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.
| Original language | English |
|---|---|
| Article number | 109895 |
| Number of pages | 14 |
| Journal | Corrosion science |
| Volume | 194.2022 |
| Issue number | January |
| Early online date | 20 Oct 2021 |
| DOIs | |
| Publication status | Published - 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
Keywords
- AlZr
- Aluminum alloy
- Hydrogen embrittlement
- Hydrogen trapping
- Interfaces