• Kostiantyn Viktorovich Mykhalenkov National Technical University of Ukraine "KPI"
  • Victoriya Boyko
  • Thomas Link



aluminum casting alloy, precipitates, element distribution, natural hardening


The as-cast and heat treated structure of permanent mould and high pressure die castings of the AlMg5Si2Mn alloy has been investigated by differential scanning calorimetry, microhardness measurements, transmission electron microscopy and energy dispersive X-ray analysis. Inside the α-Al grains curved plate-like precipitates were detected for both alloys. Examination of these precipitates revealed a number of features, such as: (i) the composition of the precipitates is very close to the stochiometric Mg2Si compound; (ii) precipitates are aligned along dislocations; (iii) the precipitate density is much higher for the high pressure die castings where the α-Al matrix contains more dislocations than in permanent mould castings; (vi) precipitates lie inside the α-Al grains where they are randomly distributed. Between the Mg2Si lamellas precipitates were not observed; (v) homogenization of the alloy results in complete dissolution of the precipitates and during artificial aging new needle-shaped precipitates are formed.


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Author Biography

Kostiantyn Viktorovich Mykhalenkov, National Technical University of Ukraine "KPI"

Institute of Fundamentals of Metals Technology,

National Technical University of Ukraine "KPI"


Pacz A.: US Patent No. 1,387,900: Aluminum-Silicon Alloy. Patented August 16, 1921

Pacz A.: US Patent No. 2,013,926: Modification of aluminum, aluminum alloys and alloys containing aluminum. Patented September 10, 1935

Wilm A.: Physikalisch – metallurgische Untersuchungen über magnesiumhaltige Aluminiumlegierungen, Metallurgie, 8 (1911), 225–227

Duparc O.H.: Alfred Wilm and the beginnings of Duralumin. Zeitschrift für Metallkunde, 96, 4 (2005), 398–404

Wang Q.G. and Davidson C.J.: Solidification and precipitation behaviour of Al-Si-Mg casting alloys. Journal of Materials Science, 36 (2001), 739–750

Apelian D., Shivkumar S., and Sigworth G.: Fundamental Aspects of Heat Treatment of Cast Al-Si-Mg Alloys. AFS Transactions, 97 (1989), 727–742

Wuth M.C., Koch H., Franke A.J.: Production of steering wheel frames with an AlMg5Si2Mn alloy. Casting Plant and Technology International, 16, 1 (2000), 12–24

Otarwanna S., Gourlay C.M., Laukli H.I., and Dahle A.K.: Microstructure Formation in AlSi4MgMn and AlMg5Si2Mn High-Pressure Die Castings. Metallurgical and Materials Transactions A, 40, 7 (2009), 1645–1659

Petkov T., Kunstner D., Pabel T., Faerber K., Kneissl C. und Schumacher P.: Erweiterung des Eigenschaftspotentials der Legierung AlMg5Si2Mn durch eine gezielte Wärmebehandlung Berg- und Hüttenmännische Monatshefte, X (2013), 1-9, Jvn. Jg. (2013), Heft X© Springer-Verlag Wien, 1–9

Miao W.F., Laughlin D.E.: A differential scanning calorimetry study of aluminum alloy 6111 with different pre-aging treatments. Journal of Materials Science Letters, 19 (2000), 201–203

Vedani M., Angella G., Bassani P., Ripamonti D., and Tuissi A.: DSC analysis of strengthening precipitates

in ultrafine Al-Mg-Si alloys. Journal of Thermal Analysis and Calorimetry, 87, 1 (2007), 277–284

Wang G., Yan L., Ren G., and Zhao Z.: Analyzing As-Cast Age Hardening of 356 Cast Alloy. Journal of Materials Engineering and Performance, 20, 4 (2011), 399–404

Barabash O.M., Sulzhenko O.V., Legkaya T.N., and Korzhova N.P.: Experimental analysis and thermodynamic calculation of the structural regularities in the fusion diagram of the system of alloys Al-Mg-Si. Journal of Phase Equilibria, 22, 1 (2001), 5–11

Vander Voort G.F. and Asensio-Lozano J.: The Al-Si Phase Diagram. Microscopy and Microanalysis, 15, Supplement S2 (2009), 60–61

Ravi C., Wolverton C.: First-principles study of crystal structure and stability of Al-Mg-Si-(Cu) precipitates. Acta Materialia, 52 (2004), 4213–4227




How to Cite

Mykhalenkov, K. V., Boyko, V., & Link, T. (2015). STRUCTURE CHARACTERIZATION AND PRECIPITATION IN TWO Al-Mg-Si-Mn CASTING ALLOYS. Metallurgy and Foundry Engineering, 40(3), 111.