Subsurface and Bulk Residual Stress Analysis of S235JRC + C Steel TIG Weld by Diffraction and Magnetic Stray Field Measurements

Abstract Background Due to physical coupling between mechanical stress and magnetization in ferromagnetic materials, it is assumed the literature that distribution of magnetic stray field corresponds internal (residual) specimen. The correlation is, however, not trivial, since also influenced by microstructure geometry component. understanding residual could help evaluate integrity welded components. Objective This study aims at possible subsurface bulk with a low carbon steel weld. Methods was determined synchrotron X-ray diffraction (SXRD, region) neutron (ND, region). SXRD possesses higher spatial resolution than ND. Magnetic fields were mapped utilizing high-spatial-resolution giant magneto resistance (GMR) sensors. Results overall correlates better stress. especially visible regions outside heat affected zone, where influence microstructural features less pronounced but steep gradients are present. Conclusions It demonstrated localized sources without any obvious variations associated gradients. good signal indicates source be found range penetration depth measurements.