Hydrogen embrittlement in titanium alloys

D. Eliezer, C. E. Şerban

Research output: Contribution to journalArticlepeer-review


In this paper the phenomena of hydrogen cracking and hydrogen-induced second phases formation in titanium based alloys is discussed, addressing to two different alloys; the alpha+beta Ti-6Al-4V alloy and the Ti-20 wt%Nb refractory alloy. The prior microstructure of the alloy plays a very significant role on its behavior under exposure to a hydrogen-containing environment In the Ti-6Al-4V alloy the main mechanism of hydrogen cracking is the formation and rupture of brittle titanium hydride phases. The severity of hydrogen degradation in the Ti-6Al-4V alloy depends on the amount and distribution of the β phase in the microstructure due to a more rapid diffusion transport of hydrogen in the bcc β phase. In the Ti-20 wt%Nb alloy hydrogen-induced phase transitions and hydrides formation were followed by an interesting softening effect, irrespective of the charging procedure.

Original languageEnglish
Pages (from-to)13-16
Number of pages4
JournalMetalurgia International
Issue numberSPEC. ISS. 3
StatePublished - 26 Mar 2009


  • Cracking
  • Hydrides
  • Ti-6Al-4V
  • Ti-Nb alloys
  • Titanium alloys

ASJC Scopus subject areas

  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry


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