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Abstract
The excellent properties of the 2024 alloy make it a very important alloy in the aerospace industry. In the present study, the effect of titanium boron (TiB) additions and the rare earth cerium (Ce) with different additions (0.2, 1%) on microstructure and mechanical properties of 2024 aluminum-copper alloy in different conditions was investigated. It was found that TiB and Ce (0.2%) refine the microstructure; meanwhile, the 1% Ce addition increased the grain size again. The mechanical properties were improved by the additions of 0.2% TiB and 0.2% Ce. Meanwhile, with increasing Ce to 1%, a DROP in mechanical properties was observed. The percent increase is 20% for hardness, 104% for UTS, 71% for Y.S and 45.5% for elongation)