16 Citations (Scopus)

Abstract

The indentation behavior of metal/ceramic nanolayered composites is studied numerically using the finite element method. Attention is devoted to cyclic response under fixed maximum and minimum loads, with the primary objective of examining the evolving plastic deformation in the ductile metal constrained by the hard ceramic layers. The axisymmetric model consists of alternating aluminum (Al) and silicon carbide (SiC) thin films on a silicon (Si) substrate, with the Al/SiC layered structure indented by a conical diamond indenter. It is found that, unlike the homogeneous material where indentation unloading consists of purely elastic recovery, in the multilayered material plastic deformation in the Al layers continues to occur upon unloading and subsequent loading/unloading operations. With each additional cycle the indenter penetrates deeper into the composite. The modeling results are in qualitative agreement with the actual cyclic nanoindentation experiment conducted on the Al/SiC nanolayers.

Original languageEnglish (US)
Pages (from-to)119-125
Number of pages7
JournalMaterials Science and Engineering A
Volume557
DOIs
StatePublished - Nov 15 2012

Fingerprint

aluminum carbides
cermets
Cermets
unloading
Unloading
Aluminum
indentation
Indentation
silicon carbides
Silicon carbide
plastic deformation
Plastic deformation
Composite materials
Diamond
Silicon
Nanoindentation
nanoindentation
finite element method
recovery
diamonds

Keywords

  • Cyclic deformation
  • Finite element modeling
  • Nanoindentation
  • Nanolayered composites

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Cyclic indentation behavior of metal-ceramic nanolayered composites. / Shen, Y. L.; Blada, C. B.; Williams, J. J.; Chawla, Nikhilesh.

In: Materials Science and Engineering A, Vol. 557, 15.11.2012, p. 119-125.

Research output: Contribution to journalArticle

Shen, Y. L. ; Blada, C. B. ; Williams, J. J. ; Chawla, Nikhilesh. / Cyclic indentation behavior of metal-ceramic nanolayered composites. In: Materials Science and Engineering A. 2012 ; Vol. 557. pp. 119-125.
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