Investigation of Fe-1.0% Cu surrogate specimens with nonlinear ultrasound |
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| Affiliation: | 1. G.W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA;2. School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA;3. Electric Power Research Institute, Charlotte, NC 28262, USA;4. Korea Atomic Energy Research Institute, Daeduk, Taejon 305-353, South Korea;1. LUNAM université, IFSTTAR, CS4, 44344 Bouguenais, France;2. University of Bordeaux, I2M, 33 400 Talence, France;3. LMDC, INSA/UPS Génie Civil, 135 Avenue de Rangueil, 31077 Toulouse cedex 04, France;1. Robert Bosch GmbH, Germany;2. Department of Engineering and Natural Sciences, University of Applied Sciences Merseburg, Germany;3. Dresden University of Technology, Germany;1. School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;2. Univ. Bordeaux, CNRS, Bordeaux INP, Arts et métiers Paris Tech, I2M UMR 5295, F-33400 Talence, France |
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| Abstract: | This research explores the sensitivity of nonlinear ultrasound (NLU) to the changes in microstructure of heat treated Fe-1.0 at.% Cu binary alloy. Results from experimental measurements and a theoretical model each show that the acoustic nonlinearity parameter, β increases with increasing Cu-precipitate radius. The iron-copper material investigated in this research serves as a surrogate material to simulate the evolution of radiation damage as a result of copper nanocluster precipitation that occurs in reactor pressure vessels (RPV) of light water nuclear power reactors. With RPVs seeing more neutron cycles than originally anticipated, it is imperative to develop nondestructive evaluation (NDE) techniques capable of evaluating the integrity of these structures. |
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