NIST Achieving Better Laser Powder Bed Fusion 3D Printing Melt Pool

- Sep 27, 2018-

Laser powder bed fusion (LPBF) 3D printing uses a focused, high-power laser to selectively melt geometric patterns into metallic powders to build an almost completely dense, free object.The mass of the process and results section is affected by many process parameters, and the position, power and speed of the laser need to be well controlled according to the characteristics of the powder layer to achieve full fusion of adjacent layers and scanning track.

LPBF defects can occur when these laser parameters are combined incorrectly, and there has been research published on hypotheses such as using a laser beam to enhance performance and using the right heat source.However, better control of power spectrum or density on the scanning path can reduce the possibility of defect formation.

A team of researchers from the National Institute of Standards and Technology (NIST), which built an open architecture Additive Manufacturing Metrology Testbed (AMMT) for studying advanced process monitoring and control strategies, recently published a paper, titled "Implementation of Advanced Laser Control Strategies for Powder Bed Fusion Systems," on their efforts to implement laser control on the AMMT in order to negate the formation of defects and achieve better melt pool control.

3D Printing Melt Pool

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