About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
|
Additive Manufacturing: Equipment, Instrumentation and In-Situ Process Monitoring
|
Presentation Title |
Several Ways Ultrasound Can Be Used during Powder Bed Fusion |
Author(s) |
Christopher Kube, Nathan Kizer, Corey Dickman, Edward Reutzel |
On-Site Speaker (Planned) |
Christopher Kube |
Abstract Scope |
Ultrasonic or elastic waves in the MHz range are capable of propagating deep into metallic parts where they can interact and scatter from heterogeneities. Scattering from heterogeneities leads to sensitivity to defects, microstructure, and has even been used to monitor melt pool boundaries, dynamics, and solidification. Alternatively, ultrasound can be applied as a processing step to alter the microstructure.
<br><br>
This presentation describes research toward transitioning these capabilities into the powder bed fusion process. This is achieved by integrating an array of ultrasonic transducers into an EOS M280 build substrate. 9Cr-1Mo parts with a range of process parameters are manufactured directly above each transducer allowing for the assessment of the aforementioned capabilities. Particularly exciting is the possible simultaneous in situ monitoring and influence on microstructure formation, which could enable potential on the fly corrections along with understanding the mechanisms of how ultrasonic treatments could tailor AM microstructure. |