| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Length-Scale Phenomena in Mechanical Response
|
| Presentation Title |
Crystal Plasticity Study on Porosity and Anisotropic Fracture Behavior of Additively-manufactured 316L Stainless Steel |
| Author(s) |
Ziyi Ding, Jun Song |
| On-Site Speaker (Planned) |
Ziyi Ding |
| Abstract Scope |
Heterogenous microstructure holding flaws affects heavily the large deformation response of stainless steel 316L fabricated by laser-based powder bed fusion(LPBF). Existing experimental studies have identified damage of void to the component, however, lacking quantifying value effect of pores to fracture. In this study, we have investigated the effects of keyhole pores and loading direction on the anisotropic tension behaviors of the as-built part through the crystal plasticity finite element model(CPFE), while a specific ductile mechanical threshold stress plasticity model (D-MTS) has been developed. Columnar-shaped grain with <001> texture orientation is particularly controlled. Based on more than hundreds of CPFE simulations having random pores with a series of relative densities, ranging from 95% to 99.9%, and different loading angles, results statistically demonstrate that there exist threshold porosity-fracture-values below which pores cause significant premature failure. The present study offers an optimal decision guide when applying the post-processing method to eliminate voids. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Modeling and Simulation |