Magnetic Barkhousen Noise, Magnetic Incremental Permeability and Magnetic Flux Leakage methods are non-destructive evaluation methods for ferromagnetic materials. Reduced Activation Ferritic/Martensitic (RAFM) steel is a new kind of ferromagnetic material considered to be an important candidate structural material for thermal nuclear fusion reactors. The feasibility to use magnetic non-destructive evaluation techniques of MBN, MIP and MFL methods to evaluate the plastic strains in RAFM steel is experimental...
英字タイトル:
Nondestructive Evaluation for Small Plastic Deformation and Deformation Histories in Reduced-activation Ferritic/Martensitic Steels

During manufacturing and operation, delamination and surface cracks may be initiated in the plasma-facing components (PFCs) of Tokamak devices. To ensure the quality of the PFCs and safety of Tokamak, NDT techniques of different method are needed. This paper introduces recent researches of authors on UT and laser thermography techniques for inspection of PFCs during manufacturing and in-service. For W/Cu mono-block of divertors, the bonding quality was qualified by using the rotating UT with a focus probe. ...
英字タイトル:
Some Researches on UT and Laser Thermography for NDT Tokamak Plasma-Facing Components