| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Additive Manufacturing: Equipment, Instrumentation and Measurement
|
| Presentation Title |
Real Time Monitoring of Electron Emissions during Electron Beam Powder Bed Fusion and Process Control for Arbitrary Geometries and Toolpaths |
| Author(s) |
Tim Horn, Chris Rock |
| On-Site Speaker (Planned) |
Tim Horn |
| Abstract Scope |
Real-time monitoring of electron emissions during electron beam powder bed fusion provides a wealth of in-process data across multiple length scales. We present a methodology for collecting both real time beam positional data and electron emissions as a function of time for arbitrary component geometries and complex tool-paths. We demonstrate visualization spatio-temporal process data and mathematical correlation to known defects observed in the electron signal. Ultimately, we eliminate the need for computationally expensive electron images in favor of structurally terse time-domain data leading to a plausible, practical and economically viable approach to real-time defect control in the AM of metal alloys. The value proposition of this approach hinges upon both the interpretation of the massive quantity of data generated per component, as well as the ability to correlate anomalous features smaller than the beam to incipient defect formation and preventative control actions in real-time. |