INFLUENCE OF COMPLEX MODIFICATION ON THE FORMATION OF IRON-CONTAINING PHASES IN THE A380 ALLOY
DOI:
https://doi.org/10.15407/plit2026.01.023Keywords:
Al−Si−Cu, A380, complex modification, iron-containing phases, microstructure, phase formationAbstract
The work is devoted to the study of structural-phase characteristics, in particular - the modification of iron-containing phases in Al-Si-Cu system cast aluminum alloys after adding microalloying elements and modifiers (Co, Cr, V and Mo) to their composition separately and in various combinations with each other. The widespread commercial alloy A380 was chosen as a modeling material for the research. The prospects of using complex modification principles, which makes it possible to reduce the content of modifiers to 0.5 wt. % are shown. Such concentration of modifying additives is 2−3 times lower in comparison with similar studies. It is also shown that the best grain refinement and microstructure homogenization indicators were achieved by modifying the alloy with cobalt, vanadium and molybdenum. It was found that molybdenum is more effectively grain refiner, but it makes iron-containing phases less compact and promotes their formation by the primary mechanism even with single-component modification. The negative aspects of the molybdenum influence are enhanced by the addition of chromium, but they can be eliminated by the addition of vanadium and cobalt. Alloy modification according to the schemes Co+V, V+Mo, Cr+Co+Mo, V+Co+Mo and Co+Cr+V+Mo showed the highest efficiency of the influence on the structural-phase state of the A380 alloy. In particular, the formation of β-Al5FeSi-type phases was almost completely eliminated and significant modification and refinement of the α-AІ15(Fe,Mn,Me)3Si2-type phases, the sizes of which usually did not exceed 10…15 μm, was achieved. With an increase in the number of modifiers, especially vanadium and molybdenum, more signs of the iron-containing phases by the primary mechanism formation were observed, while maintaining their small sizes. It is shown that by varying the set and content of modifiers, it is possible make influence on the structure and phase formation of the Al−Si−Cu system alloys.
References
Aluminum alloys market outlook and statistics – 2024 [Electronic resource] // Global Market Insights Inc. Mode of access: https://www.gminsights.com/industry-analysis/aluminum-alloys-market
Adding value to secondary aluminum casting alloys: a review on trends and achievements / Helder Nunes [et al.] Materials. 2023. No. 3 (16). 895. https://doi.org/10.3390/ma16030895
Aluminum recycling and processing for energy conservation and sustainability: handbook / ed. by J. A. S. Green. Ohio, USA: ASM International, 2007. 267 p.
Making sustainable aluminum by recycling scrap: the science of “dirty” alloys / Dierk Raabe [et al.]. Progress in materials science. 2022. No. 1 (128). 100947. https://doi.org/10.1016/j.pmatsci.2022.100947
Aluminium and aluminium alloys: handbook / ed. by J. R. Davis. Ohio, USA: ASM International, 1993. 627 p.
Crepeau P. N. Effect of iron in Al-Si alloys: a critical review. Transactions of the American foundryman’s society. 1995. Vol. 103. P. 361–366.
Rana R. S. Reviews on the influences of alloying elements on the microstructure and mechanical properties of aluminum alloys and aluminum alloy composites / R. S. Rana, R. Purohit, S. Das. International journal of scientific and research publications. 2012. No. 6 (2). P. 1–7.
Kumar K. S. Ternary intermetallics in aluminium refractory-metal X systems (X = V, Cr, Mn, Fe, Co, Ni, Cu, Zn). Intermetallic materials review. 1990. No. 1 (35). P. 293–327. https://doi.org/10.1179/095066090790324037
Selected characteristic of silumins with additives of Ni, Cu, Cr, Mo, W and V / S. Pietrowski [et al.]. Archives of foundry engineering. 2010. No. 2 (10). P. 107–126.
Pietrowski S. Crystallization, microstructure and mechanical properties of silumins with micro-additions of Cr, Mo, W and V / S. Pietrowski, T. Szymczak. Archives of foundry engineering. 2010. No. 1 (10). P. 123–136.
Farkoosh A. R. Dispersoid strengthening of a high temperature Al–Si–Cu–Mg alloy via Mo addition / A. R. Farkoosh, X. G. Chen, M. Pekguleryuz. Materials science and engineering: A. 2015. Vol. 620. P. 181–189. https://doi.org/10.1016/j.msea.2014.10.004
Tensile and fatigue properties of a cast aluminum alloy with Ti, Zr and V additions / H. A. Elhadari [ et al.]. Materials science and engineering: A. 2011. Vol. 528. P. 8128–8138. https://doi.org/10.1016/j.msea.2011.07.018
Mbuya T. O. Influence of iron on castability and properties of aluminium silicon alloys: literature review / T. O. Mbuya, B. O. Odera, S. P. Ng’ang’a. International journal of cast metals research. 2003. Vol. 16. P. 451–465. https://doi.org/10.1080/13640461.2003.11819622
Bolibruchova D. Vanadium influence on iron based intermetallic phases in AlSi6Cu4 alloy / D. Bolibruchova, M. Zihalova. Archives of metallurgy and materials. 2014. No. 3 (59). P. 837–841. https://doi.org/10.2478/amm-2014-0172
Voron М. Vanadium edition influence on the structural and phase parameters of Al-Si-Cu alloys / M. M. Voron [et al.]. Casting processes. 2019. No.6 (138). P. 52–58.
Ahmad R. The effect of chromium addition on fluidity, microstructure and mechanical properties of aluminum LM6 cast alloy. International journal of materials science research. 2018. No. 1 (1). P. 32–35. https://doi.org/10.18689/ijmsr-1000105
Timelli G. The influence of Cr content on the microstructure and mechanical properties of AlSi9Cu3(Fe) die-casting alloys / G. Timelli, F. Bonollo. Materials science and engineering: A. 2010. No. 1 (528). P. 273–282. https://doi.org/10.1016/j.msea.2010.08.079
The role of Cr additions and Fe-rich compounds on microstructural features and impact toughness of AlSi9Cu3 (Fe) diecasting alloys / G. Timelli [et al.]. Materials science and engineering: A. 2014. Vol. 603. P. 58–68. https://doi.org/10.1016/j.msea.2014.02.071
Effect of Mo addition on room and high temperature tensile behavior of Al-Si-Cu-Mg alloy in as-cast and heat-treated conditions / M. Zamani [et al.]. Advanced materials research. 2019. Vol. 1155. P. 71–79. https://doi.org/10.4028/www.scientific.net/AMR.1155.71
Characteristics of Al-Si alloys with high melting point elements for high pressure die casting / Tomasz Szymczak [et al.]. Metals. 2020. Vol. 13. 4861. https://doi.org/10.3390/ma13214861
Shabestari S. G. Gravity segregation of complex intermetallic compounds in liquid aluminum-silicon alloys / S. G. Shabestari, J. E. Gruzleski. Metallurgical and materials transactions: A. 1995. Vol. 26A. P. 999–1006. https://doi.org/10.1007/BF02649097
Gustafsson G. Influence of Fe and Cr on the microstructure of cast Al-Si-Mg alloys / G. Gustafsson, T. Thorvaldsson, G. L. Dunlop. Metallurgical transactions: A. 1986. Vol. 17A. P. 45–52. https://doi.org/10.1007/BF02644441
Precipitation of Fe rich intermetallics in Cr- and Co-modified A413 alloy / M. Mahta [et al.]. International journal of cast metals research. 2005. Vol. 18. P. 73–79. https://doi.org/10.1179/136404605225022928
Microstructural characteristics of AlSi9Cu3(Fe) alloy with high melting point elements / Tomasz Szymczak [et al.]. Metalls. 2020. No.10 (10). 1278. https://doi.org/10.3390/met10101278
Characteristics of Al-Si alloys with high melting point elements for high pressure die casting / Tomasz Szymczak [et al.]. Metals. 2020. Vol. 13. 4861. https://doi.org/10.3390/ma13214861
Szymczak T. Evaluation of the effect of Cr, Mo, V and W on the selected properties of silumins / T. Szymczak, J. Szymszal, G. Gumienny. Archives of foundry engineering. 2018. No. 4 (18). P. 77–82. https://doi.org/10.24425/afe.2018.125172
