Mechanical Performance of Zr-Containing 354-Type Al-Si-Cu-Mg Cast Alloy: Role of Geometrical Discontinuities

Abdelaziz, M. H.; Elsharkawi, E. A.; Doty, H. W.; Samuel, F. H.

doi:10.1007/s11665-020-05112-1

Cited by 4 publications

(1 citation statement)

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“…In the case of the Al-Cu alloys mentioned earlier, during the precipitation-hardening heat treatments, the supersaturated Al-Cu solid solution gives rise to Guinier-Preston (GP) zones and θ , θ , and θ phases, with a loss in coherency and an increase in particle size as aging time is increased. If the aging time were fixed, then this sequence of events would occur with an increase in the aging temperature [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Effect of Zr and Ti Addition and Aging Treatment on the Microstructure and Tensile Properties of Al-2%Cu-Based Alloys

et al. 2022

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The present work investigated the effect of aging treatment on the microstructure and tensile properties of an Al-2%Cu base alloy containing various additions of Zr and other alloying elements. Aging was carried out at temperatures of 180–300 °C for different aging times at each temperature. The tensile properties indicated that Zr additions improved the strength of the base alloy, especially at high Zr levels at 180 °C. At the 220 °C aging temperature, however, while Zr addition did not have a beneficial effect on the alloy strength, the ductility was found to improve. Zr-Ti combined additions had a significant effect on the microstructure of the base alloy, as the morphology of the α-Al grains transformed into a non-dendritic morphology, and the grain size decreased sharply. These effects were at their maximum at 180 °C and 0.5 wt% Zr addition. Moreover, the Zr-containing alloys aged at higher temperatures, such as 220 °C and 240 °C, maintained a noticeably higher level of strength over the base alloy aged at the same temperatures. Quality index charts based on the tensile test data also reflected an improvement in alloy quality and strength with Zr-Ti combined additions.

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Section: Introductionmentioning

confidence: 99%