Abstract
Aluminum casting/forging processes are used to produce parts for the automotive industry. In this study, we examined the influence of the forging step on the microstructure and the mechanical properties of an A356 aluminum alloy modified with strontium. Firstly, a design of samples which allows us to test mechanically the alloy before and after forging was created. A finite element analysis with the ABAQUS software predicts a maximum of strain in the core of the specimens. Observations with the EBSD technique confirm a more intense sub-structuration of the dendrite cells in this zone. Yield strength, ultimate tensile strength, elongation and fatigue lives were then improved for the casting/forging samples compared to the only cast specimens. The closure of the porosities and the improvement of the surface quality during the forging step enhance also the fatigue resistance of the samples.
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References
A. Wang et al., “A study of pore closure and welding in hot rolling process,” Journal of Materials Processing Technology, 60 (1996), 95–102.
H. Toda et al., “Healing behavior of preexisting hydrogen micropores in aluminum alloys during plastic deformation,” Acta Materialia, 57 (2009), 4391–4403.
J.C. Glez, J.H. Driver, “Substructure development in hot plane strain compressed Al-l%Mn crystals,” Acta Materialia, 51 (2003), 2989–3003.
M. Suraratchai et al., “Modelling the influence of machined surface roughness on the fatigue life of aluminium alloy,” Internationaljournal of Fatigue, 30 (2008), 2119–2126.
N. Nanninga, C. White, “The relationship between extrusion die line roughness and high cycle fatigue life of an AA6082 alloy,” International Journal of Fatigue, 31 (2009), 1215–1224.
A.K. Dahle et al., “Eutectic modification and microstructure development in Al-Si Alloys,” Materials Science and Engineering, A 413–414 (2005), 243–248.
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© 2012 TMS (The Minerals, Metals & Materials Society)
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Perrier, F., Desrayaud, C., Bouvier, V. (2012). Microstructural and mechanical evolutions during the forging step of the COBAPRESS, a casting/forging process. In: Weiland, H., Rollett, A.D., Cassada, W.A. (eds) ICAA13 Pittsburgh. Springer, Cham. https://doi.org/10.1007/978-3-319-48761-8_253
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DOI: https://doi.org/10.1007/978-3-319-48761-8_253
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48225-5
Online ISBN: 978-3-319-48761-8
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