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Energy dispersive synchrotron diffraction for in-situ analyses of hydrogen behavior in steels

  • The extent of hydrogen embrittlement phenomenon is dependent on the interaction of hydrogen with the material i.e. diffusion behavior, lattice distortions, phase transformations and residual stresses developments. For the better understanding of the hydrogen interaction with the metal, possibilities of performing in-situ observations of the mentioned factors has to be accomplished. The EDDI (Energy Dispersive Diffraction) beamline at the BESSY II facility in Berlin provides this possibility and was used in order to investigate the aspects of this phenomenon in in-situ scale. The energy dispersive method entails a synchrotron X-ray white beam with a wide energy range (20–120 keV) which allows a fixed position of the sample and the detector, and combined with the high photons flux it allows a very short measurement time for obtaining a full scale X-Ray Diffraction patterns. In this contribution, the successful usage of high energy X-rays, applied for the first time for hydrogenThe extent of hydrogen embrittlement phenomenon is dependent on the interaction of hydrogen with the material i.e. diffusion behavior, lattice distortions, phase transformations and residual stresses developments. For the better understanding of the hydrogen interaction with the metal, possibilities of performing in-situ observations of the mentioned factors has to be accomplished. The EDDI (Energy Dispersive Diffraction) beamline at the BESSY II facility in Berlin provides this possibility and was used in order to investigate the aspects of this phenomenon in in-situ scale. The energy dispersive method entails a synchrotron X-ray white beam with a wide energy range (20–120 keV) which allows a fixed position of the sample and the detector, and combined with the high photons flux it allows a very short measurement time for obtaining a full scale X-Ray Diffraction patterns. In this contribution, the successful usage of high energy X-rays, applied for the first time for hydrogen behavior observations, provided the ability for evaluating in-situ the hydrogen diffusion behavior and the hydrogen interaction with stresses fields in the material. Steel samples were charged with hydrogen and examined by Synchrotron radiation. Two different methods were used in this research; the first is diffusible hydrogen concentration evaluation extracted from the lattice distortions, i.e. changes of the lattice parameter. The second is calculation of the residual stresses present in the sample and the interaction of hydrogen with them, using the known sin2ψ method.zeige mehrzeige weniger

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Metadaten
Autor*innen:Thomas KannengießerORCiD, Eitan Dabah
Persönliche Herausgeber*innen:F. Marquis
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Graue Literatur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):PRICM-8 - 8th Pacific rim international congress on advanced materials and processing
Jahr der Erstveröffentlichung:2013
Herausgeber (Institution):The Minerals, Metals & Materials Society (TMS)
Erste Seite:3481
Letzte Seite:3487
Freie Schlagwörter:Energy dispersive diffraction; Hydrogen diffusion; Hydrogen embrittlement; Residual stresses
Veranstaltung:PRICM-8 - 8th Pacific rim international congress on advanced materials and processing
Veranstaltungsort:Waikoloa, Hawaii, USA
Beginndatum der Veranstaltung:04.08.2013
Enddatum der Veranstaltung:09.08.2013
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:20.02.2016
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:26.08.2013
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