Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-38678 Zeitschriftenartikel Stegemann, Robert; Cabeza, Sandra; Lyamkin, V.; Bruno, Giovanni; Pittner, Andreas; Wimpory, Robert; Boin, M.; Kreutzbruck, Marc Residual stress characterization of steel TIG welds by neutron diffraction and by residual magnetic stray field mappings The residual stress distribution of tungsten inert gas welded S235JRC+C plates was determined by means of neutron diffraction(ND). Large longitudinal residual stresses with maxima around 600 MPa were found. With these results as reference, the evaluation of residual stress with high spatial resolution GMR (giant magneto resistance) sensors was discussed. The experiments performed indicate a correlation between changes in residual stresses (ND) and the normal component of local residual magnetic stray fields (GMR). Spatial variations in the magnetic field strength perpendicular to the welds are in the order of the magnetic field of the earth. Amsterdam Elsevier 2017 Journal of Magnetism and Magnetic Materials 426 580 587 10.1016/j.jmmm.2016.11.102 2016-12-14 OPUS4-45855 Zeitschriftenartikel Stegemann, Robert; Cabeza, Sandra; Pelkner, Matthias; Lyamkin, Viktor; Pittner, Andreas; Werner, Daniel; Wimpory, R.; Boin, M.; Kreutzbruck, Marc; Bruno, Giovanni Influence of the microstructure on magnetic stray fields of low-carbon steel welds This study examines the relationship between the magnetic mesostructure with the microstructure of low carbon steel tungsten inert gas welds. Optical microscopy revealed variation in the microstructure of the parent material, in the heat affected and fusion zones, correlating with distinctive changes in the local magnetic stray fields measured with high spatial resolution giant magneto resistance sensors. In the vicinity of the heat affected zone high residual stresses were found using neutron diffraction. Notably, the gradients of von Mises stress and triaxial magnetic stray field modulus follow the same tendency transverse to the weld. In contrast, micro-X-ray fluorescence characterization indicated that local changes in element composition had no independent effect on magnetic stray fields. New York Springer US 2018 Journal of Nondestructive Evaluation 37 3 66,1 18 10.1007/s10921-018-0522-0 2018-09-06