Influence of External Magnetic Field on Structure Formation of Al–Si System Aluminum Alloy with High Iron Content
Processy litʹâ, 2020, Tom 140, №2, p.22-29
DOI:
https://doi.org/10.15407/plit2020.02.022Keywords:
aluminum alloy, hypo-eutectic Al–Si–Cu, magnetic field treatment, ferromagnetic inclusions in aluminum, microstructure, microhardnessAbstract
Received 26.05.2020
UDC 669.715:669.179
The comparative studies of the final structure of aluminum hypo-eutectic AlSi7Cu2 alloy with high iron content in the initial cast state and after the action of an external constant magnetic field on the melt after the crystallization process were studied. Macroscopic studies had shown that after the crystallization of alloy without the imposition of an external constant magnetic field in the structure of the alloy gas pores were formed as a consequence of significant gas content of the alloy or penetration into the alloy of gases which were released from the mold. With the help of metallographic analysis star-shaped phases evenly distributed in the volume of crystallized alloy were detected in the microstructure of alloy, which was exposed to a magnetic field and a uniform distribution of α - solid solution and α + Si eutectic compared to alloy in the initial state is observed. By the method of x-ray phase analysis, it was found that this physical treatment promotes the formation of Al15(MnFe)3Si2 phase instead of Al5FeSi phase in the ingot, obtained without treatment. According to the results of Vickers microhardness measurement, it was found that the application of an external constant magnetic field to the melt of hypo-eutectic alloy AlSi7Cu2 with high iron content allows to obtain high microhardness of solid solution in comparison with untreated alloy. Based on the results of qualitative and quantitative metallographic studies and X-ray structural phase analysis, conclusions were drawn about the nature of the influence of external physical treatment on the structure of the investigated alloy after crystallization.
References
Afonin, V. K. (2007) Metals and alloys: Reference book. St. Petersburg.: research and production association «Professional». Solntsev Yu.P. (Ed.), 1092 p. [In Russian].
Gulov, S. S., Ganiev, I. N., Berdiev, A. Je. (2018) The effect of strontium and germanium on the mechanical properties of AK7M2 alloy. Polytechnic Bulletin. Series: Engineering Research, 4 (44), 59–64. [In Russian].
Belov, V. D., Filippova, I. A., Hajchenko, V. E. (2014) Investigation of the effect of modifiers made of rapidly cooled AK7M2 alloy on the structure and properties of the basic composition AK7M2 alloy. High technology. Vol. 15, 8, 43–47. [In Russian].
Filippova, I. A., Hajchenko, V. E. (2014) Investigation of the effect of 50CU-50ZR ligature on the structure and mechanical properties of AK7M2 alloy. Chief mechanical engineer, 11, 35–38. [In Russian].
Nikitin, K. V., Nikitin, V. I., Timoshkin, I. Ju., Glushhenkov, V. A., Chernikov, D. G. (2016) Processing of melts by magnetic pulse fields to control the structure and properties of industrial silumins. News of higher educational institutions. Non-ferrous metallurgy,
, 34–42. [In Russian].
Chernikov, D. G., Glushhenkov, V. A., Nikitin, V. I., Nikitin, K. V. (2014) Improving the method of magnetic pulse processing of aluminum melts. Bulletin of the Samara Scientific Center of the Russian Academy of Sciences. Vol. 16, no. 6. [In Russian].
Dubodelov, V. I., Seredenko, V. A., Zatulovskij, S. S., Kosinskaja, A. V. (2010) Structuring of pre- and hypereutectic Al-Ni alloys upon their solidification in a constant uniform magnetic field. Casting processes, 6 (84). [In Ukrainian].
Procenko, I. G., Brusencov, Ju. A., Filatov, I. S. (2013) Hardening of aluminum heatresistant alloys. Transactions TSTU. Vol. 19, no. 2, 436–441. [In Russian].
Voron, M. M., Drozd, Ye. O., Berest, D. A. (2018) Structure and properties of Al–Si–Cu alloys after crystallization under magnetic field. Casting processes (1), 49–55.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2020 Т. М. Наріжна, О. М. Доній, М. М. Ворон*
This work is licensed under a Creative Commons Attribution 4.0 International License.
