| About this Abstract |
| Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Symposium
|
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Presentation Title |
Distortion and Residual Stress Mitigation of Large Parts for Wire-arc Additive Manufacturing |
| Author(s) |
Wen Dong, Xavier A. Jimenez, Carter D. Gassler, Albert C. To |
| On-Site Speaker (Planned) |
Wen Dong |
| Abstract Scope |
Wire arc additive manufacturing (WAAM) has drawn increasing attention due to its ability to print large metal parts. However, thermal gradients during the process can result in significant residual stress and distortion, negatively affecting product quality and making post-processing more difficult. In the present work, we have implemented several strategies when printing a part ~900 mm long to mitigate these issues. Firstly, a fixture designed based on topology optimization is attached to the baseplate to reduce distortion. However, cracks were observed in the baseplate near the deposit ends after the first trial. Then, we carefully examined and modified the deposit and baseplate shapes to further reduce the residual stress. The second trial successfully printed a part that met the required specifications. Due to its high accuracy and low cost, the modified inherent strain (MIS) method is employed to predict the distortion and residual stress for fixture design and shape modification. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |