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Journal of Materials Science

, Volume 42, Issue 19, pp 8203–8208 | Cite as

Stress characterization of surface damages on soda-lime glass using a nanocontact deformation method

  • Yun-Hee LeeEmail author
  • Ju-Young Kim
  • Unbong Baek
  • Seung-Hoon Nahm
Article

Abstract

A nanocontact deformation method was used to measure the local and graded residual stresses around contact damages. By analyzing influences of the residual stress on nanocontact deformation itself instead of measuring the secondary crack emanated from it, 0.65 μm spatial resolution, which was superior to the highest level 1.8 μm attained by previous indentation fracture mechanics tests with an acute cube-corner indenter, was obtained with a general Berkovich indenter. However, a stress model combined with the nanocontact deformation provided only average stress variation around the contact damages. Thus, a resolution of two principal components from the residual stress in a biaxial state has been attempted in this study. By introducing radial microcracks around artificial microVickers damages, a crack-normal circumferential stress component disappeared and a series of nanoindentations close to the microcrack line yielded a variation of the radial stress component. By comparing this result with the average stress variation mentioned above, the crack-opening circumferential stress was measured and showed a good consistency with the previous study in soda-lime glass. In addition, distinctive features of present method were compared with previous indentation fracture mechanics method.

Keywords

Residual Stress Circumferential Stress Radial Crack Indentation Load Biaxial Stress 

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Yun-Hee Lee
    • 1
    Email author
  • Ju-Young Kim
    • 2
  • Unbong Baek
    • 1
  • Seung-Hoon Nahm
    • 1
  1. 1.Division of Metrology for Quality LifeKorea Research Institute of Standards and ScienceDaejeonKorea
  2. 2.School of Materials Science and EngineeringSeoul National UniveristySeoulKorea

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