About this Abstract |
| Meeting |
11th Conference on Trends in Welding Research + Additive Manufacturing (TWR+AM)
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| Symposium
|
11th Conference on Trends in Welding Research + Additive Manufacturing (TWR+AM)
|
| Presentation Title |
Prediction of Thermally Affected Region in Keyhole Mode Laser Welding of Copper Through Sequentially-Coupled Molten Pool and Thermo-Mechanical Simulations |
| Author(s) |
Aryan Aryan, Andrea Orr, Elizabeth Hetrick, Wei Zhang |
| On-Site Speaker (Planned) |
Wei Zhang |
| Abstract Scope |
For copper joining, an intense laser heat source is needed to form a weld pool with sufficient penetration. Due to its high thermal conductivity, the heat can conduct far into the solid Cu workpiece. An accurate prediction of thermally affected region requires the knowledge of laser absorption which is affected by material properties and multiple reflections within keyhole. This study employs sequentially-coupled molten pool and thermo-mechanical simulations. Specifically, a fine-resolution molten pool model is used to predict the heat transfer and fluid flow of liquid metal and the keyhole dynamics. The laser absorptivity as a function of temperature and incident angle is implemented into a ray-tracing algorithm to calculate the net absorption. Such effective absorptivity is then used in a large-scale thermo-mechanical simulation where the heat sink from fixturing is considered. The simulations can help optimize laser parameters to reduce the extent of thermally affected region. |
| Proceedings Inclusion? |
Undecided |