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Title: The compelling case for indentation as a functional exploratory and characterization tool

Journal Article · · Journal of the American Ceramic Society
DOI:https://doi.org/10.1111/jace.13729· OSTI ID:1235351
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [9];  [10];  [3]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Teledyne Scientific Co., Thousand Oaks, CA (United States)
  3. National Institute of Standards and Technology, Gaithersburg, MD (United States)
  4. Brown Univ., Providence, RI (United States)
  5. Cambridge Univ., Cambridge (United Kingdom)
  6. Univ. de Extremadura, Badajoz (Spain)
  7. Australian National Univ., Canberra (Australia)
  8. Colorado School of Mines, Golden, CO (United States)
  9. Newcastle Univ., Newcastle Upon Tyne (United Kingdom)
  10. Univ. of Tennessee, Knoxville, TN (United States)

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.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000; DE‐FG02‐10ER4677; DE‐FG02‐07ER46397
OSTI ID:
1235351
Alternate ID(s):
OSTI ID: 1400721
Report Number(s):
SAND-2015-4302J; 590426
Journal Information:
Journal of the American Ceramic Society, Vol. 98, Issue 9; ISSN 0002-7820
Publisher:
American Ceramic SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 59 works
Citation information provided by
Web of Science

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Cited By (10)

Processing of fiber‐reinforced ultra‐high temperature ceramic composites: A review
  • Rueschhoff, Lisa M.; Carney, Carmen M.; Apostolov, Zlatomir D.
  • International Journal of Ceramic Engineering & Science, Vol. 2, Issue 1 https://doi.org/10.1002/ces2.10033
journal December 2019
Increasing Fracture Toughness and Transmittance of Transparent Ceramics using Functional Low-Thermal Expansion Coatings journal October 2018
BaTiO 3 -based piezoelectrics: Fundamentals, current status, and perspectives journal December 2017
Design and testing of a cryogenic indentation apparatus journal January 2019
Sintering of carbon nanotube-reinforced zirconia-toughened alumina composites prepared by uniaxial pressing and cold isostatic pressing journal August 2018
Effect of sintering duration on the sliding‐wear resistance of 3Y‐TZP dental ceramics
  • Alonso, Javier; Rodríguez‐Rojas, Fernando; Borrero‐López, Oscar
  • International Journal of Applied Ceramic Technology, Vol. 16, Issue 5 https://doi.org/10.1111/ijac.13291
journal May 2019
Durable aluminate toughened zirconate composite thermal barrier coating ( TBC ) materials for high temperature operation journal February 2019
The impact of densification on indentation fracture toughness measurements journal September 2019
A critical evaluation of indentation crack lengths in air journal December 2019
Future of nanoindentation in archaeometry journal August 2018

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