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About this Abstract
Meeting 2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
Symposium 2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
Presentation Title A Test Artifact for Rapid Evaluation of Material Ductility Variation in Laser Powder Bed Fusion
Author(s) Dinh Son Nguyen, Shane Garner, Albert To
On-Site Speaker (Planned) Albert To
Abstract Scope This work proposes a test artifact design to evaluate the ductility variation of laser powder bed fusion (LPBF) processed materials by measuring the length of cracking specifically designed to occur along a plane in the artifact in the presence of residual stress. It is found that the crack lengths measured in test artifacts printed in Inconel 718 using different process parameters have a decaying exponential relationship with elongations measured in tensile testing of notched tensile specimens, having an R-squared value of 0.9238 in the regression. This strong correlation indicates that an increase in crack length in a test artifact indicates smaller notch ductility in the printed material. It is also found that the test artifacts printed using dry powders consistently have shorter cracks and hence higher ductility than those printed using powders with 70% humidity for a wide range of process parameters, which is consistent with previous findings.
Proceedings Inclusion? Planned: Post-meeting proceedings

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Understanding the Feasibility of Using NiTi55 Interlayer for Ti6Al4V-18Ni Maraging Steel Multi-Metal Deposition in L-PBF
Use of In-Situ Thermography to Study Scan Strategy for Laser Foil Printing of Metallic Glass
Using Acoustic Signals For Torch-to-Bead Distance Estimation and Closed-Loop Control in Wire Arc Additive Manufacturing
Using Coaxial Melt Pool Images to Construct In-Process 3D Volume Model in Powder Bed Fusion Additive Manufacturing
Using Machine Learning-Based Process Map to Guide Evaluation of Inconel 625 Mechanical Properties in Laser Foil Printing
Vat Photopolymerization of Ultra-Soft Polymer Foams
Vision-Based Calibration of Robotic 3D Printers for Cooperative 3D Printing
Volumetric Medical Models: Direct Imaging to Functional 3D Prints
Wire Arc Additive Manufacturing Benefits and Challenges: A Survey
Wire Arc Additive Manufacturing Development for Aluminum 6061 RAM
Wire Arc Additive Manufacturing of a Large Scale, High Aspect Ratio, Multi-Material Part
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