| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Melt Processing, Casting and Recycling
|
| Presentation Title |
Influence of Chemistry and Direct Chill (DC) Casting Parameters on the Formation of Altenpohl Zone in 5xxx Alloys |
| Author(s) |
Akash Pakanati, Snorre Rist, Thomas Hartmut Ludwig, Eystein Vada, Shiva Talatori, Jan-Erik Ødegård |
| On-Site Speaker (Planned) |
Thomas Hartmut Ludwig |
| Abstract Scope |
Anodization of 1xxx and 5xxx aluminium alloy sheets improve the corrosion resistance, in addition to providing a bright and shiny appearance. These properties find application in a variety of building exterior and decorative purposes. However, Altenpohl zones are a typical defect observed in some of the 1xxx and 5xxx series aluminium alloys depending on their Fe-to-Si ratio. This defect is a consequence of different iron bearing particles responding differently to etching during the anodizing process. Considerable research was conducted to study Altenpohl zone formation in 1xxx and 5xxx alloys. This paper aims to improve and extend the knowledge base where the influence of alloy chemistry and casting speed on the formation and extent of Altenpohl zones in a commercially available 5005 alloy has been studied. Based on the results, recommendations on chemistry and process parameters are provided to control Altenpohl zone formation during DC casting of rolling slabs |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Solidification, Characterization |