Residual Stress Measurements Using Elasto-Plastic Indentation and ESPI

Abstract:

This paper presents a method for residual stress measurement using elasto-plastic contact indentation. This method for measuring residual stresses uses data on normal displacements in a bulging area around indentation. It is shown that magnitude and distribution of normal displacements is affected by magnitude and sign of residual stresses. Basic equations describing formation of bulging area around indentation are presented. To record distribution of displacements ESPI-method is used. The main elements of the technique for residual stress measurement using developed method are shown. The method is recommended to be used in the practice of scientific research organizations in the development, improvement and debugging techniques for renovation and hardening of parts.

• Periodical: Materials Science Forum (Volume 843)
• Pages: 161-166
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.843.161
• Online since: February 2016
• Authors: A.G. Ignatiev*, V.V. Erofeev, A.A. Tretyakov
• Keywords: ESPI-Method, Hardening Surface, Indentation, Measurements, Renovated Parts, Residual Stresses

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