Physics of deformation and destruction of the surface layers of materials

• Autorzy: Pyoun Y. S. , Alyokhin V. P. , Bulakhova A. A.
• Konferencja: Second International Tribology Conference
• Języki publikacji: EN

Abstrakty

EN

In this report the kinetic model of diffuse-limited propagation of dislocation loops in conditions of periodical crystal compression is proposed. It is shown that vacancy satiety, which originates by crystal compression, results in creation of vacancy clusters and dislocation loops. Main factors were analyzed responsible for anomalous features of plastic tlow in the subsurface material layers from the viewpoint of structural-energy features of nucleation, multiplication and thermoactivated dislocation motion near the free surface of solids. Calculation and experiments have shown that stress of homogenous and heterogenous nucleation of dislocations near free surface as a rule is considerably lower than that for the crystal volume. It has been also shown that dislocation velocities and main thermoactivation parameters of their motion in crystal below and above macroscopic yield point considerably differ. Major reason have been analyzed being responsible for the phenomenon.

Słowa kluczowe

EN

dislocation loop; vacancy; diffusion; free surface

PL

próżnia; dyfuzja; wolna powierzchnia

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2002
• Tom: Vol. 7, Spec. is
• Strony: 145--150
• Opis fizyczny: Bibliogr. 11 poz, wykr.

Twórcy

autor

Pyoun Y. S.

• Sun Moon University, #100, Kalsan ri, Tangjeong myeon, Asan si SOUTH KOREA

autor

Alyokhin V. P.

• Moscow State Industrial University, 109280, Moscow, Autozavodskaya, 16 RUSSIA

autor

Bulakhova A. A.

• Moscow State Industrial University, 109280, Moscow, Autozavodskaya, 16 RUSSIA

Bibliografia

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• [6] Gladkich N., Nidermauer R. and Sniegel IC (1966): Phys. Stat.SoL., vol.15, pp.181-185.
• [7] Hirth I. and Lote T. (1972): Theory of Dislocations. - Moscow, Atomizdat, pp.600.
• [8] Kosevich A.M, Saralidze Z.K. and Slezov V.V. (1964): Phys. stat. sol, vol.6, No. 11, pp.3383-3391.
• [9] Lyon H.B. and Somorjai G.A. (1966): J.Chem. Phys., vol.44, pp.3707-3711.
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