Measurement of residual stresses in machined ceramics using the indentation technique

Y. Ahn, S. Chandrasekar, T. N. Farris

Research output: Chapter in Book/Report/Conference proceedingChapter

4 Scopus citations

Abstract

Machining produces surface residual stresses which significantly influence the strength and fatigue resistance of ceramic components. As new methods are developed for machining ceramics, a quick and reliable technique for measurement of residual stresses would be valuable in assessing the viability of the new machining method from a residual stress perspective. The residual stresses on ground and polished (i.e. machined) surfaces of soda-lime glass, Ni-Zn ferrite, and silicon nitride have been measured using an indentation technique with a Vickers indenter. In this technique, the surface extent of the median/radial cracks produced by the Vickers indenter in machined and in annealed ceramics are measured. These are then combined with a fracture mechanics model to estimate the surface residual stresses in the machined ceramics. In order to determine the validity of the indentation technique for estimating machining residual stresses, these stresses were also measured using an X-ray diffraction and a deflection method. The residual stress values determined using the indentation technique in the machined ceramics were found to be reasonably close to those obtained from the X-ray diffraction and deflection methods. Since it is relatively simple and easily applied, the indentation technique appears to be a potentially promising method for evaluating residual stresses in machined ceramics.

Original languageEnglish (US)
Title of host publicationNIST Special Publication
PublisherPubl by Natl Inst of Standards & Technology
Pages135-146
Number of pages12
Edition847
StatePublished - Jun 1993
Externally publishedYes
EventProceedings of the International Conference on Machining of Advanced Materials - Gaithersburg, MD, USA
Duration: Jul 20 1993Jul 22 1993

Other

OtherProceedings of the International Conference on Machining of Advanced Materials
CityGaithersburg, MD, USA
Period7/20/937/22/93

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Fingerprint

Dive into the research topics of 'Measurement of residual stresses in machined ceramics using the indentation technique'. Together they form a unique fingerprint.

Cite this