Ensuring flawless metal 3D printing: New research tackles high-fidelity, high-resolution process monitoring

https://www.eurekalert.org/news-releases/1062802

"for laser powder bed fusion additive manufacturing, using microphones, photodiodes, machine learning,.. >90% accuracy with 0.1 ms temporal resolution in detecting keyhole pores (vapor depression formed in melt pool during printing)... intelligent, closed-loop control, faster qualification/ certification for metal additive manufacturing parts...  simple light/ sound sensors monitor printing, high-speed synchrotron x-ray imaging trains machine learning model to recognize conditions that lead to pore formation"