---
_id: '6903'
abstract:
- lang: eng
  text: Wear and removal of material from polycrystalline metal surfaces is inherently
    connected to plastic flow. Here, plowing-induced unconstrained surface plastic
    flow on a nanocrystalline copper surface has been studied by massive molecular
    dynamics simulations and atomic force microscopy scratch experiments. In agreement
    with experimental findings, bulges in front of a model asperity develop into vortexlike
    fold patterns that mark the disruption of laminar flow. We identify dislocation-mediated
    plastic flow in grains with suitably oriented slip systems as the basic mechanism
    of bulging and fold formation. The observed folding can be fundamentally explained
    by the inhomogeneity of plasticity on polycrystalline surfaces which favors bulge
    formation on grains with suitably oriented slip system. This process is clearly
    distinct from Kelvin-Helmholtz instabilities in fluids, which have been previously
    suggested to resemble the formed surface fold patterns. The generated prow grows
    into a rough chip with stratified lamellae that are identified as the precursors
    of wear debris. Our findings demonstrate the importance of surface texture and
    grain structure engineering to achieve ultralow wear in metals.
article_type: original
author:
- first_name: Nils
  full_name: Beckmann, Nils
  id: '62068'
  last_name: Beckmann
  orcid: 0000-0003-4337-7978
- first_name: P. A.
  full_name: Romero, P. A.
  last_name: Romero
- first_name: D.
  full_name: Linsler, D.
  last_name: Linsler
- first_name: M.
  full_name: Dienwiebel, M.
  last_name: Dienwiebel
- first_name: U.
  full_name: Stolz, U.
  last_name: Stolz
- first_name: M.
  full_name: Moseler, M.
  last_name: Moseler
- first_name: P.
  full_name: Gumbsch, P.
  last_name: Gumbsch
citation:
  ama: Beckmann N, Romero PA, Linsler D, et al. Origins of Folding Instabilities on
    Polycrystalline Metal Surfaces. <i>Physical Review Applied</i>. 2014. doi:<a href="https://doi.org/10.1103/physrevapplied.2.064004">10.1103/physrevapplied.2.064004</a>
  apa: Beckmann, N., Romero, P. A., Linsler, D., Dienwiebel, M., Stolz, U., Moseler,
    M., &#38; Gumbsch, P. (2014). Origins of Folding Instabilities on Polycrystalline
    Metal Surfaces. <i>Physical Review Applied</i>. <a href="https://doi.org/10.1103/physrevapplied.2.064004">https://doi.org/10.1103/physrevapplied.2.064004</a>
  bjps: <b>Beckmann N <i>et al.</i></b> (2014) Origins of Folding Instabilities on
    Polycrystalline Metal Surfaces. <i>Physical Review Applied</i>.
  chicago: Beckmann, Nils, P. A. Romero, D. Linsler, M. Dienwiebel, U. Stolz, M. Moseler,
    and P. Gumbsch. “Origins of Folding Instabilities on Polycrystalline Metal Surfaces.”
    <i>Physical Review Applied</i>, 2014. <a href="https://doi.org/10.1103/physrevapplied.2.064004">https://doi.org/10.1103/physrevapplied.2.064004</a>.
  chicago-de: Beckmann, Nils, P. A. Romero, D. Linsler, M. Dienwiebel, U. Stolz, M.
    Moseler und P. Gumbsch. 2014. Origins of Folding Instabilities on Polycrystalline
    Metal Surfaces. <i>Physical Review Applied</i>. doi:<a href="https://doi.org/10.1103/physrevapplied.2.064004,">10.1103/physrevapplied.2.064004,</a>
    .
  din1505-2-1: '<span style="font-variant:small-caps;">Beckmann, Nils</span> ; <span
    style="font-variant:small-caps;">Romero, P. A.</span> ; <span style="font-variant:small-caps;">Linsler,
    D.</span> ; <span style="font-variant:small-caps;">Dienwiebel, M.</span> ; <span
    style="font-variant:small-caps;">Stolz, U.</span> ; <span style="font-variant:small-caps;">Moseler,
    M.</span> ; <span style="font-variant:small-caps;">Gumbsch, P.</span>: Origins
    of Folding Instabilities on Polycrystalline Metal Surfaces. In: <i>Physical Review
    Applied</i> (2014)'
  havard: N. Beckmann, P.A. Romero, D. Linsler, M. Dienwiebel, U. Stolz, M. Moseler,
    P. Gumbsch, Origins of Folding Instabilities on Polycrystalline Metal Surfaces,
    Physical Review Applied. (2014).
  ieee: N. Beckmann <i>et al.</i>, “Origins of Folding Instabilities on Polycrystalline
    Metal Surfaces,” <i>Physical Review Applied</i>, 2014.
  mla: Beckmann, Nils, et al. “Origins of Folding Instabilities on Polycrystalline
    Metal Surfaces.” <i>Physical Review Applied</i>, 2014, doi:<a href="https://doi.org/10.1103/physrevapplied.2.064004">10.1103/physrevapplied.2.064004</a>.
  short: N. Beckmann, P.A. Romero, D. Linsler, M. Dienwiebel, U. Stolz, M. Moseler,
    P. Gumbsch, Physical Review Applied (2014).
  ufg: '<b>Beckmann, Nils et. al. (2014)</b>: Origins of Folding Instabilities on
    Polycrystalline Metal Surfaces, in: <i>Physical Review Applied</i>.'
  van: Beckmann N, Romero PA, Linsler D, Dienwiebel M, Stolz U, Moseler M, et al.
    Origins of Folding Instabilities on Polycrystalline Metal Surfaces. Physical Review
    Applied. 2014;
date_created: 2021-12-14T16:05:45Z
date_updated: 2023-03-15T13:50:08Z
doi: 10.1103/physrevapplied.2.064004
language:
- iso: eng
publication: Physical Review Applied
publication_identifier:
  issn:
  - 2331-7019
publication_status: published
quality_controlled: '1'
status: public
title: Origins of Folding Instabilities on Polycrystalline Metal Surfaces
type: journal_article
user_id: '62068'
year: 2014
...