Atomic insights into interface-mediated plasticity and engineering principles for heterogeneous serrated interfaces

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27640%2F23%3A10253194" target="_blank" >RIV/61989100:27640/23:10253194 - isvavai.cz</a>

Alternative codes found

RIV/61989100:27740/23:10253194

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0749641922002753" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0749641922002753</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijplas.2022.103498" target="_blank" >10.1016/j.ijplas.2022.103498</a>

Result language

angličtina

Original language name

Atomic insights into interface-mediated plasticity and engineering principles for heterogeneous serrated interfaces

Original language description

Metallic nanolayered composites typically experience substantially enhanced resistance to irre-versible deformation as the portion of interfaces increases. Three-dimensional (3D) serrated in-terfaces possess considerably higher resistance to interface-facilitated plasticity than two-dimensional (2D) planar interfaces; however, the atomistic mechanisms underlying this phe-nomenon are little explored, while the engineering principles of tailoring atomic serrations are nearly unknown. In this study, two known representative serrated interfaces, i.e., Cu{991}// {112}Nb and Cu{112}//{112}Nb interfaces, are analyzed using atomic-scale simulations and interfacial dislocation theory and comprehensively compared with their planar counterparts. The Cu{991}//{112}Nb and Cu{112}//{112}Nb serrated interfaces exhibit the novel interface-facilitated deformation behaviors of deformation twinning and near-interface dislocation nucle-ation, respectively. The stress inhomogeneity arising from the geometrical mismatch between Cu and Nb serrations contributes to deformation twinning rather than dislocation nucleation, while the improved symmetry of highly distorted atomic hexagons on the extended Cu{111}//{110}Nb facets dominates the near-interface dislocation nucleation. Both deformation twinning and dislocation nucleation are closely related to the geometry and characteristics of atomic serrations at the interfaces, which differ from those observed in planar interfaces. Further systematic in-vestigations of fourteen serrated interfaces derived from Cu{991}//{112}Nb and Cu{112}// {112}Nb suggest that the screened facet planes, free volume, and Poisson&apos;s ratio mismatch may be used as critical descriptors to tailor the mechanical properties and responses, which presents a convenient solution for interface engineering. These findings provide not only novel atomistic mechanisms that explain the localized interface-facilitated plasticity, but also general principles for engineering atomically serrated interfaces.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

International Journal of Plasticity

ISSN

0749-6419

e-ISSN

1879-2154

Volume of the periodical

160

Issue of the periodical within the volume

January

Country of publishing house

US - UNITED STATES

Number of pages

16

Pages from-to

—

UT code for WoS article

000924585100001

EID of the result in the Scopus database

2-s2.0-85144379186