Journals →  Tsvetnye Metally →  2024 →  #3 →  Back

COMPOSITES AND MULTIPURPOSE COATINGS
ArticleName Hot rolling of the composite manufactured by oxygen lancing of AlSi7Fe melt
DOI 10.17580/tsm.2024.03.05
ArticleAuthor Finkelstein A. B., Pellenen A. P., Khotinov V. A., Miao Jingtao
ArticleAuthorData

Ural Federal University named after the first President of Russia B. N. Yeltsin, Yekaterinburg, Russia

A. B. Finkelstein, Professor of the Department of Foundry and Strengthening Technologies, Doctor of Technical Sciences, Assosiate Professor, e-mail: avinkel@mail.ru

V. A. Khotinov, Professor of the Department of Heat Treatment and Metal Physics, Doctor of Technical Sciences, Assosiate Professor, e-mail: khotinov@yandex.ru

Miao Jingtao, postgraduate student of the Department of Foundry and Strengthening Technologies, e-mail: miaojingtao22@gmail.com

 

South Ural State University, Chelyabinsk, Russia

A. P. Pellenen, Associate Professor of the Department of Metal Forming Processes and Machines, Candidate of Technical Sciences

Abstract

Plastic deformation of cast composites contributes to increasing their mechanical and service properties. Most of the research in this field is devoted to overcoming porosity associated with increased gas saturation, when the reinforcing particles are added into the melt by stirring, and its subsequent sedimentation. The solution to the problem is the use of the in situ lancing technology for the pre-hydrogenated silumin melt with oxygen (forming of a reinforcing component as a result of chemical reactions in the melt). However, the achieved mechanical properties of the composite are low due to a chemically adsorbed hydrogen layer on the surface of Al2O3 reinforcing particles. To improve the mechanical properties, the authors used hot rolling. The proven technology provides for rolling cylindrical ingots across the axis with a reduction of up to 63% at a temperature of 550 оC. Ingots under rolling with a thickness of 1 mm or less were annealed at a temperature of 380 оC. The achieved thickness of the rolled sheets was 0.16 mm. Mechanical tests showed the achieved tensile strength of 250 MPa, which was 25% higher than in the cast billet, and yield strength was 197 MPa, being extremely insignificant, no more than 5% higher. The stress-strain curves showed load oscillations associated with the occurrence of microcracks. However, the latter does not lead to immediate fracture as in the cast state. A comparison of the stress-strain curves of the cast and rolled samples suggested that the observed oscillations were associated with thinning of the hydroxide layer – aluminum oxide on the surface of the reinforcement phase during hot rolling. It is the decrease in a share of combined hydrogen, and not the observed refinement of primary silicon crystals that is the reason for the increase in tensile strength of the composite. In the future, aluminum-matrix composite rolled products may become an alternative to wrought alloys.

keywords Hot rolling, in situ composite, aluminum oxide, primary silicon crystals, porosity, mechanical properties, hydrogen content
References

1. Cooke K. Aluminium alloys and composites. IntechOpen, 2020. DOI: 10.5772/intechopen.81519
2. Rohatgi P. Foundry processing of metal matrix composites. Mod. Cast. 1988. Vol. 78, No. 4. pp. 47–50.
3. Lemieux S., Elomari S., Nemes J. A. et al. Thermal expansion of isotropic Duralcan metal–matrix composites. Journal of Materials Science. 1998. Vol. 33, No. 9. pp. 4381–4387. DOI: 10.1023/A:1004437032224
4. Creber D. K., Poste S. D., Aghajanian M. K., Claar T. D. AlN composite growth by nitridation of aluminum alloys. 12th Annual Conference on Composites and Advanced Ceramic Materials. Part 1: Ceramic Engineering and Science Proceedings. The American Ceramic Society. 1988. Vol. 9, No. 7-8. pp. 975–982. DOI: 10.1002/9780470310496.ch50
5. Babcsán N., Leitlmeier D., Degischer H. P., Banhart J. The role of oxidation in blowing particle–stabilised aluminium foams. Advanced Engineering Materials. 2004. Vol. 6, No. 6. pp. 421–428. DOI: 10.1002/adem.200405144
6. Yolshina L. A., Muradymov R. V., Korsun I. V., Yakovlev G. A. et al. Novel aluminum-graphene and aluminum-graphite metallic composite materials: Synthesis and properties. Journal of Alloys and Compounds. 2016. Vol. 663. pp. 449–459. DOI: 10.1016/j.jallcom.2015.12.084
7. Finkelstein A. B., Chikova O. A., Schaefer A. Microstructures, mechanical properties ingot AlSi7Fe1 after blowing oxygen through melt. Acta Metallurgica Slovaca. 2017. Vol. 23, No. 1. pp. 4–11. DOI: 10.12776/ams.v23i1.808
8. Finkelstein A., Schaefer A., Dubinin N. Dehydrogenation of AlSi7Fe1 melt during in situ composite production by oxygen blowing. Metals. 2021. Vol. 11, No. 4. pp. 1–9. DOI: 10.3390/met11040551
9. Chikova O. A., Finkelshtein A. B., Shefer A. A. Structure and nanomechanical properties of the Al – Si – Fe alloy produced by blowing the melt with oxygen. Physics of Metals and Metallography. 2018. Vol. 119, No. 7. pp. 685–690. DOI: 10.1134/S0031918X18070037
10. Pramono A., Jamil A.M., Milandia A. Aluminum based composites by severe plastic deformation process as new methods of manufacturing technology. MATEC Web Conf. ICEE. 2018. Vol. 18. 04011. DOI: 10.1051/matecconf/201821804011
11. Lokesh G. N., Ramachandra M., Mahendra K. V. Effect of hot rolling on Al – 4.5% Cu alloy reinforced fly ash metal matrix composite. International Journal of Composite Materials. 2014. Vol. 4, No. 1. pp. 21–29. DOI: 10.5923/j.cmaterials.20140401.04
12. Herwig Nielsen, Waldemar Hufnagel, Georg Ganoulis. Aluminium – Taschenbuch. Moscow : Metallurgiya, 1979. 681 p.
13. Ajit Kumar S., Sasank Shekhar P., Gopal Krushna M. Effect of hot rolling on physical and mechanical properties of Al 6061 alloy-based metal matrix composite. Advances in Mechanical Processing and Design. Lecture Notes in Mechanical Engineering. Ed. Pant P., Mishra S. K., Mishra P. C. Singapore : Springer. DOI: 10.1007/978-981-15-7779-6_27
14. ISO BS EN 573–3:2019. Aluminium and aluminium alloys. Chemical composition and form of wrought products. Published: 01.02.2019. API ASME Publication. 56 p.
15. Afkham Y., Khosroshahi R. A., Rahimpour S. et al. Enhanced mechanical properties of in situ aluminium matrix composites reinforced by alumina nanoparticles. Archiv. Civ. Mech. Eng. 2018. Vol. 18. pp. 215–226. DOI: 10.1016/j.acme.2017.06.011
16. Ceschini L., Minak G., Morri A. Forging of the AA2618/20vol.% Al-2O3p composite: Effects on microstructure and tensile properties. Composites Science and Technology. 2009. Vol. 69, No. 11-12. pp. 1783–1789. DOI: 10.1016/j.compscitech.2008.08.027
17. Khosroshahi N. B., Mousavian R. T., Khosroshahi R. A., Brabazon D. Mechanical properties of rolled A356 based composites reinforced by Cu-coated bimodal ceramic particles. Materials & Design. 2015. Vol. 83. pp. 678–688. DOI: 10.1016/j.matdes.2015.06.027
18. Prudnikov A. N., Popova M. V., Prudnikov V. A. Influence of deformation on the structure and properties of silumins. Bulletin of Siberian State Industrial University. 2017. No. 3. pp. 11–17.
19. Rusin N. M., Skorentsev A. L. Stages of plastic flow of silumin-matrixbased composites during compression. Phys. Metals Metallogr. 2019. Vol. 120. pp. 813–818. DOI: 10.1134/S0031918X19080131
20. Wittman Z., Kantor E., Belafi K., Peterfy L. et al. Phase composition analysis of hydrous aluminium oxides by thermal analysis and infrared spectroscopy. Talanta. 1992. Vol. 39, No. 12. pp. 1583–1586. DOI: 10.1016/0039-9140(92)80187-i
21. Finkelstein A. B., Shak A. V., Schaefer A. A. Corrosion of an aluminum matrix composite in situ based on Al–7Si–1Fe alloy. Russ. J. Non-ferrous Metals. 2020. Vol. 61. pp. 108–111. DOI: 10.3103/S1067821220010046
22. Finkelstein A. B., Chernyi M. L., Shefer A. A., Kolyshkin M. I. Applying aluminum-matrix composites for porous cast aluminum. Liteynoe proizvodstvo. 2023. No. 12. pp. 19–21.

Language of full-text russian
Full content Buy
Back