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Title: Simulation of magnetic hysteresis loops and magnetic Barkhausen noise of α-iron containing nonmagnetic particles

The magnetic hysteresis loops and Barkhausen noise of a single α-iron with nonmagnetic particles are simulated to investigate into the magnetic hardening due to Cu-rich precipitates in irradiated reactor pressure vessel (RPV) steels. Phase field method basing Landau-Lifshitz-Gilbert (LLG) equation is used for this simulation. The results show that the presence of the nonmagnetic particle could result in magnetic hardening by making the nucleation of reversed domains difficult. The coercive field is found to increase, while the intensity of Barkhausen noise voltage is decreased when the nonmagnetic particle is introduced. Simulations demonstrate the impact of nucleation field of reversed domains on the magnetization reversal behavior and the magnetic properties.
Authors:
; ;  [1] ;  [2] ;  [1] ; ;  [3]
  1. School of Material Science and Engineering, Tsinghua University, Beijing, 100084 (China)
  2. (China)
  3. Energy Materials Division, Pacific Northwest National Laboratory, Richland, WA, 99352 (United States)
Publication Date:
OSTI Identifier:
22492271
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 7; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COMPUTERIZED SIMULATION; ELECTRIC POTENTIAL; HARDENING; HYSTERESIS; IRON; IRRADIATION; MAGNETIC PROPERTIES; MAGNETIZATION; NOISE; NUCLEATION; PARTICLES; PRECIPITATION; PRESSURE VESSELS; REACTOR MATERIALS; STEELS