| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
An Atoms to Autos Approach for Materials Innovations for Lightweighting: An LMD Symposium in Honor of Anil K. Sachdev
|
| Presentation Title |
Investigating Hydrogen Embrittlement in Aluminum Alloys: Insights from First-principles Calculations |
| Author(s) |
XiaoXiang Yu, Ganesh Bhaskaran, Yudie Yuan |
| On-Site Speaker (Planned) |
XiaoXiang Yu |
| Abstract Scope |
Hydrogen embrittlement in aluminum alloys is a complex phenomenon influenced by the interplay of individual alloy elements and their interactions. In this study, we employ first-principles calculations to delve into the distribution of alloy elements near aluminum grain boundaries (GB), quantify the propensity for hydrogen accumulation at GB sites, and map the crack formation energy in relation to the alloy's elemental composition and hydrogen concentration.
Our findings reveal a significant increase in crack susceptibility when hydrogen coexists with GB elements. Notably, we observe that the presence of magnesium segregation at GBs mitigates the severity of hydrogen embrittlement induced by zinc and copper. These results underscore the intricate nature of hydrogen embrittlement and emphasize the criticality of understanding the interplay between alloy elements, hydrogen concentration, and grain boundary characteristics when assessing a material's susceptibility to environmentally assisted cracking. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Environmental Effects, Computational Materials Science & Engineering |