| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Large-Scale Metal Additive Manufacturing
|
| Presentation Title |
Process Development for Laser Hot Wire Additive Manufacturing of Ti-6Al-4V |
| Author(s) |
Elizabeth Chang-Davidson, Brandon Abranovic, Jack Lee Beuth |
| On-Site Speaker (Planned) |
Elizabeth Chang-Davidson |
| Abstract Scope |
This work focuses on process development for large-scale laser hot wire additive manufacturing. Initial work included mapping key melt pool dimensions from single bead geometries across process space, including melt pool width, length, depth, cross-sectional area, and length to width ratio. This mapping was applied to the development of stable parameter sets using semi-analytical welding models and finite element analysis. These simulation methods were then extended to develop cool down and start/stop strategies that enabled the fabrication of larger and more complex geometries such as thin walls and large disks. This development involved selecting interlayer dwell times for desired steady state temperatures and ramping down power and velocity to avoid humping and slumping. The final extension of the modelling involved the selection of laser scanning strategies and prediction of the associated residual stresses. |