Abstract
Cast Al(5.5 to 6.3 wt pct)Si-(3.1 to 3.7 wt pct)Cu alloys containing 0.6 and 1.2 wt pct Fe were processed by spray forming, rotary swaging, and homogenization/solution heat treatment, which led to a tensile ductility of 16 pct. Such outstanding ductility is ascribed to the microstructure formed: globular silicon particles, refined iron-rich intermetallics, and a supersaturated solid solution of Cu in the α-Al matrix that promoted dynamic strain aging and homogenization of the deformation process.
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The authors would like to thank the Brazilian institutions: Fundação de Amparo à Pesquisa do Estado de São Paulo/FAPESP (scholarship n° 19/05885-7 and Thematic Project, Grant No. 2013/05987-8), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior/CAPES (Finance code 001), and Conselho Nacional de Desenvolvimento Científico e Tecnológico - Brasil/CNPq for the financial support. They would also like to thank the Laboratory of Structural Characterization (LCE/DEMa/UFSCar) for the general facilities.
Conflict of interest: none.
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Martins Freitas, B.J., Jorge Junior, A.M., Zepon, G. et al. Outstanding Tensile Ductility in High Iron-Containing Al-Si-Cu Alloys. Metall Mater Trans A 51, 2703–2710 (2020). https://doi.org/10.1007/s11661-020-05744-x
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DOI: https://doi.org/10.1007/s11661-020-05744-x