Suppression of Hydrogen Embrittlement due to Local Partitioning of Hydrogen to Dispersed Intermetallic Compound Particles in Al–Zn–Mg–Cu Alloys

Fujihara Hiro, Shimizu Kazuyuki, Toda Hiroyuki, Takeuchi Akihisa, Uesugi Masayuki

doi:10.2320/matertrans.mt-l2022007

<p>Recent studies have revealed that hydrogen embrittlement in Al–Zn–Mg alloys appears to be dominated by hydrogen partitioning to MgZn₂ precipitates. A method has recently been proposed for reducing the hydrogen concentration at MgZn₂ precipitates by adding specific intermetallic compound particles that have high hydrogen trap energy. In the present study, the effectiveness of Al₇Cu₂Fe particles on suppression of hydrogen embrittlement in Al–Zn–Mg–Cu alloys was evaluated using X-ray microtomography. Quasi-cleavage cracks were found to be initiated in regions where local volume fractions of the Al₇Cu₂Fe particles were relatively low. Hydrogen partitioning to the MgZn₂ precipitate interface was suppressed, even in high hydrogen concentration material, by adding Al₇Cu₂Fe particles. However, the fractional area of the quasi-cleavage fracture in the material with high hydrogen concentration was higher due to insufficient hydrogen diffusion inside the Al₇Cu₂Fe particles and at the interface between the aluminum matrix and the particles. It appears that finely distributed small Al₇Cu₂Fe particles might effectively suppress hydrogen embrittlement.</p>

Suppression of Hydrogen Embrittlement due to Local Partitioning of Hydrogen to Dispersed Intermetallic Compound Particles in Al–Zn–Mg–Cu Alloys

Search this article

Description

Journal

Citations (4)*help

References(44)*help

Related Projects

Keywords

Details 詳細情報について

Export

Report a problem