Preferences help
enabled [disable] Abstract
Number of results
2015 | 128 | 4 | 564-569
Article title

Composite Particles Formation and Behaviour in Al-Li Alloys Alloyed by Sc (Zr) under Heat Treatment and Severe Plastic Deformation

Title variants
Languages of publication
The mechanism and kinetics of Al₃Li/Al₃Sc composite particles formation during aging of triple Al-Li-Sc alloys were studied. The particles of such type consist of two isomorphic phases, ordered by L1₂ type. Composite particles in Al-Li-Sc are formed by epitaxial nucleation of δ' (Al₃Li) phase on pre-existing Al₃Sc precipitates at low temperature aging in the area of existence of Al₃Li phase, and form uniform shell around them. The motive force of such heterostructure formation is the minimization of total surface, elastic and chemical energy of the alloy. Dark-field transmission electron microscopy images of such composite particles taken from superlattice reflex 100 are composed of a dark core surrounded by a bright shell. The mutual diffusion of Li and Sc during the aging of Al-Li-Sc alloys is observed. The dark-field transmission electron microscopy image of the composite particle obtained from superlattice reflection became transparent after continuous natural aging of Al-Li-Sc alloys. The presence of the particle in Al matrix can be only seen due to decoration by secondary precipitations of δ' (Al₃Li) phase. Composition analysis of such transparent particles was carried out using two-beam kinematical theory of electron diffraction. Such composite particles with transparent cores remain in Al matrix even after severe plastic deformation of Al-Li-Sc alloy.
Physical description
  • Institute for Metal Physics of the NAS of Ukraine, Vernadsky Blvd. 36, 03680, Kyiv, Ukraine
  • Institute for Metal Physics of the NAS of Ukraine, Vernadsky Blvd. 36, 03680, Kyiv, Ukraine
  • Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovskii Str. 3, 03680, Kyiv, Ukraine
  • [1] V.I. Elagin, V.V. Zaharov, S.G. Pavlenko, T.D. Rostova, Phys. Met. Metall. 60, 88 (1985)
  • [2] A.L. Berezina, V.A. Volkov, B.P. Domashnikov, L.N. Trophimova, K.V. Chuistov, Metallofiz. Noveishie Tekhnol. 8, 116 (1986)
  • [3] A.L. Berezina, V.A. Volkov, N.I. Kolobnev, I.V. Bakonina, K.V. Chuistov, in: Questions of Aviation Science and Technique. Ser. Aviation Materials, VIAMM, Moscow 1988, p. 12 (in Russian)
  • [4] Y. Harada, D.C. Dunand, Acta Mater. 48, 3477 (2000), doi: 10.1016/S1359-6454(00)00142-7
  • [5] Y. Harada, D.C. Dunand, Mater. Sci. Eng. A 686, 329 (2002), doi: 10.1016/S0921-5093(01)01608-2
  • [6] K.E. Knipling, D.C. Dunand, D.N. Seidmen, Acta Mater. 56, 114 (2008), doi: 10.1016/j.actamat.2007.09.004
  • [7] R. Nandan, T. DebRoy, H.K.D.H. Bhadeshia, Prog. Mater Sci. 53, 980 (2008), doi: 10.1016/j.pmatsci.2008.05.001
  • [8] F.W. Gale, B. Vandersande, Acta Metall. 37, 1033 (1989), doi: 10.1016/0001-6160(89)90100-4
  • [9] A.L. Berezina, O.A. Molebnyi, T.A. Monastyrskaja, Nanosist. Nanomater. Nanotekhnol. 4, 803 (2006)
  • [10] P. Hirsch, A. Howie, R.B. Nicholson, D.W. Pashley, M.J. Whelan, Electron Microscopy of Thin Crystals, R.E. Krieger Publishing, Malabar, FL 1977
  • [11] M.E. Krug, D.C. Dunand, D.N. Seidmen, Appl. Phys. Lett. 92, 124107 (2008), doi: 10.1063/1.2901150
  • [12] M.E. Krug, D.C. Dunand, D.N. Seidmen, Acta Mater. 59, 1700 (2011), doi: 10.1016/j.actamat.2010.11.037
  • [13] K.V. Chuistov, Ordering and Decomposition in Supersaturated Solid Solution, RIO IMP, Kyiv 1999
  • [14] M.D. Rossell, R. Erni, A. Tolley, E. Marquis, V. Radmilovic, U. Dahmen, Microsc. Microanal. 14, Suppl 2, 1348 (2008), doi: 10.1017/S1431927608084808
  • [15] V. Radmilovic, A. Tolley, E.A. Marquis, M.D. Rossell, Z. Lee, U. Dahmen, Scr. Mater. 58, 529 (2008), doi: 10.1016/j.scriptamat.2007.11.012
  • [16] T.V. Zaporozhetsc, A.M. Gusak, O.N. Podolyan, Usp. Fiz. Met. 13, 1 (2012)
  • [17] Ja.E. Geguzin, Diffuse Zone, Nauka, Moscow 1979
  • [18] K.V. Chuistov, Aging of Metal Alloys, Akademperiodika, Kyiv 1994
  • [19] A.G. Khachaturian, Theory of Structure Transformations in Solids, Wiley, New York 1983
Document Type
Publication order reference
YADDA identifier
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.