Abstract
Fiber-optic sensors can be used to measure distributed strain and temperature during AM to aid in the material qualification process and during nuclear operation of AM components. However, fiber strain sensing requires that fibers be properly bonded to the surrounding metal matrix. This work explored the use of UAM and LPBF AM processes for additively building material, housing the sensors, and building over the top of the sensor to effectively embed the sensor in the component. Optical microscopy of the embedded fibers showed acceptable bonding over the top of the sensor with little space between the fiber and channel walls. Moreover, fiber strain was recorded during controlled heating experiments at various temperatures using OFDR interrogation. The measured fiber strain agreed well with the expected thermal strain from the changes in thermal expansion between the smaller mass of the fiber and larger mass of the SS316 matrix. This work demonstrated the ability to embed sensors in metals with AM processes and to accurately record strain at relevant high temperatures.
Original language | English |
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Pages (from-to) | 496-499 |
Number of pages | 4 |
Journal | Transactions of the American Nuclear Society |
Volume | 127 |
Issue number | 1 |
DOIs | |
State | Published - 2022 |
Event | 2022 Transactions of the American Nuclear Society Winter Meeting and Technology Expo, ANS 2022 - Phoenix, United States Duration: Nov 13 2022 → Nov 17 2022 |
Funding
This work was supported by the US Department of Energy’s Office of Nuclear Energy, including the Advanced Materials and Manufacturing Technologies Program and the Microreactor Program. 1This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).