About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing Modeling, Simulation, and Machine Learning: Microstructure, Mechanics, and Process
|
| Presentation Title |
Investigating Mechanical Anisotropy in Additively Manufactured 316L Stainless Steel |
| Author(s) |
Som Dixit, Pauline M. Smith, Shunyu Liu |
| On-Site Speaker (Planned) |
Shunyu Liu |
| Abstract Scope |
316L stainless steel fabricated via laser powder bed fusion exhibits significant mechanical anisotropy regarding strength and ductility. This study demonstrates that anisotropy is primarily influenced by build orientations (BOs) and scan rotation angles (SRAs). The key governing mechanisms were investigated experimentally, revealing that variations in dislocation density play a dominant role, while crystallographic texture differences further contribute to anisotropy. A novel dislocation density-based crystal plasticity finite element method (CPFEM) was developed to better understand mechanical anisotropy. Using experimentally calculated dislocation density and microstructural data, synthetic representative volume elements were generated and employed in mechanical simulations using the open-source DAMASK software. The simulated stress-strain curves closely matched the experimental results across all conditions. This demonstrates that the developed model effectively captures the influence of dislocation density variations and microstructural characteristics on mechanical anisotropy induced by different BOs and SRAs. |