About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Aluminum Alloys, Characterization and Processing
|
Presentation Title |
The Effect of Octagonal Ingot Shape on AA6xxx Hot Rolling Performance |
Author(s) |
Joshua G. Lawalin, Pascal Gauthier, Tao Wang |
On-Site Speaker (Planned) |
Joshua G. Lawalin |
Abstract Scope |
Edge cracking during hot rolling of high-magnesium 5000-series aluminum ingot presents a challenge to rolling mills, resulting in costly rework, scrap loss, and downtime. This study was performed to identify key process and metallurgical factors that result in edge cracking in DC-cast AA5182 ingots during hot deformation. Microstructural investigation was conducted with optical microscope, SEM-EDS, and XRD to understand the impact of as-cast microstructure, ingot composition, and preheating time on edge crack initiation, propagation, and overall edge crack severity. Sodium is known to be a principal contributing factor to edge cracking, while magnesium and titanium content, within typical limits, does not have a noticeable effect. The inverse segregation zone and meniscus bands are found to serve as potential sites for edge crack initiation and propagation and must be minimized with appropriate casting practices. Ingot preheating practices were found to contribute to incipient melting which is detrimental to edge cracking performance. |
Proceedings Inclusion? |
Planned: Light Metals |
Keywords |
Aluminum, Process Technology, |