Comparative analysis of the effect of magnesium and zinc on the structure and mechanical properties of hot-rolled and cold-rolled alloy Al–2%Cu–1.5%Mn sheetsстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 17 июля 2024 г.
Аннотация:In this study, using an example of cold-rolled sheets, the separate effect of magnesium and zinc in an amount up to 2% upon the structure and mechanical properties of a thermally non-hardening heat-resistant alloy Al–2%Cu–1.5%Mn, the composition of which is optimized to obtain the maximum fraction of Al20Cu2Mn3 phase, is studied. It is found that in a cast state, zinc is completely contained within aluminum solid solution, and magnesium is partially included within eutectic particles of the Al2CuMg phase. These elements hardly affect the amount of Al20Cu2Mn3 phase, which is formed during deformation and heat treatment in the form of nanoscale dispersoids. It is found that addition of 1% magnesium increases the strength of cold-rolled sheets of the base alloy by 15% after 3-hour annealing at 400°C, without reducing the ductility. In turn, alloying with zinc does not have a significant effect on strength.