| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
Residual Stress and Distortion Modeling of a LENS Ti-6Al-4V Thin Wall Using the Evolving Microstructural Model of Inelasticity |
| Author(s) |
Matthew J. Dantin, Matthew W Priddy |
| On-Site Speaker (Planned) |
Matthew J. Dantin |
| Abstract Scope |
Predictive capabilities within additive manufacturing (AM) research have been a limiting factor for quality control and part qualification; however, AM modeling can reduce the time required for process optimization compared to traditional trial-and-error methods. This work focuses on the implementation of the Evolving Microstructural Model of Inelasticity (EMMI) into the Abaqus/Standard framework to examine the thermally induced residual stresses and distortion incurred from the Laser Engineered Net Shaping (LENS) of a Ti-6Al-4V thin wall. A 3D finite element thermal model calibrated using dual-wave pyrometer images was used to generate the temperature history of the thin wall build. The EMMI material constants were fitted based on tension, compression, and torsion tests. The results of the mechanical model are compared with experimental results found in literature along with results using the Bammann-Chiesa-Johnson mechanical model and an elastic-plastic mechanical model. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |