Indentation induced deformation in metallic materials. Metadata

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Title

  • Main Title Indentation induced deformation in metallic materials.

Creator

  • Author: Vadlakonda, Suman
    Creator Type: Personal

Contributor

  • Chair: Mirshams, Reza
    Contributor Type: Personal
    Contributor Info: Committee Chair
  • Committee Member: Banerjee, Rajarshi
    Contributor Type: Personal
  • Committee Member: Kaufman, Michael
    Contributor Type: Personal

Publisher

  • Name: University of North Texas
    Place of Publication: Denton, Texas

Date

  • Creation: 2005-12
  • Digitized: 2008-02-12

Language

  • English

Description

  • Content Description: Nanoindentation has brought in many features of research over the past decade. This novel technique is capable of producing insights into the small ranges of deformation. This special point has brought a lot of focus in understanding the deformation behavior under the indenter. Nickel, iron, tungsten and copper-niobium alloy system were considered for a surface deformation study. All the samples exhibited a spectrum of residual deformation. The change in behavior with indentation and the materials responses to deformation at low and high loads is addressed in this study. A study on indenter geometry, which has a huge influence on the contact area and subsequently the hardness and modulus value, has been attempted. Deformation mechanisms that govern the plastic flow in materials at low loads of indentation and their sensitivity to the rate of strain imparted has been studied. A transition to elastic, plastic kind of a tendency to an elasto-plastic tendency was seen with an increase in the strain rate. All samples exhibited the same kind of behavior and a special focus is drawn in comparing the FCC nickel with BCC tungsten and iron where the persistence of the elastic, plastic response was addressed. However there is no absolute reason for the inconsistencies in the mechanical properties observed in preliminary testing, more insights can be provided with advanced microscopy techniques where the study can be focused more to understand the deformation behavior under the indenter. These experiments demonstrate that there is a wealth of information in the initial stages of indentation and has led to much more insights into the incipient stages of plasticity.

Subject

  • Library of Congress Subject Headings: Materials -- Testing.
  • Library of Congress Subject Headings: Nanotechnology.
  • Keyword: nanoindentation
  • Keyword: strain rate
  • Keyword: plasticity

Collection

  • Name: UNT Theses and Dissertations
    Code: UNTETD

Institution

  • Name: UNT Libraries
    Code: UNT

Rights

  • Rights Access: public
  • Rights License: copyright
  • Rights Holder: Vadlakonda, Suman
  • Rights Statement: Copyright is held by the author, unless otherwise noted. All rights reserved.

Resource Type

  • Thesis or Dissertation

Format

  • Text

Identifier

  • OCLC: 69370493
  • Archival Resource Key: ark:/67531/metadc4904

Degree

  • Degree Name: Master of Science
  • Degree Level: Master's
  • Degree Discipline: Materials Science and Engineering
  • Academic Department: Department of Materials Science and Engineering
  • Degree Grantor: University of North Texas

Note

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