• Stegemann, R.; Cabeza, S.; Lyamkin, V.; Bruno, G.; Pittner, A.; Wimpory, R.; Boin, M.; Kreutzbruck, M.: Residual Stress Characterization of Steel TIG Welds by Neutron Diffraction and by Residual Magnetic Stray Field Mappings. Journal of Magnetism and Magnetic Materials 426 (2017), p. 580-587

10.1016/j.jmmm.2016.11.102

Abstract:
The residual stress distribution of tungsten inert gas welded S235JRC+C plates was determined by means of neutron diffraction. This investigation leads to the discovery of dominating longitudinal residual stresses with maxima around View the MathML source600MPa. With these results as reference, the evaluation of residual stress with high spatial resolution GMR (giant magneto resistance) sensors is discussed. The experiments performed indicate an interdependence of residual stress changes and the normal component of local residual magnetic stray fields. Spatial variations in the magnetic field strength perpendicular to the welds are in the order of the magnetic field of the earth.