| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Laser Manufacturing of High-Performance Materials
|
| Presentation Title |
Blue Laser Welding of Copper Foil |
| Author(s) |
Jonah Evan Duch, Jeffrey Rodelas, Peter Kinney, Jack Herrmann |
| On-Site Speaker (Planned) |
Jonah Evan Duch |
| Abstract Scope |
Laser welding of copper, found in high reliability electronic applications, is difficult as absorbance in the infrared (IR) wavelength is approximately 2 and 5% respectively. Additionally, welding of sheet metal is difficult as small fluctuations can lead to blow throughs or lack of penetration defects. New blue laser welding power supplies finally offer a stable, high quality laser source to enable welding of sheet metal. This blue laser light allows for welding of IR reflective metals such as copper, which increases absorbance to 70%.
To characterize blue laser welding, numerous welds were made on copper samples. Various parameter spaces were explored: pulse welds and continuous welds, welds under argon and air, and foil fixture development. Temperature measurements were taken to characterize the heat distribution. Microstructural features were characterized using µ-CT and SEM. From these results came a greater understanding of copper foil welding using blue light, and eventual weld qualification. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Joining, Copper / Nickel / Cobalt, Solidification |