Analysis of the effect of external physical fields on the casting of light alloys
Advanced methods of external physical effects on the aluminum alloys during casting process and addition of reinforcing elements, which are used in the Research Laboratory of High-Energy and Special Materials in Tomsk State University, are analyzed. These methods are mechanical stirring, treatment by electromagnetic fields, vibration, and ultrasound. Application of external fields leads to an increase in the performance of obtained alloys by means of degassing, decreasing in the average grain size, increasing in the uniformity of alloy structure, decreasing in the quantity of agglomerations and impurities on the grain boundaries, improving wettability, etc. The changes observed in the structure of melt and the dependence of melt properties on the type and treatment mode of the external field, on the characteristics of initial metal as well as on the characteristics and quantity of reinforcing particles added to the melt are shown. The results of several experiments demonstrating the effect of external fields on the aluminum alloys during casting process and the impact of reinforcing particles added to the melt are presented. The diagrams of technological installations whereby the external fields impact the melt are shown. The main parameters of operating conditions of installations are identified; for mechanical mixing they are the impeller rotation rate and the duration of mixing; for treatment by electromagnetic fields - the current intensity, the voltage frequency, and the exposure time; for ultrasound treatment - the capacity, the magnitude and the frequency of ultrasound, and the duration of application; for vibration - the frequency, the amplitude, and the duration of vibration.
Keywords
легкие сплавы,
механическое перемешивание,
электромагнитная обработка,
ультразвук,
вибрация,
light alloys,
mechanical mixing,
electromagnetic processing,
ultrasound,
vibrationAuthors
| Danilov Pavel A. | Tomsk State University | padanilov@gmail.com |
| Khrustalev Anton P. | Tomsk State University | tofik0014@mail.ru |
| Vorozhtsov Aleksander B. | Tomsk State University | abv1953@mail.ru |
| Zhukov Il'ya A. | Tomsk State University | gofra930@gmail.com |
| Promakhov Vladimir V. | Tomsk State University | vvpromakhov@mail.ru |
| Khmeleva Marina G. | Tomsk State University | khmelmg@gmail.com |
| Pikushchak Elizaveta V. | Tomsk State University | liza@ftf.tsu.ru |
| Kvetinskaya Alesya V. | The Ministry of Education and Science of the Russian Federation | ep.alessya.kvetinskaya@gmail.com |
Всего: 8
References
Choi H., Jones M., Konishi H., Li X. Effect of combined addition of Cu and aluminum oxide nanoparticles on mechanical properties and microstructure of Al-7Si-0.3Mg alloy // Metal. Mater. Trans. 2012. V. 43A. P. 738-746. DOI: 10.1007/s11661-011-0905-7.
Puga H., Costa S., Barbosa J., et al. Influence of ultrasonic melt treatment on microstructure and mechanical properties of AlSi9Cu3 alloy // J. Mater. Proc. Technol. 2011. No. 211. P. 1729-1735. DOI: 10.1016/j.jmatprotec.2011.05.012.
Vorozhtsov S.A., Eskin D.G., Tamayo J., et al. The application of external fields to the manufacturing of novel dense composite master alloys and aluminum-based nanocomposites // Metal. Mater. Trans. A: Phys. Metal. Mater. Sci. 2015. V. 46. No. 7. P. 2870-2875. DOI: 10.1007/s11661-015-2850-3.
Vorozhtsov S., Minkov L., Dammer V., et al. Ex situ introduction and distribution of nonme-tallic particles in aluminum melt: Modeling and experiment // JOM. 2017. V. 69. No. 12. P. 2653-2657. DOI: 10.1007/s11837-017-2594-1.
Kudryashova O.B., Eskin D.G., Khrustalev A.P., Vorozhtsov S.A. Ultrasonic effect on the penetration of the metallic melt into submicron particles and their agglomerates // Russ. J. Non-Ferrous Metals. 2017. V. 58. No 4. P. 427-433. DOI: 10.3103/ S1067821217040101.
Vorozhtsov S.A., Kudryashova O.B., Promakhov V.V., et al. Theoretical and experimental investigations of the process of vibration treatment of liquid metals containing nanoparticles // JOM. 2016. V. 68. No 12. P. 3094-3100. DOI: 10.1007/s11837-016-2147-z.
Sillekens W.H., Jarvis D.J., Vorozhtsov A., et al. The ExoMet Project: EU/ESA research on high performance light metal alloys and nanocomposites // Metal. Mater. Trans. A: Phys. Metal. Mater. Sci. 2014. V. 45. No 8. P. 3349-3361.
Grandfield J., Eskin D.G., Bainbridge I. Direct-Chill Casting of Light Alloys. John Wiley & Sons, 2013. 424 p.
Garcia-Rodriguez S., Puentes J., Li X.C., Osswald T.A. Prediction of vortex height from mechanical mixing in metal matrix nanocomposite processing by means of dimensional analysis and scaling // J. Manufacturing Processes. 2014. No. 16. P. 212-217. DOI: 10.1016/ j.jmapro.2013.12.001.
Патент № 2113672 РФ. Способ электромагнитного перемешивания электропроводных расплавов / Тимофеев В.Н., Христинич Р.М., Бояков С.А., Рыбаков С.А. Опубл. 20.06.1998.
Павлов Е.А., Боговалов С.В., Тимофеев В.Н., Надточий Д.С. Магнитогидродинамическое перемешивание алюминиевых раплавов в миксерах сопротивления // Сибирский журнал науки и технологий. 2006. Т. 5. № 12. С. 201-205.
Robles Hernandez F.C., Sokolowski J.H. Effects and on-line prediction of electromagnetic stirring on microstructure refinement of the 319 Al-Si hypoeutectic alloy // J. Alloys and Compounds. 2009. No. 480. P. 416-421. DOI: 10.1016/j.jallcom.2009.02.109.
Vorozhtsov S., Zhukov I., Vorozhtsov A., et al. Synthesis of micro- and nanoparticles of metal oxides and their application for reinforcement of Albased alloys // Advances in Materials Science and Engineering. 2015. P. 6. DOI: 10.1155/2015/718207.
Vorozhtsov S., Zhukov I., Promakhov V., et al. The Influence of ScF3 nanoparticles on the physical and mechanical properties of new metal matrix composites based on A356 aluminum alloy // JOM. 2016. V. 68. No. 12. P. 3101-3106. DOI: 10.1007/s11837-016-2141-5.
