The experimental results of laser welding of dissimilar alloys between Mg-Li and Ti alloy with different LSOs show that the IMC around the interface of LZ91 and TC4 improves the bonding strength of the BMs. When the LSO is -0.2mm, Mg17Al12 in the weld is evenly distributed in the α-Mg and β-Li solid solutions. At this time, the average microhardness and the tensile strength of the weld joint provided acceptable performance, 73.05HV and 124.06MPa, respectively.
D-shaped fiber is widely used in optical fiber sensing due to its special structure and excellent performance. Traditional manufacturing methods for D-shaped fiber are mechanical polishing and chemical etching. These methods have some disadvantages, such as low processing efficiency, and introduction of sub-surface damage layers or impurities. Laser ablation technology, as a non-contact high-efficiency technology, has been applied in optical fiber processing. The CO2 laser was chosen as the heat source due to the strong absorptivity of glass for a laser with a wavelength of 9-11 μm. In this paper, we reported a new method of D-shaped fiber manufacturing based on CO2 laser and study the effect of processing parameters on the surface morphology.
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