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Vanadis 6 steel was boronized at temperatures from 950°C to 1050°C for durations from 0.75-10 h. The treatments produced layers with thickness from 4 to 133 μm, depending on the processing parameters. The layers' growth obeyed the parabolic growth law, and all the obtained boronized layers were two-phase (FeB + Fe 2 B), with the presence of a small amount of chromium boride. The layer growth induces considerable redistribution of alloying elements in regions near the surface. FeB had microhardness ranging from 2100 to 2300 HV0.05, while the microhardness of Fe 2 B was 1700-1900 HV0.05. The presence of boronized layers reduced the Charpy impact toughness of the steel by approximately 95%.

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In this study, the addition of Sn on the microstructure of Zn 1.6 wt.% Al 1.6 wt.% Mg alloy was studied. Currently, the addition of Sn into Zn-Al-Mg based systems has not been investigated in detail. Both as-cast and annealed states were investigated. Phase transformation temperatures and phase composition was investigated via DSC, SEM and XRD techniques. The main phases identified in the studied alloys were η(Zn) and α(Al) solid solutions as well as Mg2Zn11, MgZn2 and Mg2Sn intermetallic phases. Addition of Sn enabled the formation of Mg2Sn phase at the expense of MgxZny phases, while the overall volume content of intermetallic phases is decreasing. Annealing did not change the phase composition in a significant way, but higher Sn content allowed more effective spheroidization and agglomeration of individual phase particles.