The purpose of the thesis is to observe the effects of parameters such as time and temperature on the mechanical properties of heat-treated AlSi7Mg alloy with the addition of 1 mass % lithium. In the laboratory, we prepared an alloy that we melted in an induction furnace. We poured the alloy into a graphite mold, where we monitored the solidification process using a thermocouple and performed simple thermal analysis – ETA. We prepared 14 samples, which we cut, embedded in resin, and ground and polished. Then we solution-annealed the samples, followed by artificial aging, during which we varied the temperature and time of artificial aging. We then measured the mechanical properties, specifically Brinell hardness, where we took three measurements for each sample and calculated the average. This was followed by metallographic analysis. The samples were carbon coated and examined with optical and scanning electron microscopes, where we observed microstructural components. From the obtained results, we confirmed the presence of individual microstructural components and determined the most optimal heat treatment process to achieve the highest hardness.
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