![]() ![]() ![]() This work appeared on the cover of the journal on September 17, 2021.Īccording to LLNL researchers, alternative shapes such as Bessel beams are a major concern in LBPF technology, with large temperature gradients and complex molten pool instability occurring where the laser comes into contact with metal powder. This is an LPBF porosity-inducing phenomenon that is exacerbated by the use of Gaussian beams. They found that applying these types of beams reduced the likelihood of pore formation and “keyholes”. ![]() It has many unique properties such as self-healing and non-diffraction. In a treatise published by Science Advances, Researchers have experimented with an exotic light beam shape known as a Bessel beam (reminiscent of a bullseye pattern). Researchers at Lawrence Livermore National Laboratory (LLNL) have addressed this issue by investigating alternative shapes for Gaussian beams commonly used in high-power laser printing processes such as laser powder bed melting (LPBF). ![]()
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