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Detailed understanding of the complex melt pool physics plays a vital role in predicting optimal processing regimes in laser powder bed fusion additive manufacturing. In this work, we use high framerate video recording of Selective Laser Melting (SLM) to provide useful insight on the laser-powder interaction and melt pool evolution of 316L powder layers, while also serving as a novel instrument to...
We use high speed multiwavelength thermal imaging to quantify cooling rates and temperature gradients generated by the laser — powder interaction during a metal powder bed fusion process to understand rapidly solidified material properties.
We present experimental results and modeling of melt pool dynamics and particle ejection associated with selective laser melting. High speed optical diagnostics are used to probe morphological changes for SS316L. Data is compared to simulations.
We present a method for direct calorimetric measurement of powder absorptivity using a thin laser illuminated disc. Powder porosity is measured independently and a scheme eliminating the effect of convective and radiative losses is implemented.
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