Journal Article

FZJ-2022-01915

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Pattern Formation During Deformation of Metallic Nanolaminates

Gola, A. ; Schwaiger, R.FZJ* ; Gumbsch, P. ; Pastewka, L. (Corresponding author)

2020
APS College Park, MD

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Please use a persistent id in citations: http://hdl.handle.net/2128/31026  doi:10.1103/PhysRevMaterials.4.013603

Abstract: We used nonequilibrium molecular dynamics simulations to study the shear deformation of metallic composites composed of alternating layers of Cu and Au. Our simulations reveal the formation of “vortices” or “swirls” if the bimaterial interfaces are atomically rough and if none of the {111} planes that accommodate slip in fcc materials are exactly parallel to this interface. We trace the formation of these patterns back to grain rotation, induced by hindering dislocations from crossing the bimaterial interface. The instability is accompanied by shear softening of the material. These calculations shed light on recent observations of pattern formation in plastic flow, mechanical mixing of materials, and the common formation of a tribomutation layer in tribologically loaded systems.

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Contributing Institute(s):

1. Werkstoffstruktur und -eigenschaften (IEK-2)
2. John von Neumann - Institut für Computing (NIC)

Research Program(s):

1. 1241 - Gas turbines (POF4-124) (POF4-124)

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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