ArticleName |
Reinforcing base metals for the production of non-heat-treatable
composite aluminium-based alloys |
ArticleAuthorData |
Siberian Federal University, Kransoyarsk, Russia:
V. G. Babkin, Professor N. A. Terentev, Post-Graduate Student, e-mail: fantasy114@ya.ru N. E. Chubarova, Student |
Abstract |
This paper considers the peculiarities of the production technology of reinforcing base metals Al – Ti(Zr) – C, Al – B – C and possibilities of their application for hardening of commercial-purity aluminium А6 and wrought alloys AD 31 (АД31). Technical aluminium (purity is not less than 99.6% (wt.)) was used as metallic basis for base metal obtaining. Thermostable nano - and microdimensional particles TiC, ZrC, C2Al3B48 (almost insoluble with standard melting and casting temperatures) were synthesized in this aluminium at the temperature of 1000–1100 oС. For the purpose of estimation of crystallization rate on reinforcing base metal structure, the melt was poured into steel and copper water cooling form, and into water during granulated base metal obtaining. Chemical and phase composition of base metals and microstructure of cast samples were investigated. Structure of all base metals includes three phases: aluminium solid solution (Alα); nano- and microdimensional particles ZrC, TiC, C2Al3B48, regularly distributed in metallic matrix; titanium, zirconium and boron aluminides with needle-shaped or lamellar morphology. New composite alloys on the basis of aluminium and wrought alloy Al – Mg – Si were obtained with application of developed reinforcing base metals. There was found the influence of structure, cooling rate and alloy crystallization interval on microstructure and physical-mechanical properties of composite material. Increase of alloy cooling rate from 10 to 100 oС/s leads to crushing of structural components of base metal by 5–10 times. Thermal analysis data tell that alloy crystallization interval is decreased in the following range: (Al – Ti – C) → (Al – B – C) → (Al – Zr – C). Grain size is decreased in the same sequence, and alloy durability is increased. |
keywords |
Base metal, aluminium alloys, synthesis, reinforcing particle, matrix melt, composite material, cooling rate, crystallization interval |
References |
1. Zakharov V. V. Legirovanie alyuminievykh splavov perekhodnymi metallami (Aluminium alloy building with transition metals). Tekhnologiya legkikh splavov = Technology of Light Alloys. 2011. No. 1. pp. 22–28. 2. Kniplung K., Dunand D., Seidman D. Precipitation evolution in Al – Zr and Al – Zr – Ti alloys during isothermal aging at 375–425 oC. Acta Materialia. 2008. Vol. 56. pp. 114–127. 3. Taylor A., Zhang M.-X. Understanding the co-poisoning effect of Zr and Ti on the grain refinement of cast aluminum alloys. Metallurgical and Material Transaction A. 2010. Vol. 41A. p. 3412. 4. Elagin V. I. Puti razvitiya vysokoprochnykh i zharoprochnykh konstruktsionnykh alyuminievykh splavov v XXI stoletii (Ways of development of high-strength and high-temperature construction aluminium alloys in the XXI century). Metallovedenie i termicheskaya obrabotka metallov = Metal Science and Heat Treatment. 2007. No. 9. pp. 3–11. 5. Kosnikov G. A., Baranov V. A., Petrovich S. Yu. Liteynye nanostrukturnye kompozitsionnye alyumomatrichnye splavy (Casting nanostructured composite aluminium-matrix alloys). Liteynoe proizvodstvo = Foundry. Technologies and Equipment. 2012. No. 2. pp. 4–9. 6. Kurganova Yu. A., Chernyshova T. A., Kobeleva L. I., Kurganov S. V. Ekspluatatsionnye kharakteristiki alyumomatrichnykh dispersnouprochnennykh kompozitsionnykh materialov i perspektivy ikh ispolzovaniya na sovremennom rynke konstruktsionnykh materialov (Exploitation characteristics of aluminium-matrix disperse-reinforced composite materials and prospects of their use on modern construction material market). Metally = Metals. 2011. No. 4. pp. 71–75. 7. Babkin V. G., Terentev N. A., Cherepanov A. I. Alyumomatrichnye kompozitsionnye splavy elektrotekhnicheskogo naznacheniya, uprochnennye nano- i mikrorazmernymi endogennymi fazami (Aluminium-matrix composite electrotechnical alloys, reinforced by nano- and microdisperse endogenous phases). Metally = Metals. 2014. No. 5. pp. 87–93. 8. Kocherginsky D. M., Reddy R. G. In situ processing of Al/SiC composite. Proceedings of symposium “In situ reactions for synthesis of composites, ceramics, and intermetallics”. Las Vegas, 1995. pp. 159–167. 9. Babkin V. G., Terent’ev N. A., Cherepanov A. I. Aluminum-matrix electrotechnical composite alloys hardened by endogenous nano- and microphases. Russian Metallurgy (Metally). 2014. No. 9. pp. 756–761. 10. Unlu B. S. Investigation of tribological and mechanical properties of Al2O3, SiC reinforced Al composites manufactured by casting or P/M method. Materials & Design. 2008. No. 29. pp. 2002–2008. 11. Babkin V. G., Cherepanov A. I., Terentev N. A. Litoy kompozitsionnyy material na osnove alyuminiya i sposob ego polucheniya (Cast aluminium-based composite material and its obtaining method). Patent RF, No. 2516679. Published: May 20, 2014. 12. GOST 11069–2001. Alyuminiy pervichnyy. Marki (State Standard 11069–2001. Primary aluminium. Grades). Introduced: January 01, 2003. (in Russian). 13. Rodney P. Elliott. Struktury dvoynykh splavov : spravochnik. Tom I (Constitution of Binary Alloys, First Supplement). Translated from English. Moscow : Metallurgiya, 1970. 456 p. 14. Makarov G. S. Slitki iz alyuminievykh splavov s magniem i kremniem dlya pressovaniya. Osnovy proizvodstva (Aluminium alloy ingots with magnesium and silicon for pressing. Basis of production). Moscow : Intermet Engineering, 2011. 528 p. |