Metallurgical Processing of Al-Si Alloys with Increased Iron Content Using Sodium, Strontium, and Tellurium
DOI:
https://doi.org/10.7494/jcme.2018.2.1.9Abstract
This paper presents the results of research focused on the processing of the hypoeutectic Al-Si alloy with an increased iron content of 1.75 wt.%. The physical-metallurgical method was used to eliminate the undesirable effect of the iron rich b-phase on the mechanical properties of the casting material using liquid metal modification by strontium, sodium, and tellurium. The chemical composition of an experimental material didn’t contain any elements for the solid-solution strengthening of a matrix; therefore, the presented results can document the capabilities of modifying the b-phase under a minimum influence on the properties of the basic Al-Si system.
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References
Mondolfo L.F. (1976). Aluminium Alloys: Structure and Properties. London-Boston: Butter Worths.
Lu L. & Dahle A.K. (2005). Iron-rich intermetallic phases and their role in casting defect formation in hypoeutectic Al-Si alloys. Metallurgical and Materials Transactions A, 36(13), 819–835. doi:10.1007/s11661-005-1012-4
Ashtari P., Tetley-Gerard K., Sadayappan K. (2012). Removal of iron from recycled aluminium alloys. Canadian Metallurgical Quarterly, 51(1), 75–80. doi:10.1179/1879139511Y.0000000026
Belov N.A., Aksenov A.A., Eskin D.G. (2002). Iron in Aluminum Alloys: Impurity and Alloying Element. London: Taylor & Francis.
Warmuzek M. (2016). The AlFeMnSi intermetallics competition in the interdendritic eutectics in AlSi cast alloys influenced by cooling rate and transition metals content. Prace Instytutu Odlewnictwa, 56(1), 7–16. doi:10.7356/iod.2016.02
Shabestari S.G. (2004). The effect of iron and manganese on the formation of intermetallic compounds in aluminum-silicon alloys. Materials Science and Engineering A, 383 (2), 289−298.
Fortini A., Merlin M., Fabbri E., Pirletti S., Garagnani G.L. (2016). On the influence of Mn and Mg additions on tensile properties, microstructure and quality index of the A356 aluminum foundry alloy. Procedia Structural Integrity, 2, 2238–2245. doi:10.1016/j.prostr.2016.06.280
Chudokormov D.N., Pilárik S., Galuško A.M., Murgaš M., Striženkov M.I. (1988). Vplyv mikrolegovania na vlastnosti silumínov so zvýšeným obsahom železa. Slévárenství, 36(6), 228–230.
Wang M., Xu W. & Han Q. (2016). Study of Refinement and Morphology Change of AlFeSi Phase in A380 Alloy due to Addition of Ca, Sr/Ca, Mn and Mn, Sr. Materials Transactions, 57(9), 1509–1513. doi:10.2320/matertrans.M2015329
Suárez-Peña B. & Asensio-Lozano J. (2006). Influence of Sr modification and Ti grain refinement on the morphology of Fe-rich precipitates in eutectic Al-Si die cast alloys. Scripta Materialia, 54, 1543–1548.
Sigworth G.K. (2008). The Modification of Al-Si Casting Alloys: Important Practical and Theoretical Aspects. International Journal of Metalcasting, 2(2), 19–40. doi: 10.1007/BF03355425
Mahta M., Emamy M., Cao X., Campbell J. (2008). Overview of β-Al₅FeSi phase in Al-Si alloys. In: Olivante L.V. (ed.), Materials Science Research Trends. Nova Science Publishers Inc., 251–271.
Zhang L., Gao J., Nana Wiredu Damoah L., Robertson D.G. (2012). Removal of iron from aluminum: a review. Mineral Processing and Extractive Metallurgy Review, 33(2), 99–157. doi:10.1080/08827508.2010.542211
Taylor J.A. (2012). Iron-containing intermetallic phases in Al-Si based casting alloys. Procedia Materials Science, 1, 19–33. doi:10.1016/j.mspro.2012.06.004
Tillová E. & Panušková M. (2008). Effect of solution treatment on intermetallic phases morphology in AlSi9Cu3 cast alloy. Metalurgija, 47(3), 207–210.
Timpel M., Wanderka N., Grothausmann R., Banhart J. (2013). Distribution of Fe-rich phases in eutectic grains of Sr-modified Al-10 wt.% Si-0.1 wt.% Fe casting alloy. Journal of Alloys and Compounds, 558, 18–25. doi:10.1016/j.jallcom.2012.12.009
