Библиографическое описание:ВЛИЯНИЕ НАНОЧАСТИЦ TIO2 НА МИКРОТВЕРДОСТЬ АЛЮМИНИЕВЫХ СПЛАВОВ АА2024 : доклад, тезисы доклада / Х. М. Махан, С. В. Коновалов, И. А. Панченко. - [Б. м. : б. и.], 2023. - Текст : непосредственный // Перспективы развития двигателестроения : материалы международной научно-технической конференции имени Н.Д. Кузнецова / Самарский национальный исследовательский университет имени академика С.П. Королева ; Перспективы развития двигателестроения (2023 ; 21.06 - 23.06 ; Самара). - Самара : Самарский национальный исследовательский университет имени академика С.П. Королева, 2023. - 1. - С. 319-320. - ISBN 9785788319261. Перевод заглавия: THE EFFECT OF TIO2 NANOPARTICLES ON THE MICROHARDNESS OF ALUMINIUM ALLOYS AA2024
Аннотация:An aluminum alloy, AA 2024, was reinforced with different mass fractions of titanium dioxide nanoparticles (0%, 2.5%, 5%, and 7.5%) by stir casting, this was followed by a solution treatment at 500°C for 3 h, quenching in water, and aging at 175°C for 3 h. The purpose was to investigate the effect of TiO2 nanoparticles on the microstructure and mechanical properties of the stir-cast aluminum alloy AA2024. The hardness values in different positions of the composite aluminum were greatly improved compared to the samples without nanoparticles. Furthermore, the distribution of elements within the interior of the grain boundary was homogeneous, which increased the intercrystallite hardness values. The results showed that 5 wt.% of TiO2 was the optimum fraction to achieve the highest microhardness. The increase in hardness can be attributed to the uniformity of the microstructure and the more even distribution of Al2CuMg precipitates, which act as strengthening factors in aluminum alloys with nanoparticles. As more titanium particles are added, the formation of Al2CuMg compounds decreases, and the formation of Al2Ti7Cu compounds increases. Consequently, the hardness increases significantly due to the formation of numerous titanium-rich intermetallic compounds.
