TY - CONF A1 - Mente, Tobias A1 - Schröpfer, Dirk A1 - Schaupp, Thomas A1 - Kromm, Arne A1 - Kannengießer, Thomas A1 - Böllinghaus, Thomas T1 - Kaltrissbildung in Baustählen im Lichte der Regelwerke - Kaltrissvermeidung in geschweißten Bauteilen aus hochfestem Stahl N2 - Herausforderungen bei der schweißtechnischen Verarbeitung / Welche Rolle spielt der Wasserstoff beim Schweißen? / Vorgewärmt und doch ein Kaltriss? - Wärmeführung beim Schweißen / Abbildung bauteilspezifischer Beanspruchungen im Labormaßstab / Maßnahmen zur Kaltrissvermeidung / Moderne Lichtbogenschweißverfahren T2 - 29. Schweißtechnisches Kolloquium des DVS Bezirksverbandes Hamburg CY - Hochschule für Angewandte Wissenschaften Hamburg, Germany DA - 06.02.2018 KW - Wasserstoffunterstützte Kaltrissbildung KW - Hochfester Feinkornbaustahl KW - Eigenspannungen KW - Einspanngrad KW - Modifizierter Sprühlichtbogen KW - Numerische Simulation PY - 2018 AN - OPUS4-44028 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mente, Tobias A1 - Böllinghaus, Thomas T1 - Mesoscale Crack Model for Duplex Stainless Steel Microstructures T2 - IIW Intermediate Meeting 2012 CY - Cambridge, England DA - 2012-02-20 PY - 2012 AN - OPUS4-25537 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mente, Tobias A1 - Böllinghaus, Thomas T1 - Mesoscale Crack Model for Duplex Stainless Steels Microstructures T2 - IIW Annual Assembly CY - Denver, CO, USA DA - 2012-07-09 PY - 2012 AN - OPUS4-26165 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mente, Tobias A1 - Böllinghaus, Thomas T1 - Mesoscale Model for Hydrogen Assisted Cracking in Two-Phase Microstuctures T2 - 10th International Seminar Numerical Analysis of Weldability CY - Seggauberg, Austria DA - 2012-09-23 PY - 2012 AN - OPUS4-26781 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mente, Tobias A1 - Böllinghaus, Thomas T1 - Mesoscale modelling of hydrogen diffusion in duplex stainless steels T2 - IIW Annual Assembly CY - Chennai, India DA - 2011-07-17 PY - 2011 AN - OPUS4-25035 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mente, Tobias T1 - Mesoskalensimulation zweiphasiger Gefüge unter Nutzung hochenergetischer Beugungsexperimente T2 - MDDK - Master-, Diplomanden-, Doktorandenkolloqium CY - Magdeburg, Germany DA - 2012-01-26 PY - 2012 AN - OPUS4-28131 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mente, Tobias T1 - Modellierung des Materialverhaltens eines Duplexstahls auf Mesoebene T2 - MDDK - Master-, Diplomanden-, Doktorandenkolloqium CY - Magdeburg, Germany DA - 2011-05-26 PY - 2011 AN - OPUS4-28130 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Griesche, Axel A1 - Mente, Tobias A1 - Markötter, Henning A1 - Al-Falahat, M. A1 - Kardjilov, N. T1 - Neutron Bragg edge imaging for in situ mapping of crystallographic phase-transformations and of temperature distributions during GTAW of supermartensitic stainless steel N2 - In Neutron-Bragg-Edge Imaging (NBEI) experiments, we studied the phase transition during butt-welding of supermartensitic steel plates. Gas tungsten arc welding (GTAW) was used with a motorized torch allowing for automated weldments. The austenitization in the heat affected zone (HAZ) underneath the welding head could be clearly visualized at λ = 0.39 nm, a wavelength smaller than the Bragg edge wavelengths of both austenite and martensite. Also, the re-transformation into the martensitic phase upon cooling was detected. However, we observed an unexpected additional change in transmission at λ = 0.44 nm that is a wavelength larger than the wavelength of the Bragg edges of both the martensitic and austenitic phases. We attribute this change to the Deybe-Waller-Factor that describes the temperature dependence of coherent scattering at a crystal lattice. The observed two-dimensional attenuation map corresponds well with a temperature distribution modelling by software macros in ANSYS. Here, the absolute temperature values could be achieved by calibrating the modelled attenuation with help of a thermocouple placed at the steel plate. This allows in return for a direct two-dimensional temperature reading based on the Debye-Waller-relation between neutron attenuation and sample temperature. T2 - ITMNR-9 CY - Buenos Aires, Argentina DA - 12.10.2022 KW - Debye-Waller-Faktor PY - 2023 AN - OPUS4-58627 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mente, Tobias T1 - Numerical investigations on hydrogen-assisted cracking in duplex stainless steel microstructures T2 - 4th WMRIF Young Scientists Workshop CY - Boulder, Colorado, USA DA - 2014-09-08 PY - 2014 AN - OPUS4-32706 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mente, Tobias A1 - Steppan, Enrico A1 - Böllinghaus, Thomas T1 - Numerical simulation of hydrogen assisted cold cracking in welded joints of High strength structural steels T2 - IIW Annual Assembly CY - Denver, CO, USA DA - 2012-07-09 PY - 2012 AN - OPUS4-26164 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -