| About this Abstract |
| Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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| Symposium
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2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
| Presentation Title |
Effect of Laser Scanning Speed and Power on the Underlying Microstructure of SS316L Manufactured Using Laser Powder Bed Fusion |
| Author(s) |
Saneej Nihadh Samad, Patrick Merighe, Nadia Kouraytem |
| On-Site Speaker (Planned) |
Saneej Nihadh Samad |
| Abstract Scope |
Key process parameters in laser powder bed fusion (LPBF) play a crucial role in defining the metal’s meltpool and underlying microstructures. To support the transition from conventional manufacturing to LPBF, there is an innate need to understand the process-structure relationships in metals. In this research, the effect of laser scan speed and power on the meltpool morphology and the underlying microstructures of SS316L is evaluated. A constant volumetric energy density (VED) of 100 J/mm3 with constant hatch spacing and variable power and scan speeds is used to fabricate characterization coupons. The macro- and microstructure of SS316L is evaluated using optical microscopy (OM) for meltpool geometry and electron backscatter diffraction (EBSD) for grain analysis. Key microstructural fingerprints such as ASTM grain size, aspect ratio, grain orientation, and defects were revealed then compared to wrought SS316L. A constant correlation between VED and microstructure characteristics (e.g., grain size and aspect ratio) was observed. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |