About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Equipment, Instrumentation and In-Situ Process Monitoring
|
| Presentation Title |
Ultrasonic measurements for in situ material characterization in hybrid additive manufacturing |
| Author(s) |
Luz Sotelo, Rakeshkumar Karunakaran, Michael P. Sealy, Joseph A. Turner |
| On-Site Speaker (Planned) |
Luz Sotelo |
| Abstract Scope |
Hybrid additive manufacturing (AM) of metals involves the coupling of secondary processes or energy sources either cyclically or at the same time as the additive process. These hybrid approaches enable improved control over local material properties and global performance. Nonetheless, the resulting multiscale material heterogeneity presents nontrivial characterization challenges beyond defect detection, including knowledge of microstructure and residual stress. In this context, ultrasonic nondestructive evaluation (NDE) approaches offer the ability to directly interrogate microstructure and elasticity changes via elastic wave-material interactions. This talk presents the design and demonstration of the first ultrasonic in situ monitoring system for hybrid AM, specifically directed energy deposition (DED) with subtractive capabilities. In situ monitoring experiments with Ti6Al4V showed the evolution of material properties with the additive and subtractive steps in agreement with ex-situ measurements. Thus, in situ material property interrogation is demonstrated for hybrid AM, while advantages and limitations are discussed. |