Open AccessEffect of temperature on motion of misfit dislocation in γ/γ'interface of a Ni-based single-crystal superalloy:molecular dynamic simulations
Author(s) -
谢红献,
于涛,
刘波
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.046104
Subject(s) - superalloy , materials science , dislocation , nucleation , condensed matter physics , shear stress , stress (linguistics) , single crystal , shear (geology) , critical resolved shear stress , glide plane , crystallography , composite material , thermodynamics , alloy , physics , shear rate , chemistry , linguistics , philosophy , viscosity
The effect of temperature on motion of misfit dislocation in the γ/γ' interface of a Ni-based superalloy is studied in periodic simulation cells subjected to an applied shear stress. The simulation results show that no matter what temperature is, the motion of misfit dislocation occurs through the nucleation and the propagation of the double kink; at low temperature, the interaction of the misfit dislocation facilitates the motion of the misfit dislocation; on the contrary, at higher temperature, it can obstruct the motion of the misfit dislocation, and improves the mechanical properties of nickel-base superalloys.