| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Process-induced Microstructures and Defects
|
| Presentation Title |
Analysis of Porosity Defects and Their Impact on Tensile Behavior in LPBF Stainless Steel 316L Utilizing X-ray Computed Tomography |
| Author(s) |
Tasrif Ul Anwar, Patrick Merighe, Rahul Reddy Kancharla, Boopathy Kombaiah, Nadia Kouraytem |
| On-Site Speaker (Planned) |
Nadia Kouraytem |
| Abstract Scope |
Laser powder bed fusion (LPBF) is gaining popularity due to the fast printing of consolidated parts with small features. However, the variability of the key process parameters in LPBF directly impacts the underlying structures, causing variations in mechanical properties. Thus, it is critical to understand the process-structure-property relationships in printed components. In this study, stainless steel 316L (SS316L) test coupons were manufactured using LPBF with varying laser parameters to evaluate the process-structure relationship. X-ray computed tomography (XCT) was employed to uncover the sample’s porosity content and spatial distribution. Based on XCT data, the defects were categorized as lack of fusion (LOF), sintering (an extreme case of LOF), nearly dense, and keyhole. These discoveries enable the printing of near-dense samples, thereby improving their mechanical properties in comparison to their defective counterparts. This study’s findings will help the adoption of LPBF SS316L components in various industries, particularly in the energy sector. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Iron and Steel |