About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Symposium
|
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Presentation Title |
A Method for Improving the Build Time During Wire Arc Based Directed Energy Deposition of Low Carbon Steel |
Author(s) |
Ritam Sarma, Sajan Kapil |
On-Site Speaker (Planned) |
Ritam Sarma |
Abstract Scope |
Trochoidal Trajectory (TR) toolpaths are capable of achieving a 6 mm layer thickness with comparable heat input during Wire arc based Directed Energy Deposition. However, the larger melt pool associated with TR toolpaths leads to increase in heat accumulation in the deposited layer, resulting longer interlayer cooling times and affects overall build time. Therefore, in this work, a method for accelerating the build time of TR-based toolpaths has been explored. The TR-based toolpath deposited layer undergoes active cooling immediately post-deposition. The impact of active cooling on the microstructure of the deposited walls was analyzed, with EBSD results revealing similar grain size distributions in both deposited components. This finding was corroborated by mechanical property assessments. Walls deposited with active cooling exhibited a 2% lower ultimate tensile stress compared to those deposited with conventional cooling. A maximum of around 98% reduction in built time is achieved with the proposed methodology. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |