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Article Dans Une Revue Physical Review Letters Année : 2010

Predicting Dislocation Climb and Creep from Explicit Atomistic Details

Résumé

Here we report kinetic Monte Carlo simulations of dislocation climb in heavily deformed, body-centered cubic iron comprising a supersaturation of vacancies. This approach explicitly incorporates the effect of nonlinear vacancy-dislocation interaction on vacancy migration barriers as determined from atomistic calculations, and enables observations of diffusivity and climb over time scales and temperatures relevant to power-law creep. By capturing the underlying microscopic physics, the calculated stress exponents for steady-state creep rates agree quantitatively with the experimentally measured range, and qualitatively with the stress dependence of creep activation energies.

Domaines

Matériaux

Dates et versions

hal-00528046 , version 1 (20-10-2010)

Identifiants

Citer

M. Kabir, T.T. Lau, D. Rodney, S. Yip, K.J. van Vliet. Predicting Dislocation Climb and Creep from Explicit Atomistic Details. Physical Review Letters, 2010, 105 (9), pp.0955501. ⟨10.1103/PhysRevLett.105.095501⟩. ⟨hal-00528046⟩
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