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

Mahdieh Safyari, Masoud Moshtaghi, Tomohiko Hojo, Eiji Akiyama

Publikation: Beitrag in FachzeitschriftArtikelForschungBegutachtung

5 Zitate (Scopus)

Abstract

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.
OriginalspracheEnglisch
Aufsatznummer109895
Seitenumfang14
FachzeitschriftCorrosion science
Jahrgang194.2022
AusgabenummerJanuary
Frühes Online-Datum20 Okt. 2021
DOIs
PublikationsstatusVeröffentlicht - Jan. 2022

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