Abstract
Instrumented indentation testing provides the means to measure many mechanical properties and characteristics of materials. One such mechanical property that can be ascertained from indentation testing is a material's yield stress, the stress corresponding to the onset of permanent deformation. In britde materials such as ceramics and glasses, traditional testing methods fall short of precisely establishing the yield stress. A new technique to estimate the yield stress is under development and described here. It utilizes the sensing and interpreting of the initiation of a residual surface impression through the change of the instantaneous contact-stiffness3/load (S3/P) as measured by load and depth-sensing indentation with spherical indenters. Several brittle materials (borosilicate, soda-lime silicate, and bulk metallic glass) are evaluated, and the test method and manner of interpreting the yield-like response through S3/P are described.
Original language | English |
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Title of host publication | Ceramic Engineering and Science Proceedings |
Editors | Jerry LaSalvia, Palani Balaya, Tatsuki Ohji, Zhengyi Fu, Jonathan Salem, Peter Mechnich, Mihails Kusnezoff, Dietmar Koch, Narottam Bansal |
Publisher | American Ceramic Society |
Pages | 61-71 |
Number of pages | 11 |
Edition | 2 |
ISBN (Electronic) | 9781119519645, 9781119543268, 9781119543305 |
State | Published - 2019 |
Event | 42nd International Conference on Advanced Ceramics and Composites, ICACC 2018 - Daytona Beach, United States Duration: Jan 21 2018 → Jan 26 2018 |
Publication series
Name | Ceramic Engineering and Science Proceedings |
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Number | 2 |
Volume | 39 |
ISSN (Print) | 0196-6219 |
Conference
Conference | 42nd International Conference on Advanced Ceramics and Composites, ICACC 2018 |
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Country/Territory | United States |
City | Daytona Beach |
Period | 01/21/18 → 01/26/18 |
Funding
Research sponsored by the US Army Research Office (US ARO) under Grant No. W911NF-15-1-0614 through the University of Tennessee - Knoxville. The authors thank US ARO's D. Stepp for financial support. The authors would also like to thank Oak Ridge National Laboratory's R. Parten and T. Geer for specimen machining and polishing, respectively.