Semi-supervised machine learning of optical in-situ monitoring data for anomaly detection in laser powder bed fusion

Semi-supervised machine learning of optical in-situ monitoring data for anomaly detection in laser powder bed fusion

Blog Article

Laser powder bed fusion (L-PBF) is one of the most widely used metal additive manufacturing read more technology for fabrication of functional and structural components.However, inconsistency in quality and reliability of L-PBF products is still a significant barrier preventing it from wider adoption.Machine learning (ML) of monitoring data offers a unique solution to effectively identify possible defects and predict the quality of L-PBF products.

In this work, we introduce a semi-supervised ML approach to detect anomalies that occurred in L-PBF products.We train the ML model to classify surface appearances in the reference monitoring data.We then correlate the classified appearances to post-process characteristics, e.

g.surface roughness, morphology, or tensile strength.We demonstrate that the established correlation enables the determination of key appearances indicative of the quality of the printed samples including anomaly-free, lack-of-fusion and overheated.

We further validate our berness white sneakers ML approach by performing prediction on test samples having various geometries.