and Si particles and are known as low-density aluminosilicate CFA microspheres. The production of a polymer-based structural material (composite) with reduced weight and good mechanical properties, in which a waste product polluting the environment is used as a filler, is a current engineering task. Epoxy, polyester and vinylester resins were used, as well as different filler concentrations (cenospheres – 5 wt.%, 10 wt.% and 15 wt.%). The mechanical properties of the developed composites were studied. It was found that the use of cenospheres positively affects the mechanical properties of the vinylester resin, while in the case of other thermosetting plastics an increase in some of the mechanical characteristics was registered.