| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Aluminum Alloys: Development and Manufacturing
|
| Presentation Title |
Effect of Weld Microstructure on Solidification Cracking during Laser Welding of Extruded Al-Mg-Si Alloys |
| Author(s) |
Jaeheon Lee, Junmyoung Jang, Yeongcheol Shin, Yongjoon Kang, Mungu Kang, Taeseong Lim, Seung Hwan Lee |
| On-Site Speaker (Planned) |
Jaeheon Lee |
| Abstract Scope |
This study investigates the effect of weld microstructure on solidification cracking during laser welding of extruded Al-Mg-Si alloys. Solidification cracking is closely associated with the weld microstructure, which varies with the texture of the base metal and heat input conditions. To examine this, two independent variables were considered in the overlap welding of extruded Al-Mg-Si alloys: texture changes of extruded alloys via surface machining and heat input variations using a dual-beam laser. Laser welding experiments were conducted according to each independent variable condition, and the number of solidification cracks was measured from the cross-sections of the weld specimens. Then, EBSD analysis was performed on the cross-sections of the weld specimens to compare microstructural textures, such as the grain size, morphology, and grain orientation. Based on the results of the EBSD analysis, the correlation between the microstructural changes and solidification cracking susceptibility according to the two independent variable conditions was examined. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Characterization, Solidification |