Effects of neutron irradiation on magnetic first-order reversal curves in reactor pressure vessel steels
Source abstract
Abstract
We report results of measurements of first-order reversal curves (FORCs) for neutron irradiated reactor pressure vessel steels to seek their possible application to a nondestructive evaluation of the irradiation hardening. We find a peak position of the FORC distribution, which is the second derivative of measured FORCs, shifts towards zero field after neutron irradiation, associated with the narrowing of the peak width. The observations indicate the progress of the magnetic softening and magnetic homogeneity under neutron irradiation. The present investigations demonstrate that FORCs can offer additional information on microstructural changes due to neutron irradiation, which can not be obtained by a conventional hysteresis method.
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Research context
OpenAlex topics: Magnetic Properties and Applications · Geomagnetism and Paleomagnetism Studies · Microstructure and Mechanical Properties of Steels
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Affiliations
Department of Materials Science and Engineering, Faculty of Engineering, Iwate University 1 , Ueda 4-3-5, Morioka 020-8551, Japan
Centre for Energy Research, Hungarian Academy of Sciences 2 , H-1121 Budapest, Hungary
Wigner Research Centre for Physics, Hungarian Academy of Sciences 3 , H-1121 Budapest, Hungary
Forschungszentrum Jülich GmbH, Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ) 4 , 85748 Garching, Germany
Funding
Japan Society for the Promotion of Science
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