An explanation for the shape of nanoindentation unloading curves based on finite element simulation Metadata

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Title

  • Main Title An explanation for the shape of nanoindentation unloading curves based on finite element simulation

Creator

  • Author: Bolshakov, A.
    Creator Type: Personal
  • Author: Pharr, G. M.
    Creator Type: Personal
    Creator Info: Rice Univ., Houston, TX (United States). Dept. of Materials Science
  • Author: Oliver, W. C.
    Creator Type: Personal
    Creator Info: Nano Instruments, Inc., Knoxville, TN (United States)

Contributor

  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization
    Contributor Info: USDOE, Washington, DC (United States)

Publisher

  • Name: Oak Ridge National Laboratory
    Place of Publication: Tennessee
    Additional Info: Oak Ridge National Lab., TN (United States)
  • Name: Oak Ridge Institute for Science and Education
    Place of Publication: Tennessee
    Additional Info: Oak Ridge Inst. for Science and Education, TN (United States)

Date

  • Creation: 1995-04-01

Language

  • English

Description

  • Content Description: Current methods for measuring hardness and modulus from nanoindentation load-displacement data are based on Sneddon`s equations for the indentation of an elastic half-space by an axially symmetric rigid punch. Recent experiments have shown that nanoindentation unloading data are distinctly curved in a manner which is not consistent with either the flat punch or the conical indenter geometries frequently used in modeling, but are more closely approximated by a parabola of revolution. Finite element simulations for conical indentation of an elastic-plastic material are presented which corroborate the experimental observations, and from which a simple explanation for the shape of the unloading curve is derived. The explanation is based on the concept of an effective indenter shape whose geometry is determined by the shape of the plastic hardness impression formed during indentation.
  • Physical Description: 6 p.

Subject

  • Keyword: Measuring Methods
  • STI Subject Categories: 36 Materials Science
  • Keyword: Elasticity
  • Keyword: Thin Films
  • Keyword: Young Modulus
  • Keyword: Hardness

Source

  • Conference: Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 28 Nov - 9 Dec 1994

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article

Format

  • Text

Identifier

  • Other: DE95008905
  • Report No.: CONF-941144--99
  • Grant Number: AC05-84OR21400;AC05-76OR00033
  • Office of Scientific & Technical Information Report Number: 35341
  • Archival Resource Key: ark:/67531/metadc683517

Note

  • Display Note: INIS; OSTI as DE95008905
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