Novel approach to image hydrogen distribution and related phase transformation in duplex stainless steels at the sub-micron scale

Oded Sobol, Gert Nolze, Romeo Saliwan-Neumann, Dan Eliezer, Thomas Boellinghaus, Wolfgang E.S. Unger

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

The effect of electrochemical charging of hydrogen on the structure of a lean duplex stainless steel LDX 2101® (EN 1.4162, UNS S32101) was examined by both Time-of-Flight secondary ion mass spectrometry and electron back-scatter diffraction. The goal is to correlate hydrogen concentration and induced structural changes. Chemical and structural characterizations were done for the same region at the sample's surface with sub-micron spatial resolution. Regions of interest were varying in size between 50 × 50 μm and 100 × 100 μm. The results show a phase transformation of austenite to mainly a defect-rich BCC and scarcely a HCP phase. The phase transformation occurred in deuterium rich regions in the austenite.

Original languageEnglish
Pages (from-to)25114-25120
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume42
Issue number39
DOIs
StatePublished - 28 Sep 2017

Keywords

  • Data fusion
  • Electron backscatter diffraction, EBSD
  • Hydrogen assisted cracking
  • Lean duplex stainless steel
  • Time-of-flight secondary ion mass spectrometry, ToF-SIMS

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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