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)
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Presentation Title |
Detecting Residual Powder in Additively Manufactured Parts via Impedance Measurements |
Author(s) |
Nathan Raeker-Jordan, Sourabh Sangle, Pablo Tarazga, Mohammad Albakri, Christopher B. Williams |
On-Site Speaker (Planned) |
Nathan Raeker-Jordan |
Abstract Scope |
Powder bed fusion (PBF) additive manufacturing (AM) processes allow for the creation of complex, end-use parts from high-performance polymers and metals. However, complex geometries can have internal features that are challenging to depowder, resulting in residual powder trapped within the completed part. While there are various methods of powder removal or depowdering (e.g., mechanical manipulation, vibration/ultrasonic excitation, or washing), there are no formal processes for verifying depowdering completeness in the literature. In this work, a novel means of detecting the presence of residual powder in metal and polymer PBF AM parts is presented. This method leverages electromechanical impedance (EMI) -based measurement techniques, whereby loose powder within or on the surface or a part changes its resonant behavior and the resulting characteristic EMI response. The precision of this method is evaluated on geometries fabricated by both polymer and metal PBF, allowing for detection of as little as 0.8% powder by mass. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |