About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Aluminum Alloys: Development and Manufacturing
|
| Presentation Title |
Role of Cu addition in corrosion properties of Al7SiMgFeMn-based thin-wall high-pressure die castings |
| Author(s) |
Fei Xue, Yang Huo, Danyil Kovalov, Niamh Hosking, Joy Forsmark, Mei Li |
| On-Site Speaker (Planned) |
Fei Xue |
| Abstract Scope |
Aluminum-based alloys have been increasingly used in automobile industry for their low-cost and high specific strength. With high-pressure die casting (HPDC), manufacturing large-size, complicated shape and non-heat-treatable thin-wall Al component (<3mm) is an emerging technology for bill of process efficiency. As a part of effects to increase recycled materials consumption, this work investigated corrosion response to ASTM-G110 test in two as-cast Al7SiMgFeMn HPDC thin-wall plates with low (<0.02wt.%) and high (≥0.5wt.%) Cu additions. The surface examination showed that higher Cu addition promoted denser pitting corrosion than the low Cu-containing variant. Cross-sectional microstructural observation revealed that corrosion development was mainly through Al-Si eutectic network in the low-Cu plates. With higher Cu addition, some Al-dendrites were corroded as a secondary mechanism in addition to eutectic. Detailed microstructural characterization is underway and the influence of Cu additions on eutectic, dendrites and intermetallic compounds will be discussed to understand the corrosion behavior differences. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Environmental Effects, Characterization |