Abstract
Though the development of laser additive manufacturing has achieved great success and has been widely used for various materials, it still has limited applications for materials with high melting temperature. In this report, we explore the feasibility of using femtosecond lasers to melt and resolidify these materials, as femtosecond lasers can generate MW-level peak power and create high local temperature. Tungsten, which has the highest melting point (3,422 \(^{\circ }\hbox {C}\)) among all the elements, and several other materials with melting temperature higher than 3,000 \(^{\circ }\hbox {C}\) are chosen for the proof of concept. For the first time, femtosecond laser melting and resolidification of these high-temperature powder materials is achieved. Fabricated samples are characterized by scanning electron microscope and energy-dispersive X-ray spectroscopy. The results manifest that femtosecond laser melting can be an ideal solution for laser additive manufacturing of high-temperature materials.
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Nie, B., Huang, H., Bai, S. et al. Femtosecond laser melting and resolidifying of high-temperature powder materials. Appl. Phys. A 118, 37–41 (2015). https://doi.org/10.1007/s00339-014-8897-y
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DOI: https://doi.org/10.1007/s00339-014-8897-y