Austenitic stainless steel SUS304 is typically classified as a paramagnetic material, but it forms ferromagnetic martensite phase due to plastic deformation, stress or fatigue. This martensitic transformation can be applied to magnetic Non-Destructive Evaluation (NDE) technics. In this paper, we attempt to detect and estimate the artificially introduced notch, fatigue crack and fatigued part in SUS304 steel by measuring the Magnetic Flux Leakage (MFL) near the specimen surface. It is fo und that the notch ...
英字タイトル:
Evaluation of Fatigue and Damage in SUS304 using Magnetic Flux Leakage

Ferromagnetic materials have the interaction between mechanical and magnetic fields which is called the magnetomechanical coupling. Typical examples of such couplings are the magnetostriction and dependen ce of the stress strain relation on the magnetic field. The magnetoacoustic effect focused in this paper is also one of the magnetomechanical couplings. It has been shown that from the effect there exists the correlation of the plastic strain and the ultrasonic velocity change due to the magnetization. Th...
英字タイトル:
Non-Destructive Evaluation of Plastic Deformation of Steelusing Magnetoelastic Coupling Effect