Hydrogen trapping and embrittlement in high-strength Al alloys.

ABSTRACT: Ever more stringent regulations on greenhouse gas emissions from transportation motivate efforts to revisit materials used for vehicles¹. High-strength aluminium alloys often used in aircrafts could help reduce the weight of automobiles, but are susceptible to environmental degradation^2,3. Hydrogen 'embrittlement' is often indicated as the main culprit⁴; however, the exact mechanisms underpinning failure are not precisely known: atomic-scale analysis of H inside an alloy remains a challenge, and this prevents deploying alloy design strategies to enhance the durability of the materials. Here we performed near-atomic-scale analysis of H trapped in second-phase particles and at grain boundaries in a high-strength 7xxx Al alloy. We used these observations to gu

SUBMITTER: Zhao H 

PROVIDER: S-EPMC8850197 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature