About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Symposium
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2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Presentation Title |
Effect of Coincident Laser Exposure and Heat Treatment on Porosity and Tensile Behavior of SS316L Fabricated by Dual-Laser Powder Bed Fusion |
Author(s) |
Ishfaqur Rahman, Scott M. Thompson |
On-Site Speaker (Planned) |
Ishfaqur Rahman |
Abstract Scope |
The influence of coincident laser exposure and heat treatment on porosity characteristics and tensile performance of SS316L fabricated via laser powder bed fusion (L-PBF) was experimentally investigated. Tensile specimens were fabricated using a TRUMPF TruPrint 2000 system under single-laser and dual-laser exposure modes, with the laser overlap region intentionally located at the center of the gauge section. Selected samples were subjected to heat treatment prior to characterization. X-ray computed tomography (XCT) was used to generate three-dimensional porosity maps and quantify pore distributions. Tensile testing was performed to evaluate mechanical response. Results indicate that dual-laser exposure increases localized porosity within the overlap region compared to single-laser specimens. Heat treatment was observed to influence pore morphology and distribution. Tensile properties degraded in dual-laser samples, with premature failure initiating near regions of elevated pore concentration, while single-laser specimens exhibited more uniform failure behavior. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |