Stress measurement with non-indentation Metadata
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- Main Title Stress measurement with non-indentation
Author: Jakus, K.Creator Type: PersonalCreator Info: Univ. of Massachusetts, Amherst, MA (United States)
Author: Evans, N.D.Creator Type: PersonalCreator Info: Oak Ridge National Lab., TN (United States). Metals and Ceramics Div.
Author: Hay, J.C.Creator Type: PersonalCreator Info: IBM Research, Yorktown Heights, NY (United States). T.J. Watson Research Center
Sponsor: United States. Department of Energy. Office of Energy Research.Contributor Type: OrganizationContributor Info: USDOE Office of Energy Research, Washington, DC (United States)
Sponsor: National Science Foundation (U.S.)Contributor Type: OrganizationContributor Info: National Science Foundation, Washington, DC (United States)
Name: Oak Ridge National Laboratory. Metals and Ceramics Division.Place of Publication: TennesseeAdditional Info: Oak Ridge National Lab., Metals and Ceramics Div., TN (United States)
Name: Oak Ridge Institute for Science and EducationPlace of Publication: TennesseeAdditional Info: Oak Ridge Inst. for Science and Education, TN (United States)
- Creation: 1998-11
- Content Description: The feasibility of using nano-indentation to measure residual stress in glasses was studied. Indents were placed on the side of flexure specimens at four different distances from the neutral axis while the specimens were under load in four-point-bending. Three different glasses (soda-lime, boro-silicate, and fused silica) were indented with a cube-corner indenter using 2 to 30 mN indentation loads. A high resolution scanning electron microscope was used to measure the length of the cracks emanating from the corners of the indents while the specimen remained under load. The measured crack lengths were correlated to the local stress using indentation theory. For the correlation, elastic beam theory was used to calculate the magnitude of the local stress at the indentation sites. Results derived from crack lengths were in good agreement with local stress within experimental scatter. However, this scatter was found to be rather large as a result of the stochastic nature of crack formation. It can be concluded from this study that nano-indentation can be used to measure residual surface stresses with high spatial resolution provided that a sufficient number of indents are used to assure good statistical accuracy.
- Physical Description: 6 p.
- Keyword: Cracks
- Keyword: Correlations
- STI Subject Categories: 36 Materials Science
- Keyword: Crack Propagation
- Keyword: Glass
- Keyword: Experimental Data
- Keyword: Residual Stresses
- Conference: Innovative materials in advanced energy technologies, Florence (Italy), 14-19 Jun 1998
Name: Office of Scientific & Technical Information Technical ReportsCode: OSTI
Name: UNT Libraries Government Documents DepartmentCode: UNTGD
- Other: DE99000211
- Report No.: ORNL/CP--99248
- Report No.: CONF-980604--
- Grant Number: AC05-96OR22464;AC05-76OR00033
- DOI: 10.2172/676871
- Office of Scientific & Technical Information Report Number: 676871
- Archival Resource Key: ark:/67531/metadc702873
- Display Note: OSTI as DE99000211