Misfit dislocation network in Cu/Ni multilayers and its behaviors during scratching

Chen, Dong; Yan, Zhi Jun; Li, Yan

doi:10.1016/j.tsf.2006.10.001

Cited by 35 publications

(22 citation statements)

References 32 publications

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“…These boundaries have a low formation energy and hence, high thermal stability161718. It seems well understood that such interfaces contain three sets of dislocations ( a /2<110> or a /6<112>), depending on the stacking fault energy19202122. However, the node structure is rarely studied with respect to the node density and the character of interface dislocations.…”

mentioning

confidence: 99%

Spiral Patterns of Dislocations at Nodes in (111) Semi-coherent FCC Interfaces

Shao

Wang

Misra

et al. 2013

Sci Rep

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In semi-coherent interface, a superposed network of interface dislocations accommodates the attendant coherency strains in the adjacent crystals and their intersections (referred to as nodes) can act as sinks and sources for point defects because of the low formation energy. Nodes in {111} semi-coherent interfaces are characterized with a spiral pattern (SP), wherein the line direction of each dislocation entering a node curves. The structure of SP nodes is able to switch between condensed and expanded by either reaction with point defects or mechanical deformation. Due to the switching of the node structures, point defect formation energies at nodes can be significantly reduced. Combining atomistic simulation and dislocation theory, these features are proven universal corresponding to the node density and the character of interface dislocations.

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confidence: 99%

Spiral Patterns of Dislocations at Nodes in (111) Semi-coherent FCC Interfaces

Shao

Wang

Misra

et al. 2013

Sci Rep

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“…This is shown in the experimental results in Fig. 16.16 and in atomistic simulations of indentation (Cu-Ni [259,260] and Cu-Ag [261]) and scratch testing (Cu-Ni [262]). With minimal slip-plane misorientation, the strength of transparent A/B interfaces is attributed to a difference or 'mismatch' in (1) stress-free lattice parameter a 0 , (2) elastic shear modulus G (Koehler barrier), (3) chemistry (stacking-fault mismatch) g, and (4) Burgers vector b.…”

Section: Modeling and Simulation Atomisticsmentioning

confidence: 66%

Mechanical Properties of Nanostructured Metals

Anderson

Carpenter

Gram

et al. 2014

Handbook of Nanomaterials Properties

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PolycrystalsThis section is divided into four subsections. The subsection on synthesis and structure treats electrodeposition, severe plastic deformation, and mechanical alloying. It highlights features that affect mechanical properties such as texture, grain size and shape, internal stress, twinning, dislocations, and point defects. The mechanical properties subsection contrasts yield strength, ductility, strain hardening, strain-rate sensitivity, creep, and fatigue in conventional versus nanocrystalline metals. Underlying deformation mechanisms are then discussed in terms of deformation-mechanism maps and intragranular slip versus grain-boundarymediated regimes. Finally, modeling and simulation approaches are presented in terms of atomistic versus continuum methods.

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“…4b. Note that the misfit dislocations network here does not have the shape of regular triangles as analyzed in [14]. A probable reason is that this network was formed during the dynamic process of deposition, and has not reached equilibrium before being covered and restricted by upper atomic layers.…”

Section: Competing Domainsmentioning

confidence: 88%