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Effect of iron on the microstructure and mechanical properties of the spray-formed and rotary-swaged 319 aluminum alloy

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Abstract

The influence of iron additions (0.8, 1.2, and 1.5 wt.%) on the microstructure and tensile properties of the 319 aluminum alloy processed by spray forming and rotary swaging was investigated. The spray-formed deposits were rotary-swaged at 573 K with an area reduction ratio of 5:1. Room temperature tensile tests showed a substantial increase of elongation at fracture (5.5 to 8%) when compared to the values observed for the iron-containing conventionally cast counterpart (0.6%). The high values of elongation at fracture were obtained due to the significant microstructural refinement and decrease of volumetric phase fraction, especially the iron-rich intermetallics, promoted by the combination of spray forming and rotary swaging. Therefore, this processing route significantly reduces the deleterious effect on the ductility caused by the iron content and the presence of β-AlFeSi intermetallic phase in hypoeutectic Al-Si alloy.

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Acknowledgments

The authors would like to thank the Laboratory of Structural Characterization (LCE/DEMa/UFSCar) for the general facilities.

Funding

This work was financially supported by the Brazilian institutions: Coordenação de Aperfeiçoamento de Pessoal de Nível Superior/CAPES (Finance code 001), Fundação de Amparo à Pesquisa do Estado de São Paulo/FAPESP (Thematic Project, Grant No. 2013/05987-8), and Conselho Nacional de Desenvolvimento Científico e Tecnológico - Brasil/CNPq.

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Authors and Affiliations

  1. Graduate Program in Materials Science and Engineering (PPGCEM), Federal University of São Carlos (UFSCar), Rodovia Washington Luís, km 235, São Carlos, SP, 13565-905, Brazil

    Brenda Juliet Martins Freitas, Lucas Barcelos Otani, Claudio Shyinti Kiminami, Walter José Botta & Claudemiro Bolfarini

  2. Department of Materials Engineering (DEMa), Federal University of São Carlos (UFSCar), Rodovia Washington Luís, km 235, São Carlos, SP, 13565-905, Brazil

    Claudio Shyinti Kiminami, Walter José Botta & Claudemiro Bolfarini

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  1. Brenda Juliet Martins Freitas
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  2. Lucas Barcelos Otani
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Correspondence to Brenda Juliet Martins Freitas.

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Freitas, B.J.M., Otani, L.B., Kiminami, C.S. et al. Effect of iron on the microstructure and mechanical properties of the spray-formed and rotary-swaged 319 aluminum alloy. Int J Adv Manuf Technol 102, 3879–3894 (2019). https://doi.org/10.1007/s00170-019-03449-z

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