Discrete Dislocation Dynamics Simulation of Interfacial Dislocation Network in Gamma/Gamma-Prime Microstructure of Ni-based Superalloys
K. Yashiro1, Y. Nakashima1, Y. Tomita1
CMES-Computer Modeling in Engineering & Sciences, Vol.11, No.2, pp. 73-80, 2006, DOI:10.3970/cmes.2006.011.073
Abstract A simple back force model is proposed for
a dislocation cutting into γ' precipitate, taking the work
formaking and recovering an anti-phase boundary (APB)
into account. The first dislocation, or a leading partial of
a superdislocation, is acted upon by a back force whose
magnitude is equal to the APB energy. The second dislocation,
or a trailing partial of a superdislocation, is attracted
by the APB with a force of the same magnitude.
The model is encoded in the 3D discrete dislocation dynamics
(DDD) code and applied to the cutting behavior
of dislocations at a γ/γ' interface covered by an… More >
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