Introduction of scandium, zirconium and hafnium into aluminum alloys. Dispersion hardening of intermetallic compounds with nanodimensional particles
Abstract
The state of intermetallic compounds Al3Sc, Al3Zr, Al3Hf and slag shots introduced by high-temperature exchange reactions of corresponding fluoride-chloride salts with liquid aluminum has been studied. The particle size and segregation direction during centrifugation and filtration of melt have been examined by microscopy and local X-ray analysis methods. The dispersoids formed during decomposition of solid solution are strong phase reinforcers.
Keywords
Aluminum,
scandium,
zirconium,
hafnium,
alloy,
intermetallic compounds (IMC),
slag,
inclusions,
microstructure
About the Authors
V. M. Skachkov
Institute of Solid State Chemistry, Ural Branch of the Russian Academy of Science
Russian Federation
Russian Federation
Ekaterinburg
L. A. Pasechnik
Institute of Solid State Chemistry, Ural Branch of the Russian Academy of Science
Russian Federation
Russian Federation
Ekaterinburg
S. P. Yatsenko
Institute of Solid State Chemistry, Ural Branch of the Russian Academy of Science
Russian Federation
Russian Federation
Ekaterinburg
References
1. Zakharov V.V. Effect of scandium on the structure and properties of aluminum alloys. Metallovedeniye i termicheskaya obrabotka metallov, 7, P. 7–15 (2003). [in Russian]
2. Belov N.A., Alabin A.N. Promising aluminum alloys with zirconium and scandium additions. Tsvetnye metally, 2, P. 99–106 (2007). [in Russian]
3. Fanhao Zeng, Changging Xia, Yi Gu. The 430◦C isothermal section of the Al-4Mg-Sc-Zr quaternary system in the Al-rich range. J. Alloys and Compounds, 363, P. 175–181 (2004).
4. Popova E.A., Shubin A.B., Kotenkov P.V., Brodova L.E. et al. Al-Sc-Zr master alloy and estimation of its modifying ability. Rasplavy, 1, P. 12–15 (2011). [in Russian]
5. Kubaschewski O., Von Galdbeck. Phase diagram Hf-Al. In book: Hafnium: Physico-chemical Properties of its compounds and alloys. Atomic Energy Review, Special issue No. 8, IAEA, Vienna., P. 58–60 (1981).
6. Yatsenko S.P., Khokhlova N.A., Pasechnik L.A., Sabirzyanov N.A. Production of aluminum-based master alloys by high-temperature exchange reactions in salt melt. III. Multicomponent modifying a;uminum master alloys with scandium, zirconium and hafnium. Rasplavy, 2, P. 89–93 (2010). [in Russian]
7. RF patent No. 2421537. Method for production of aluminum-containing master alloy and charge for obtaining of aluminum-scandium-containing master alloy. Yatsenko S.P., Ovsyannikov B.V., Varchenya P.A. Patent holders: ISSC UB RAS and OJSC KUMZ. Published 2010, Bull. No. 22. [in Russian]
8. RF patent No. 2361941. Method for production of aluminum-scandium master alloy, flux for obtaining of master alloy and a device for implementation of the method. Yatsenko S.P., Sabirzyanov N.A., Yatsenko A.S. Published 2009, Bull. No. 20. [in Russian]
9. Simensen Chr.J. Sedimentation Analysis of Inclusions in Aluminium and Magnesium. Metallurgical Trans. B, 12B, P. 733–743 (1981).
10. Belov N.A. Phase composition of commercial and prospective alloys. Moscow: MISiS, 511 p. (2010). [in Russian]
11. Mandolfo L.F. Aluminum alloys: Structure and Properties. Butterworths, London, 312 p. (1976).
12. Kubaschewski O., Von Goldbeck. Hafnium: Physico-chemical Properties of its compounds and alloys. Atomic Energy Review. Special issue No. 8. IAEA. Vienna, 60 p. (1981).
13. Zakharova V.V., Rostova T.D. Effect of scandium, transitions metals and impurities on strengthening of aluminum alloys during decomposition of solid solution. Metallovedeniye i termicheskaya obrabotka metallov, 9(627), P. 12–19 (2007). [in Russian]
14. Skachkov V.M., Yatsenko S.P. Production of aluminum-based Sc, Zr, Hf, Y master alloys by hightemperature exchange reactions in salt melts. Tsvetnye metally, 3, P. 22–26 (2014). [in Russian]
15. Skachkov V.M., Varchenya P.A., Ovsyannikov B.V., Yatsenko S.P. Injection of scandium-containing process powders into aluminum alloys. Tsvetnye metally, 12, P. 81–86 (2013). [in Russian]
16. Darken L.S., and Gurry R.W. Physical chemistry of metals. McGraw Hill, New York, 535 p. (1953).
Review
For citations:
Skachkov V.M., Pasechnik L.A., Yatsenko S.P. Introduction of scandium, zirconium and hafnium into aluminum alloys. Dispersion hardening of intermetallic compounds with nanodimensional particles. Nanosystems: Physics, Chemistry, Mathematics. 2014;5(4):603-612.
Views:
6
Email this article 