残留磁気法によるステンレス鋼の平面曲げ疲労評価

抄録

Conventional non-destructive testing methods cannot necessarily estimate the amount of fatigue damage. If this can be estimated, the service life of a structure can be extended and accidents can be prevented. We measured the magnetic flux density caused by residual magnetization in order to estimate the amount of fatigue damage to austenitic stainless steel plates (SUS304), using a fluxgate sensor. Our experiments showed that the residual magnetization is clearly dependent on an increase in the plane bending stress and the number of stress cycles. This paper discusses the evaluation of plane bending fatigue in austenitic stainless steel plates using residual magnetization.