| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Advances in Materials and Systems for a Hydrogen Economy
|
| Presentation Title |
Insights into Hydrogen Embrittlement of AA7075 Aluminum Alloy Fabricated by Additive Friction Stir Deposition |
| Author(s) |
Ebenezer Acquah, Munsu Kim, Gregory Kubacki, Nilesh Kumar |
| On-Site Speaker (Planned) |
Nilesh Kumar |
| Abstract Scope |
In recent years, hydrogen has received increased attention as an alternative fossil fuel. The successful incorporation of hydrogen across many sectors will require, among many things, studying hydrogen’s interaction with materials. This research focuses on understanding the susceptibility to hydrogen embrittlement of an AA7075 alloy processed by a solid-state additive manufacturing technique referred to as additive friction stir deposition (AFSD). The hydrogen charging was conducted by subjecting dog-bone-shaped tensile test specimens to cathodic pre-charging in 3.5 wt.% NaCl solution at room temperature. It was followed by quasi-static tensile testing of the hydrogen-charged specimens (while hydrogen charging of the tensile specimens continued) at room temperature. The hydrogen embrittlement susceptibility of AFSD-AA7075 was compared to AA7075-T7 and correlated to the microstructure, hydrogen concentration, and its diffusivity. This study is expected to provide insight into the role of AFSD processing in hydrogen embrittlement mitigation. |