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Robotic Nd:YAG Fiber Laser Welding of Ti-6Al-4V Alloy

机译：Ti-6Al-4V合金机器人Nd：YAG光纤激光焊接

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摘要

In the present study, Ti6Al4V titanium alloy plates were joined using a robotic fiber laser welding method. The laser welding process was carried out at two different welding speeds. Effects of different heat input conditions on the microstructure and mechanical properties of robotic fiber laser welded joints were investigated. Some grain coarsening was observed in the microstructure of weld metal in samples joined using high heat input, compared to those using low heat input, and volume rates of primary α structures increased in the weld metal. The microstructure of weld metal in samples joined using low heat input was made of basket-weave or acicular α' grains and primary β grains in grain boundaries. Tensile and yield strength of samples joined using low heat input were higher than for those joined using high heat input, but their ductility was lower.
机译：在本研究中，使用机器人光纤激光焊接方法连接了Ti6Al4V钛合金板。激光焊接过程以两种不同的焊接速度进行。研究了不同热输入条件对机器人光纤激光焊接接头组织和力学性能的影响。与使用低热输入的样品相比，在使用高热输入的样品中，焊接金属的显微组织中观察到一些晶粒粗化，并且在焊接金属中，初级α结构的体积率增加。使用低热量输入连接的样品中的焊接金属的显微组织由晶格组织或针状α'晶粒和晶界中的初生β晶粒组成。低热量输入连接的样品的拉伸强度和屈服强度高于高热量输入连接的样品，但延展性较低。

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