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Title: Insight on the inconsistencies of Barkhausen signal measurements for radiation damage on nuclear reactor steel

This paper focuses on the use of magnetic measurements, using Barkhausen signals to determine the irradiation effects, attempting to predict fracture toughness changes on nuclear reactor structural materials and correlating these measurements to mechanical testing and microstructure. For this study, two types of nuclear reactor materials were investigated: one sensitive to irradiation effects, the JRQ IAEA's reference material (A533B- -type); and one resistant material, 15KH2MFA WWER's reactor pressure vessel steel. The samples were carefully identified within the original heat block, i.e. forged or rolled plate. These calibrated samples were irradiated at different neutron fluences up to 10{sup 23} n/m{sup 2}. We show how microstructural anisotropy can mask the irradiation effects in the magnetic measurements. A correlation between irradiation effects and the magnetic measurements is explained based on this study.
Authors:
;  [1] ; ; ; ;  [2]
  1. Materials Engineering, The Open University, Walton Hall, Milton Keynes, MK7 6AA (United Kingdom)
  2. Hungarian Academy of Sciences Centre for Energy Research (MTA EK), P.O. Box 49 H-1525, Budapest 114 (Hungary)
Publication Date:
OSTI Identifier:
22263741
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1581; Journal Issue: 1; Conference: 40. annual review of progress in quantitative nondestructive evaluation, Baltimore, MD (United States), 21-26 Jul 2013, 10. international conference on Barkhausen noise and micromagnetic testing, Baltimore, MD (United States), 21-26 Jul 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANISOTROPY; FRACTURE PROPERTIES; IRRADIATION; MICROSTRUCTURE; NEUTRON FLUENCE; PRESSURE VESSELS; RADIATION EFFECTS; SIGNALS; STEELS; WWER TYPE REACTORS