Cooperative dissociations of misfit dislocations at bimetal interfaces | Zendy

K. Liu | Zendy; Ruifeng Zhang | Zendy; Irene J. Beyerlein | Zendy; X. Y. Chen | Zendy; Hui Yang | Zendy; Timothy C. Germann | Zendy

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Cooperative dissociations of misfit dislocations at bimetal interfaces

Author(s) -

K. Liu,

Ruifeng Zhang,

Irene J. Beyerlein,

X. Y. Chen,

Hui Yang,

Timothy C. Germann

Publication year - 2016

Publication title -

apl materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.571

H-Index - 60

ISSN - 2166-532X

DOI - 10.1063/1.4967207

Subject(s) - bimetal , materials science , stacking , stacking fault energy , partial dislocations , cube (algebra) , crystallography , dissociation (chemistry) , condensed matter physics , lattice (music) , dislocation , stacking fault , crystal structure , chemical physics , composite material , geometry , chemistry , physics , mathematics , nuclear magnetic resonance , acoustics

Using atomistic simulations, several semi-coherent cube-on-cube bimetal interfaces are comparatively investigated to unravel the combined effect of the character of misfit dislocations, the stacking fault energy difference between bimetal pairs, and their lattice mismatch on the dissociation of interfacial misfit dislocations. Different dissociation paths and features under loadings provide several unique deformation mechanisms that are critical for understanding interface strengthening. In particular, applied strains can cause either the formation of global interface coherency by the migration of misfit dislocations from an interface to an adjoining crystal interior or to an alternate packing of stacking faults connected by stair-rod dislocations

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