Toward determining melt pool quality metrics via coaxial monitoring in laser powder bed fusion. (January 2018)

• Record Type: Journal Article
• Authors: Fisher, Brian A.; Lane, Brandon; Yeung, Ho; Beuth, Jack
• Is Part Of: Manufacturing letters. Volume 15:Part B(2018)
• Page Start: 119
• Page End: 121
• Publication Date: 2018-01
• Subjects: Additive manufacturing -- Melt pool monitoring -- Coaxial monitoring -- Laser powder bed fusion -- NIST Additive Manufacturing Metrology Testbed (AMMT); Manufacturing industries -- Periodicals; Production engineering -- Periodicals; Manufacturing industries; Periodicals; 670
• DOI: 10.1016/j.mfglet.2018.02.009
• Languages: English
• ISSNs: 2213-8463

Abstract

Highlights: Beam power, beam velocity, and part temperature affect melt pool thermal emission. Melt pool thermal emission correlates strongly to melt pool cross sectional area. Simple sensors can be used to gain powerful insight in laser powder bed fusion. Abstract: The current industry trend in metal additive manufacturing is towards greater real time process monitoring capabilities during builds to ensure high quality parts. While the hardware implementations that allow for real time monitoring of the melt pool have advanced significantly, the knowledge required to correlate the generated data to useful metrics of interest are still lacking. This research presents promising results that aim to bridge this knowledge gap by determining a novel means to correlate easily obtainable sensor data (thermal emission) to key melt pool size metrics (e.g., melt pool cross sectional area).