Mechanisms of hydrogen embrittlement in high-strength aluminum alloys containing coherent or incoherent dispersoids

Mahdieh Safyari, Masoud Moshtaghi, Tomohiko Hojo, Eiji Akiyama

Research output: Contribution to journalArticleResearchpeer-review

5 Citations (Scopus)


This study investigated the hydrogen embrittlement of a high strength Zr or Cr- added aluminum alloy specimens containing coherent Al3Zr or incoherent Al18Mg2Cr3 dispersoids, respectively. The elastic interaction between coherency strain and hydrogen leads to the accumulation of hydrogen at Al3Zr dispersoids and an additional peak in the thermal desorption spectra. For Al18Mg2Cr3 dispersoids, the elastic strain induced by lattice misfit decreases by the introduction of the misfit dislocations leading to hydrogen trapping by misfit dislocations. The obtained results firstly revealed that the presence of coherent Al3Zr dispersoids in the matrix results in a superior hydrogen embrittlement resistance of the alloy.
Original languageEnglish
Article number109895
Number of pages14
JournalCorrosion science
Issue numberJanuary
Early online date20 Oct 2021
Publication statusPublished - Jan 2022

Bibliographical note

Funding Information:
M. Safyari gratefully acknowledges the financial support of Kamei Corporation, Japan. Also, this work was supported by JSPS Japan KAKENHI Grant Number JP17H03406 and by the Light Metal Educational Foundation, Inc. Special thanks are given to S. Kuramoto, M. Koyama, F. Abbasi, and G. Itoh for advice and support.

Publisher Copyright:
© 2021 Elsevier Ltd


  • AlZr
  • Aluminum alloy
  • Hydrogen embrittlement
  • Hydrogen trapping
  • Interfaces

Cite this