Investigation of hydrogen-deformation interactions in β-21S titanium alloy using thermal desorption spectroscopy

E. Tal-Gutelmacher, D. Eliezer, Th Boellinghaus

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

The focus of this paper is the investigation of the combined influence of hydrogen and pre-plastic deformation on hydrogen's absorption/desorption behavior, the microstructure and microhardness of a single-phased β-21S alloy. In this study, thermal desorption analyses (TDS) evaluation of various desorption and trapping parameters provide further insight on the relationships between hydrogen absorption/desorption processes and deformation, and their mutual influence on the microstructure and the microhardness of β-21S alloy. TDS spectra were supported by other experimental techniques, such as X-ray diffraction, scanning and transmission electron microscopy, hydrogen quantity analyses and microhardness tests. Pre-plastic deformation, performed before the electrochemical hydrogenation of the alloy, increased significantly the hydrogen absorption capacity. Its influence was also evident on the notably expanded lattice parameter of β-21S alloy after hydrogenation. However, no hydride precipitation was observed. An interesting softening effect of the pre-deformed hydrogenated alloy was revealed by microhardness tests. TDS demonstrated the significant effect of pre-plastic deformation on the hydrogen evolution process. Hydrogen desorption temperature and the activation energy for hydrogen release increased, additional trap states were observed and the amount of desorbed hydrogen decreased.

Original languageEnglish
Pages (from-to)204-209
Number of pages6
JournalJournal of Alloys and Compounds
Volume440
Issue number1-2
DOIs
StatePublished - 16 Aug 2007

Keywords

  • Hydrogen absorption
  • Hydrogen desorption
  • Thermal desorption spectroscopy (TDS)
  • Thermally activated processes
  • Titanium alloys

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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