Evaluación de las propiedades mecánicas de la aleación Zn- 22Al-2Ag soldada por FSW variando las RPM

Recent developments with the zinag in the automotive industry allow us to obtain lighter and safer parts. The latest advancements in automotive industry technology are due to the recent incorporation of zinag into advanced body construction. The evolution of the automotive sector and the manufacture of bodywork on a large scale, can be explained by the excellent physical and chemical properties of this material. The new vehicles benefit from the lightness and high capacity of this material to absorb impacts, as well as its high resistance to corrosion. From different studies of engineers and researchers specialized in the sector, they look for ways to start using this material not only in the manufacture of high-end cars but also in mechanical components. For the development of this research work, a Zn-22Al-2Ag alloy called zinag was made for its alloying elements, which is being implemented in the automotive industry in automotive components, mainly in elements exposed to impact such as fenders and fenders. The present thesis seeks to evaluate the mechanical properties of the Zn-22Al-2Ag alloy when it is welded by fsw by varying the rpm, these being 900 rpm, 1100 rpm, 1200 rpm, 1300 rpm, 1500 rpm and 1600 rpm, in this way being able understand the behavior of these alloys under these conditions. The samples were obtained by casting in a floor furnace in which it works with electrical resistances. The samples were cast in a steel mold, which was preheated before casting our alloy to avoid thermal shock. Subsequently, the welding was carried out at different rpm, after the welding, samples were taken to perform the metallographic characterization and the different mechanical tests. 6 samples of our base alloy were subjected to a heat treatment (fast cooling and slow cooling in the oven), half of the samples were cooled in water. These alloys were fsw-welded under the same conditions as the previous ones, afterwards the metallographic analysis and the corresponding mechanical tests were performed. The results were compared with those of the samples tested without heat treatment.