A new model of the Cottrell atmosphere.

• Autorzy: Magalas L.B.
• Konferencja: XV Physical Metallurgy and Materials Science Conference on Advanced Materials & Technologies, AMT'98, Kraków-Krynica 17-21May 1998, Poland
• Języki publikacji: EN

Abstrakty

EN

This papers describes briefly a new model of the Cottrell atmosphere, which is based on the theory of complex cooperative phenomena. It is recognized that motion of dislocations dragging along the Cottrell cloud of foreign interstitial atoms (FIAs) under the action of an external harmonic stress field can be described by the relaxation function which may continuously cross over from a Debye function to a stretched exponential function. The one-sided Fourier transform of the derivative of the normalized relaxation function gives the same asymmetry of the carbon Snoek-Koster peak as observed in deformed ultra-high purity iron and in steel sheets after cold rolling. The effective diffusion coefficient of the FIAs in the Cottrell claud is lower than diffusion coefficient of the FIAs in a perfect bcc lattice.

Słowa kluczowe

EN

Cottrell atmosphere; model

PL

atmosfera Cottrella; model

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Inżynieria Materiałowa
• Rocznik: 1998
• Tom: R. XIX, nr 3
• Strony: 198--203
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Magalas L.B.

• University of Mining and Metallurgy – Akademia Górniczo-Hutnicza, AGH, Faculty of Metallurgy and Materials Science, Kraków, Poland

• University of Mining and Metallurgy, Faculty of Metallurgy and Materials Science, Kraków

Bibliografia

• [1] G. Schoeck, Acta Met., 11 (1963) 617.
• [2] G. Schoeck, Scripta Metall., 10 (1982) 233.
• [3] G. Schoeck, Scripta Metall., 22 (1988)389.
• [4] A. Seeger, Phys. Stat. Sol., (a) 55 (1979) 457.
• [5] A. Seeger, Journal de Physique, 42-C5 (1981) 201.
• [6] A. Seeger, Scripta Metall., 10 (1982) 241.
• [7] A. Seeger, M. Weller, J. Diehl, Z. L. Pan and T. S. Ke, Z. Metallkde., 73 (1982) 1.
• [8] L. B. Magalas and K. L. Ngai, in Mechanics and Mechanisms of Material Damping, ASTM, STP 1304, p. 189, 1997.
• [9] L. B. Magalas, Journal de Physique IV, 6 (1987) C8-163.
• [10] L. B. Magalas, Proc. Summer School on Internal Friction in Solids, June 1984, ed. S. Gorczyca and L. B. Magalas, Wydawnictwo AGH, Kraków, Poland, 1984, p. 89.
• [11] L. B. Magalas and G. Fantozzi, Journal de Physique IV, 6 (1987) C8-151