Imaging of Hydrogen in Steels with Neutrons
- Cold neutrons are predominantly scattered at hydrogen when penetrating hydrogen-charged samples, resulting in a high image contrast between hydrogen and e.g. iron. The used radiographic set-ups consist of a neutron source, state-of-the-art scintillator screens and digital cameras. This allows monitoring diffusive hydrogen fluxes two-dimensionally with 20s temporal resolution. Such hydrogen fluxes can be quantified by using standards with known hydrogen content and similar sample thickness. Neutron tomography generates three-dimensional models of the hydrogen distribution in steel. Such models gain new insight for damage analysis by showing the hydrogen accumulations around cracks and by enabling the hydrogen gas pressure estimation inside cracks. The capabilities and limitations, as well as perspectives of this method will be discussed and illustrated with help of selected examples.
Autor*innen: | Axel GriescheORCiD |
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Weitere Person: | Eitan Dabah, Beate Pfretzschner, Thomas SchauppORCiD, Thomas KannengießerORCiD |
Dokumenttyp: | Vortrag |
Veröffentlichungsform: | Präsentation |
Sprache: | Englisch |
Jahr der Erstveröffentlichung: | 2016 |
DDC-Klassifikation: | Naturwissenschaften und Mathematik / Chemie / Analytische Chemie |
Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten | |
Freie Schlagwörter: | Hydrogen embrittlement; Neutron imaging; Neutron radiography; Neutron tomography |
Veranstaltung: | MS&T 2016 |
Veranstaltungsort: | Salt Lake City, Utah, USA |
Beginndatum der Veranstaltung: | 23.10.2016 |
Enddatum der Veranstaltung: | 27.10.2016 |
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
Datum der Freischaltung: | 03.11.2016 |
Referierte Publikation: | Nein |
Eingeladener Vortrag: | Nein |