Predicting dislocation climb: Classical modeling versus atomistic simulations

Article

关键词: HIGH-TEMPERATURE CREEP;    STEADY-STATE CREEP;    ALPHA-IRON;    BULK DIFFUSION;    DEFORMATION;    DYNAMICS;    KINETICS;    LOOPS;   

DOI  :  10.1103/PhysRevB.84.092106

来源: SCIE

【 摘 要 】

The classical modeling of dislocation climb based on a continuous description of vacancy diffusion is compared to recent atomistic simulations of dislocation climb in body-centered cubic iron under vacancy supersaturation [Phys. Rev. Lett. 105, 095501 (2010)]. A quantitative agreement is obtained, showing the ability of the classical approach to describe dislocation climb. The analytical model is then used to extrapolate dislocation climb velocities to lower dislocation densities, in the range corresponding to experiments. This allows testing of the validity of the pure climb creep model proposed by Kabir et al. [Phys. Rev. Lett. 105, 095501 (2010)].

【 授权许可】

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