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

• Autorzy: Muhammad Butt , Mozina Noshi , Farooq Bashir
• 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).

Słowa kluczowe

EN

copper alloys; yield stress; temperature dependence; composition fluctuations; local order

• Czasopismo: Open Physics
• Rocznik: 2008
• Tom: 6
• Numer: 4
• Strony: 834-842

Daty

wydano

2008-12-01

online

2008-09-27

Twórcy

autor

Muhammad Butt

• Department of Physics, University of Engineering and Technology, Lahore-, 54890, Pakistan,

autor

Mozina Noshi

• Department of Physics, University of Engineering and Technology, Lahore-, 54890, Pakistan

autor

Farooq Bashir

• Central Research Laboratory, Lahore College for Women University, Lahore-, 54000, Pakistan

Bibliografia

• [1] N.F. Mott, F.R.N. Nabarro, In: N. F. Mott (Ed), Report of a Conference on the Strength of Solids (The Physical Society, London, 1948) 1
• [2] H. Suzuki, In: H.J. McQueen, J.P. Bailon, J.I. Dickson, J.J. Jonas, M.G. Akben (Eds.), Strength of Metals and Alloys, vol. 3 (Pergamon, Toronto, 1986) 1727
• [3] J. Friedel, Dislocations (Pergamon, Oxford, 1964) 379
• [4] M.Z. Butt, P. Feltham, J. Mater. Sci. 28, 2557 (1993) http://dx.doi.org/10.1007/BF00356192[Crossref]
• [5] M.Z. Butt, P. Feltham, Acta Metall. 26, 167 (1978) http://dx.doi.org/10.1016/0001-6160(78)90213-4[Crossref]
• [6] M.Z. Butt, P. Feltham, I.M. Ghauri, J. Mater. Sci. 21, 2664 (1986) http://dx.doi.org/10.1007/BF00551470[Crossref]
• [7] P. Feltham, J. Phys. D-Appl. Phys. 1, 303 (1968) http://dx.doi.org/10.1088/0022-3727/1/3/305[Crossref]
• [8] M.Z. Butt, I.M. Ghauri, Phys. Status Solidi A 107, 187 (1988) http://dx.doi.org/10.1002/pssa.2211070119[Crossref]
• [9] M.Z. Butt, M.A. Khan, Phys. Status Solidi A 113, K189 (1989) http://dx.doi.org/10.1002/pssa.2211130260[Crossref]
• [10] M.Z. Butt, Z. Rafi, J. Mater. Sci. Lett. 10, 309 (1991) http://dx.doi.org/10.1007/BF00719693[Crossref]
• [11] M.Z. Butt, U. Sattar, J. Mater. Sci. Lett. 20, 759 (2001) http://dx.doi.org/10.1023/A:1010991816598[Crossref]
• [12] A. Asif, M.Z. Butt, J. Mater. Sci. 42, 2862 (2007) http://dx.doi.org/10.1007/s10853-006-1372-1[Crossref]
• [13] A. Asif, M.Z. Butt, Phil. Mag. 87, 1811 (2007) http://dx.doi.org/10.1080/14786430601080278[Crossref]
• [14] H.A. Roth, C.L. Davis, R.C. Thomson, Metall. Mater. Trans. A 28, 1329, (1997) http://dx.doi.org/10.1007/s11661-997-0268-2[Crossref]
• [15] K. Kamada, I. Yoshizawa, J. Phys. Soc. Jpn. 31, 1056 (1971) http://dx.doi.org/10.1143/JPSJ.31.1056[Crossref]
• [16] H. Traub, H. Neuhauser, C. Schwink, Acta Metall. 25, 437 (1977) http://dx.doi.org/10.1016/0001-6160(77)90234-6[Crossref]
• [17] M.Z. Butt, Phil. Mag. 87, 3595 (2007) http://dx.doi.org/10.1080/14786430701370850[Crossref]
• [18] R.P. Reed, J.M. Arvidson, Adv. Cryog. Eng. Mater. 30, 263 (1984)
• [19] M.Z. Butt, J. Phys.-Condens. Mat. 2, 5797 (1990) http://dx.doi.org/10.1088/0953-8984/2/26/017[Crossref]
• [20] P. Feltham, Phys. Status Solidi A 75, K95 (1983) http://dx.doi.org/10.1002/pssa.2210750162[Crossref]
• [21] P. Feltham, Phil. Mag. B 57, 111 (1988) http://dx.doi.org/10.1080/13642818808205727[Crossref]
• [22] M.Z. Butt, M.I. Nasir, R. Qamar, Fizika 13, 365 (1981)
• [23] C. Schwink, T. Wille, Scripta Metall. 14, 1093 (1980) http://dx.doi.org/10.1016/0036-9748(80)90212-4[Crossref]
• [24] W.R. Hibbard, Trans. Metall. Soc. AMIE 212, 1 (1958)

Identyfikatory

DOI

10.2478/s11534-008-0111-4