|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||A-26: Characterization of Additive Manufactured Microstructures Using Ultrasonic Measurements
||Hualong Du, Paul Panetta, Lisa Deibler, Bradley Jared
|On-Site Speaker (Planned)
Additive manufactured materials can make a great impact on manufacturing, but the microstructures of these materials have complex grain morphology, residual stress and texture. We developed ultrasonic measurements to map the 3-D spatial distribution of grain morphology in stainless steel alloys manufactured through laser additive manufactured processes. Ultrasonic scattering from grain boundaries in various directions was used to characterize the microstructure Ultrasonic scattering is sensitive to the mean grain size and grain morphology. The 3-D spatial distribution of grain morphology was measured by comparing the RMS curves of ultrasonic scattered signals captured in various directions including the direct backscattered direction. We were identified spatial variations in the microstructure of the stainless steel sample. We also applied these scattering methods to determine the degree of porosity in additive manufactured aluminum alloys. These measurements could potentially be used for qualifying the material and the process as well as provide feedback during fabrication.
||Planned: Supplemental Proceedings volume