Two-step method to evaluate equibiaxial residual stress of metal surface based on micro-indentation tests

Masaaki Nishikawa, Hitoshi Soyama

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

The present study proposed a method to evaluate the equibiaxial compressive residual stress of a metal surface by means of a depth-sensing indentation method using a spherical indenter. Inverse analysis using the elastic-plastic finite-element model for an indentation test was established to evaluate residual stress from the indentation load-depth curve. The proposed inverse analysis utilizes two indentation test results for a reference specimen whose residual stress is already known and for a target specimen whose residual stress is unknown, in order to exclude the effect of other unknown mechanical properties, such as Young's modulus and yield stress. Residual stress estimated by using the indentation method is almost identical to that measured by X-ray diffraction for indentation loads of 0.49-0.98. N. Therefore, it can be concluded that the proposed method can effectively evaluate residual stress on metal surface.

Original languageEnglish
Pages (from-to)3240-3247
Number of pages8
JournalMaterials and Design
Volume32
Issue number6
DOIs
Publication statusPublished - 2011 Jun

Keywords

  • A. Ferrous metals and alloys
  • E. Mechanical
  • F. Plastic behavior

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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