In situ analysis of hydrogen behaviour in stainless steels by high energy synchrotron radiation

E. Dabah, Th Kannengiesser, D. Eliezer, Th Boellinghaus

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Hydrogen generally causes lattice distortions and phase transformations when introduced into a metal matrix. The present contribution provides a report of first in situ investigations of hydrogen effects on the lattice of the austenite and the martensite phase in a supermartensitic stainless steel using hard synchrotron radiation for respective energy dispersion diffraction measurements. Lattice distortions, such as the planar spacing expansion, have been monitored during the complete hydrogen effusion process over 24. h and are directly correlated to the dissolved hydrogen in the metal matrix. Among other results, it turned out that hydrogen at the introduced concentration level causes a reversible lattice expansion and after hydrogen effusion the lattice nearly regained its original dimensions. Hydrogen much more significantly affects the austenite phase with respect to lattice expansion than the martensite phase, but no phase transformations occur during the hydrogen desorption process.

Original languageEnglish
Pages (from-to)1608-1614
Number of pages7
JournalMaterials Science and Engineering: A
Volume528
Issue number3
DOIs
StatePublished - 25 Jan 2011

Keywords

  • Energy dispersive X-ray diffraction
  • Hydrogen diffusion
  • Lattice distortions
  • Solubility

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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