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The Compelling Case for Indentation as a Functional Exploratory and Characterization Tool

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cam.issuedOnline2015-07-30
dc.contributor.authorMarshall, DB
dc.contributor.authorCook, RF
dc.contributor.authorPadture, NP
dc.contributor.authorOyen, ML
dc.contributor.authorPajares, A
dc.contributor.authorBradby, JE
dc.contributor.authorReimanis, IE
dc.contributor.authorTandon, R
dc.contributor.authorPage, TF
dc.contributor.authorPharr, GM
dc.contributor.authorLawn, BR
dc.contributor.orcidOyen, Michelle [0000-0002-3428-748X]
dc.date.accessioned2015-06-18T11:27:24Z
dc.date.available2015-06-18T11:27:24Z
dc.date.issued2015
dc.description.abstract<jats:p>The utility of indentation testing for characterizing a wide range of mechanical properties of brittle materials is highlighted in light of recent articles questioning its validity, specifically in relation to the measurement of toughness. Contrary to assertion by some critics, indentation fracture theory is fundamentally founded in Griffith–Irwin fracture mechanics, based on model crack systems evolving within inhomogeneous but well‐documented elastic and elastic–plastic contact stress fields. Notwithstanding some numerical uncertainty in associated stress intensity factor relations, the technique remains an unrivalled quick, convenient and economical means for comparative, site‐specific toughness evaluation. Most importantly, indentation patterns are unique fingerprints of mechanical behavior and thereby afford a powerful functional tool for exploring the richness of material diversity. At the same time, it is cautioned that unconditional usage without due attention to the conformation of the indentation patterns can lead to overstated toughness values. Limitations of an alternative, more engineering approach to fracture evaluation, that of propagating a precrack through a “standard” machined specimen, are also outlined. Misconceptions in the critical literature concerning the fundamental nature of crack equilibrium and stability within contact and other inhomogeneous stress fields are discussed.</jats:p>
dc.description.versionThis is the author accepted manuscript. The final version is available from Wiley via http://dx.doi.org/10.1111/jace.13729
dc.identifier.citationMarshall et al. Journal of the American Ceramic Society (2015) Vol. 98, Issue 9, pp. 2671-2680. doi: 10.1111/jace.13729
dc.identifier.eissn1551-2916
dc.identifier.issn0002-7820
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/248541
dc.languageEnglish
dc.language.isoeng
dc.publisherWiley
dc.publisher.urlhttp://dx.doi.org/10.1111/jace.13729
dc.rioxxterms.funderEPSRC
dc.rioxxterms.funderNSF
dc.rioxxterms.projectidCMMI 1069165
dc.subject40 Engineering
dc.subject4016 Materials Engineering
dc.subjectBioengineering
dc.titleThe Compelling Case for Indentation as a Functional Exploratory and Characterization Tool
dc.typeArticle
prism.endingPage2680
prism.publicationDate2015
prism.publicationNameJournal of the American Ceramic Society
prism.startingPage2671
prism.volume98
rioxxterms.licenseref.startdate2015-07-30
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.typeJournal Article/Review
rioxxterms.versionofrecord10.1111/jace.13729

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