| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Steels in Extreme Environments
|
| Presentation Title |
Mechanisms of Pore Collapse in Additively Manufactured 316L Stainless Steel Under High Strain Rates |
| Author(s) |
Taylor Sloop, Elias Winterscheidt, Ella Parker, Kevin Lamb, Josh Kacher, Naresh Thadhani |
| On-Site Speaker (Planned) |
Taylor Sloop |
| Abstract Scope |
AM fabricated stainless steel samples with controlled pore sizes and distributions are compared to determine the mechanisms of pore collapse and the effects of porosity on shock wave propagation and spall. Velocity profiles were obtained using photon doppler velocimetry (PDV), and samples were soft-recovered and analyzed using computerized tomography (CT) to investigate void nucleation and coalescence in relation to pore locations. It is observed that the location and size of the pores affects shock wave propagation, up to and including spall mitigation. Additionally, the location and size of the pores affects the method of pore collapse as well as the damage mechanism present near the pre-existing pores. 500 µm pores experience powder consolidation, while 350 µm pores only partially solidify. Additionally, solidification only occurs for pores placed in the center of the sample in the impact direction. The combined effects of these collapse methods on spall mitigation are also investigated. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Characterization |