Abstract
Improving the mechanical properties of high pressure die-cast (HPDC) components through T6 heat treatment is still a challenge due to surface blistering. In the current study, theoretical formulation of porosity growth in cast aluminum, EN AC 43100, has been developed along with differential scanning calorimetry and wave dispersive spectrometry to determine temperature ranges of phase transformations and Al-matrix enrichment of solutes. Optimal combinations of time and temperature for maximum possible Mg dissolution in the Al-matrix without blistering as well as tensile testing on samples extracted from HPDC components and samples from the gradient solidification technique that offers samples with low porosity levels have been performed. The results demonstrate that even if the Mg level in the Al-matrix increases and no blisters on component surface are apparent, the strength outcome is limited and can be degraded. Consequently no guarantees are granted that with a seemingly well performed T6 treatment, strength improvement will be realized.
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References
Rometsch, P.A. and Schaffer, G.B.,” Quench modelling of Al-7Si-Mg casting alloys”, Int. J. Cast Metal. Res., 2000, 12, 431–439.
Bonollo F., New quality and design standards for aluminium alloys cast, 2012.
Seifeddine S. and Svensson I.L., “Prediction of mechanical properties of cast aluminium components at various iron contents” Materials & Design 2010, 31, S6–S12.
Seifeddine S., “Characteristics of cast aluminium-silicon alloys: microstructures and mechanical properties” (Ph.D. thesis, Linköping University, 2006).
Young ,W. and Budyans.R., Roark’s formulas for stress and strain, 7Th Edition, 2002.
ASM Handbook, Castings, Gating Design, 15, 1993, 1280.
Fredriksson, H. and Åkerlind, U., Materials processing during casting, 2006.
Anson, J.P., “The nucleation and growth of Microporosity in Aluminum — 7% Silicon Foundry Alloy”, (Ph.D. thesis, University of Queensland, 2000).
Dutta, I. and Allen, S.M. “A calorimetric study of precipitation in commercial aluminium alloy 6061”, Journal of Materials Science Letters, 1991, 10, 323–326.
Sjölander E., “Heat treatment of Al-Si-Cu-Mg casting alloys” (Ph.D. thesis, Chalmers University of Technology, 2011).
Rometsch, P.A., Arnberg, L. and Zhang, D.L.,”Modelling dissolution of Mg2Si and homogenisation in Al-Si-Mg casting alloys”, Int. J. Cast Metal. Res.1999, 12, 1–8.
Closset, B., Drew, R.A.L. and Gruzleski, J.E., “Eutectic silicon shape control by in situ measurement of resistivity”. AFS Trans 1986, 94, 9–16.
Shivkumar S., et al.,”Effect of solution treatment parameters on tensile properties of cast aluminum alloys”. J. Heat Treating 1990, 8, 63–70.
Dons, A.L. and Pedersen, L., Brusethaug, S., “Modelling the microstructure of heat treated AlSi foundry alloys” Aluminium 2000, 76, 294–297.
Taylor, J.A. et al.,” Influence of Mg content on the microstructure and solid solution chemistry of Al-7%Si-Mg casting alloys during solution treatment”, Mater. Sci. Forum 2000, 331–337, 277–282.
Dons, A.L., Pedersen, L. and Arnberg, L, “The origin of ‘anomalous’ microsegregation in Al-Si foundry alloys — modelling and experimental verification”, Material Science A, 1999, 271, 1–2, 91–94.
Robinson, M. (Thesis, University of Queensland, Australia, 1996).
Gupta, A.K., Lloyd, D.J. and Court, S.A, “Precipitation hardening in Al-Mg-Si alloys with and without excess Si” Materials Science and Engineering A, 2001, 316, 11–17.
Maruyama, N. et al., “Effect of silicon addition on the composition and structure of fine-scale precipitates in Al-Mg-Si alloys” Scripta Materialia, 1997, 36: 89–93.
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Seifeddine, S., Poletaeva, D., Ghorbani, M., Jarfors, A. (2014). Heat Treating of High Pressure Die Cast Components: Challenges and Possibilities. In: Grandfield, J. (eds) Light Metals 2014. Springer, Cham. https://doi.org/10.1007/978-3-319-48144-9_32
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DOI: https://doi.org/10.1007/978-3-319-48144-9_32
Publisher Name: Springer, Cham
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