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2008 | 6 | 4 | 834-842
Tytuł artykułu

Onset of local ordering in some copper-based alloys: critical solute concentration vis-a-vis various solutionhardening parameters

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The mode of planar distribution of solute atoms in Cu single crystals alloyed with 0.5 to 8.0 at.%Ge has been investigated via the temperature dependence of the critical resolved shear stress of these alloys. It is found that there exists a critical solute concentration c m ≈ 5 at.%Ge below which the distribution of solute atoms in the crystal is random, and above which some local ordering occurs. This together with such data available in the literature for Cu-Zn, Cu-Al and Cu-Mn alloys, i.e. c m ≈7 at. %Zn, 7 at.%Al and 1 at.%Mn, when examined as a function of the size-misfit factor δ = (1/b)(db/dc)of a given binary alloy system, shows that the value of c m strongly depends on δ; the smaller the magnitude of δ, the greater the value of c m and vice versa. Also, the value of c m is found to correlate well with the electron-to-atom ratio (e/a)of the Cu-Zn, Cu-Al, Cu-Ge and Cu-Mn alloys with the solute concentration c = c m. However, no systematic correlation exists between the critical solute concentration c m for the onset of local ordering and the modulus-mismatch parameter η = (1/G)(dG/dc).
Wydawca

Czasopismo
Rocznik
Tom
6
Numer
4
Strony
834-842
Opis fizyczny
Daty
wydano
2008-12-01
online
2008-09-27
Twórcy
  • Department of Physics, University of Engineering and Technology, Lahore-, 54890, Pakistan, mzbutt49@yahoo.com
autor
  • Department of Physics, University of Engineering and Technology, Lahore-, 54890, Pakistan
  • Central Research Laboratory, Lahore College for Women University, Lahore-, 54000, Pakistan
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11534-008-0111-4
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