About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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30 Years of Nanoindentation with the Oliver-Pharr Method and Beyond
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Presentation Title |
A Novel Indentation-size-effect-based Nanoindentation Test Method Enabling Smaller Scale Testing for Safer Nuclear Structural Health Monitoring |
Author(s) |
Rohit Sharma, Nigel M. Jennett, Chris D. Hardie, Alexandra J. Cackett |
On-Site Speaker (Planned) |
Rohit Sharma |
Abstract Scope |
Low-carbon Nuclear energy provides 10% of global electricity. Periodically, radiation damage is monitored by destructively testing Surveillance samples irradiated by the reactor. A smaller-scale Nanoindentation test would improve safety: reducing sample radioactivity/waste, and allowing more tests. We analyse spherical indentation data (Cu single crystal) from the EMPIR (EU/EURAMET) Strength-ABLE project using the Hou and Jennett (2012) algorithm, which relates hardness to plastic zone size and dislocation-dislocation interaction distance. An input of (easily-measured) indentation size effect, is combined with a measurement of Plastic zone size to give quantified estimates of the absolute dislocation-dislocation interaction distance and the fraction of dislocation density that is mobile; values otherwise very difficult to obtain. When this novel nanoindentation test method is applied to nuclear materials it generates new figures-of-merit to quantify damage that will be valuable for materials selection and for safer structural health monitoring of metal embrittlement by long-term exposure to irradiation. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Characterization, Nuclear Materials |