title: Real Time Imaging of Deuterium in a Duplex Stainless Steel Microstructure by Time-of-Flight SIMS.
abstract: For more than one century, hydrogen assisted degradation of metallic microstructures has been identified as origin for severe technical component failures but the mechanisms behind have not yet been completely understood so far. Any in-situ observation of hydrogen transport phenomena in microstructures will provide more details for further elucidation of these degradation mechanisms. A novel experiment is presented which is designed to elucidate the permeation behaviour of deuterium in a microstructure of duplex stainless steel (DSS). A hydrogen permeation cell within a TOF-SIMS instrument enables electrochemical charging with deuterium through the inner surface of the cell made from DSS. The outer surface of the DSS permeation cell exposed to the vacuum has been imaged by TOF-SIMS vs. increasing time of charging with subsequent chemometric treatment of image data. This in-situ experiment showed evidently that deuterium is permeating much faster through the ferrite phase than through the austenite phase. Moreover, a direct proof for deuterium enrichment at the austenite-ferrite interface has been found.
authors.affiliation: BAM - Federal Institute for Materials Research and Testing, Unter den Eichen 87, D-12205 Berlin, Germany.
authors.forename: O
authors.initials: O
authors.lastname: Sobol
authors.affiliation: BAM - Federal Institute for Materials Research and Testing, Unter den Eichen 87, D-12205 Berlin, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Straub
authors.affiliation: BAM - Federal Institute for Materials Research and Testing, Unter den Eichen 87, D-12205 Berlin, Germany.
authors.forename: Th
authors.initials: T
authors.lastname: Wirth
authors.affiliation: BAM - Federal Institute for Materials Research and Testing, Unter den Eichen 87, D-12205 Berlin, Germany.
authors.forename: G
authors.initials: G
authors.lastname: Holzlechner
authors.affiliation: BAM - Federal Institute for Materials Research and Testing, Unter den Eichen 87, D-12205 Berlin, Germany.
authors.forename: Th
authors.initials: T
authors.lastname: Boellinghaus
authors.affiliation: BAM - Federal Institute for Materials Research and Testing, Unter den Eichen 87, D-12205 Berlin, Germany.
authors.forename: W E S
authors.initials: WE
authors.lastname: Unger
references.citation: Adv Mater. 2010 Mar 12;22(10):1128-35
references.pmid: 20217854
references.citation: Nat Mater. 2013 Feb;12(2):145-51
references.pmid: 23142843
references.citation: Nat Commun. 2015 Feb 05;6:6164
references.pmid: 25652438