title: Predicting dislocation climb and creep from explicit atomistic details.
abstract: 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.
authors.affiliation: Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: Mukul
authors.initials: M
authors.lastname: Kabir
authors.forename: Timothy T
authors.initials: TT
authors.lastname: Lau
authors.forename: David
authors.initials: D
authors.lastname: Rodney
authors.forename: Sidney
authors.initials: S
authors.lastname: Yip
authors.forename: Krystyn J
authors.initials: KJ
authors.lastname: Van Vliet