Microstructural characterization of ordered intermetallic phase Al5MnTi2 with Ll1 superstructure.

• Autorzy: Jezierska, E.
• Konferencja: AMT'98 XVth Physical Metallurgy and Materials Science Conference 'Advanced materials & technologies' 17-21 May, 1998, Kraków-Krynica, Poland.
• Języki publikacji: EN

Abstrakty

EN

Macroalloyed with manganese Al3Ti+Mn alloys (4 and 10,5% at. Mn) were investigated by transmission electron microscopy (TEM) using JEM 100B and JEM 3010 Jeol microscopes. TEM samples were prepared by electrochemical polishing and ion beam thinning. Fine tetragonal precipitates of Al2Ti observable by TEM in cubic Ll2 ordered matrix might be responsible for the unusual brittleness of the off-stoichiometric composition of the Al67Mn4Ti29 alloy. For Al63Mn10,5Ti26,5 alloy more typical are antiphase domains with the size less than 30 nm. Long range order Ll2, and symmetry group were confirmed from the results of conventional and convergent beam electron diffraction (CBED) on Al3Ti+Mn polycrystals. The dislocations structure is typical for ordered phases; superdislocations, complex stacking faults, by-passing mechanism.

Słowa kluczowe

PL

mikrostruktura; faza międzymetaliczna; mangan; stop; skład chemiczny; struktura dyslokacyjna; błąd ułożenia; odkształcenie plastyczne

EN

microstructure; intermetallic phase; manganese; alloy; chemical composition; dislocation structure; stacking fault; plastic deformation

• Czasopismo: Inżynieria Materiałowa
• Rocznik: 1998
• Tom: R. XIX, nr 4
• Strony: 888-891
• Opis fizyczny: Bibliogr. 4 poz., rys.

Twórcy

autor

Jezierska, E.

• Warsaw University of Technology, Faculty of Materials Science and Engineering, Warsaw, Poland

• Warsaw University of Technology, Faculty of Materials Science and Engineering

Bibliografia

• [1] E.P. George, J.A. Horton, W.D. Porter and J.H. Schneibel, J. Mater. Res. Vol. 5, 8, Aug. (1990) 1639.
• [2] U. Prakash, R.A. Buckley, H. Jones and C.M. Sellars, Journal of Materials Science 27 (1992) 2001.
• [3] R.A.Varin, M.B. Winnicka, I.S. Virk, Structural Intermetallics, ed. By R. Darolia, J.J. Lewandowski, C.T. Liu, P.L. Martin, D.B. Miracle and M.V. Nathal, The Minerals, Metals & Materials Society (1993)117.
• [4] E. Jezierska, R.A. Varin, Proc. IX Conference on Electron Microscopy of Solids, 6-9 May 1996, Kraków –Zakopane, Poland (1996) 409.