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Computational Study on Misfit Dislocation in Ni-Based Superalloys by Quasicontinuum Method

By Joy Rp Djuansjah, Kisaragi Yashiro and Yoshihiro Tomita

Abstract

Misfit dislocation at the =0 interface of Ni-based superalloys is investigated using the quasicontinuum simulation. In order to imitate the 0 phases, nickel embedding function is modified by changing the lattice parameter, bulk modulus and cohesive energy simultaneously. Negative and positive misfits with different magnitudes are set in the simulations. Atomic structure at the interface, spatial distance and strain energy density at the core dislocation are investigated. Shear simulation is also conducted for a flat interface of = 0 laminates, while the dislocation propagation and it’s interaction with interface are analyzed. [doi:10.2320/matertrans.MB200821

Topics: misfit dislocation, =0 microstructure, Ni-based superalloys, quasicontinuum method
Year: 2008
DOI identifier: 10.2320/matertrans.MB200821
OAI identifier: oai:CiteSeerX.psu:10.1.1.928.1992
Provided by: CiteSeerX
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