Effects of deformation on hydrogen absorption and desorption properties of titanium

Hiroshi Suzuki, Hisashi Taniguchi, Nobuko Hanada, Kenichi Takai, Yukito Hagihara

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this study, we analyzed the effects of deformation on hydrogen absorption and desorption properties of titanium to improve such properties. Hydrogen was introduced into commercially pure (99.5%) titanium by the electrochemical method. The amount and existing state of hydrogen were examined using hydrogen desorption curves obtained by thermal desorption spectroscopy. Hydrogen absorption was promoted by applying tensile deformation prior to charging, which leads to hydride formation within a short charging time. The amount of hydrogen absorbed decreased when the volume fraction of deformation twins exceeded about 0.2. It was considered that hydrogen was mainly trapped by dislocations forming hydride while a large fraction of deformation twins hindered dislocation motion, thus reducing dislocation density leading to a decrease in the amount of absorbed hydrogen. Almost half the charged hydrogen was released when in-plane compressive stress was applied to a charged plate specimen at room temperature due to hydride decomposition under compressive stress.

Original languageEnglish
Pages (from-to)S759-S762
JournalJournal of Alloys and Compounds
Volume509
Issue numberSUPPL. 2
DOIs
Publication statusPublished - 2011 Sep 1
Externally publishedYes

Keywords

  • Dislocations
  • Hydrogen absorbing material
  • Metal hydrides
  • Strain

ASJC Scopus subject areas

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

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