Abstract
This study investigates the magnetic properties and structure of 09G2S steel samples fabricated using casting and selective laser melting methods. Fatigue bending tests with cantilever fixation were performed to analyze these properties. It was found that the fatigue curve for 3D-printed steel lies below that of cast steel with a similar chemical composition. Both the coercive force and residual magnetic induction are lower near the fracture site. The greater the number of cycles to failure, the smaller the difference in coercive force and residual magnetic induction in different parts of the sample. The nature of fatigue failure differs between cast and 3D-printed steel. The cast 09G2S steel sample exhibits a straight and homogeneous fatigue fracture without visible crack initiation sites. In contrast, the 3D-printed steel samples show heterogeneous fractures with localized zones of failure and tear-off ridges.
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