Welding problems - Investigations with neutrons of residual stress and of hydrogen diffusion in steels
- We report about investigations of typical material problems in steels. First, residual stresses in and around weld seams with low martensite transition temperature filler material were analyzed w/ and w/o additional transverse tensile load. The investigation was accompanied by x-ray diffraction measurements to track stress-induced phase transitions. Martensite formation during welding under external load yield strain gradients near the surface that improve the integrity of the weld. Further, the residual stress distribution close to laser-treated steel surfaces was analyzed. The method could be improved to reduce analysis artifacts. Finally, hydrogen diffusion in different steels was measured using neutron radiography and subsequent image analysis. Diffusion coefficients were derived by analyzing the time-dependent mass flux. In an outlook we describe the optimal ESS instrumentation from a metallurgists point of view.
Autor*innen: | Axel GriescheORCiD |
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Koautor*innen: | J. Altenkirch, J. Gibmeier, Katrin Beyer, Arne KrommORCiD, Thomas KannengießerORCiD |
Dokumenttyp: | Vortrag |
Veröffentlichungsform: | Präsentation |
Sprache: | Deutsch |
Titel des übergeordneten Werkes (Deutsch): | ESS Workshop "Science Vision for the European Spallation Source - German Perspectives" |
Jahr der Erstveröffentlichung: | 2011 |
Veranstaltung: | ESS Workshop "Science Vision for the European Spallation Source - German Perspectives" |
Veranstaltungsort: | Bad Reichenhall, Germany |
Beginndatum der Veranstaltung: | 2011-10-10 |
Enddatum der Veranstaltung: | 2011-10-12 |
URL: | http://www.fz-juelich.de/cae/servlet/contentblob/1058986/publicationFile/24649/Griesche_pdf.pdf |
URL: | http://www.fz-juelich.de/sid_BD693DF17F42B3018726EE5C2558C56C/jcns/EN/Leistungen/ConferencesAndWorkshops/ESS/_node.html |
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
Datum der Freischaltung: | 19.02.2016 |
Referierte Publikation: | Nein |
Eingeladener Vortrag: | Nein |