Lawrence Livermore National Security, LLC

Sonny S Ly

Alexander M Rubenchik

Manyalibo Joseph Matthews

Gabriel Mark Guss

Jeffrey Devin Bude

Saad A Khairallah

Gabe Guss

Wayne E King

Raluca A Negres

Nan Shen

Wesley John Keller

The present disclosure relates to a laser system for processing a material. The system may make use of a laser configured to intermittently generate a first laser pulse of a first duration and a first average power, at a spot on a surface of the material being processed, and a second laser pulse having a second duration and a second peak power. The second duration may be shorter than the first duration by a factor of at least 100, and directed at the spot. The second laser pulse is generated after the first laser pulse is generated. The first laser pulse is used to heat the spot on the surface of the material, while the second laser pulse induces a melt motion and material ejection of molten material from the melt pool.

Laser drilling and machining enhancement using gated CW and short pulsed lasers

An intelligent feed forward model to control additive manufacturing (AM) laser powder bed fusion process and reduce spattering whereby defects are eliminated by controlling the laser power and reducing spattering through a computer model. This application describes using a proportional integral derivative (PID) controller to create a power map that reduces spattering.

Controlling AM spatter and conduction

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Mountain House, CA, United States of America

Sonny S Ly