Magnetic analysis of nuclear pressure vessel steels and other ferromagnetic materials subject to neutron irradiation and heat treatment
Shong, Wei-Ja
This item is only available for download by members of the University of Illinois community. Students, faculty, and staff at the U of I may log in with your NetID and password to view the item. If you are trying to access an Illinois-restricted dissertation or thesis, you can request a copy through your library's Inter-Library Loan office or purchase a copy directly from ProQuest.
Permalink
https://hdl.handle.net/2142/22654
Description
Title
Magnetic analysis of nuclear pressure vessel steels and other ferromagnetic materials subject to neutron irradiation and heat treatment
Author(s)
Shong, Wei-Ja
Issue Date
1995
Doctoral Committee Chair(s)
Stubbins, James F.
Department of Study
Nuclear, Plasma, and Radiological Engineering
Discipline
Nuclear, Plasma, and Radiological Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Nuclear
Engineering, Metallurgy
Engineering, Materials Science
Language
eng
Abstract
Mechanical and magnetic property changes due to neutron irradiation and heat treatment were investigated for the sake of developing a nondestructive method of monitoring nuclear pressure vessel steel embrittlement during reactor operation. Four kinds of samples, including pressure vessel steel, pure Fe and Ni, Fe-Cu alloys and Charpy surveillance coupons, were examined. An automated magnetic property measuring system was constructed and measuring schemes were established. Microhardness and magnetic coercivity, remanence, permeability, and hysteresis loss were measured as a function of a variety of irradiation and annealing exposures. The results were interpreted in terms of dislocation and magnetic domain wall pinning mechanisms and internal stress relaxation. It is found that the pinning mechanisms of dislocations and domain walls are different with respect to the effective pinning parameters. However, stress relaxation has similar effects on both microhardness and magnetic coercivity. It is concluded that the selection of testing material, specimen size and shape, and magnetizing scheme are important factors for constructing a nondestructive testing method for reactor pressure vessel surveillance.
Use this login method if you
don't
have an
@illinois.edu
email address.
(Oops, I do have one)
IDEALS migrated to a new platform on June 23, 2022. If you created
your account prior to this date, you will have to reset your password
using the forgot-password link below.
