| About this Abstract |
| Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
| Symposium
|
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
| Presentation Title |
An Acoustic-based Witness Coupon Methodology |
| Author(s) |
Conor Porter, Jian Cao |
| On-Site Speaker (Planned) |
Conor Porter |
| Abstract Scope |
Post-build validation of part quality is a key step for the certification of parts produced by additive manufacturing. Current validation methods, such as X-ray CT scanning and destructive witness coupon testing, can provide high-resolution and detailed data, but are expensive and time consuming to implement. This work presents a novel acoustics-based witness coupon methodology for time- and cost-effective validation of Laser Powder Bed Fusion (LPBF) part quality. This methodology centers on thin witness coupons built in parallel to the target parts. These witness coupons can be ‘plucked’ and the resulting resonant frequency measured and correlated with the geometric accuracy and overall density of the target part. This work presents an initial design and characterization of these acoustic-based witness coupons using both experimental results and simulations. Results indicate that the correlations to target part density and geometric accuracy can be used to verify target part quality based on acoustic-based witness coupons. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |