Welding parameters can greatly affect the final product. In this study, there was a variation given on the pulse energy, i.e., heat input parameters. The microstructure was analyzed and presented in relation to the efficiency of corrosion. The microstructural study showed the changes of the fusion zone (FZ) and the heat-affected zone (HAZ) with an increase in pulse energy. The development of a prominent austenite process on the weld material had a prolonged effect on its corrosion resistance property. Electrochemical impedance spectroscopy (EIS) and potentiodynamic measurements were used to test the electrochemical activity of laser-weld 2205 duplex stainless steel in an aqueous 3.5% NaCl solution. Finally, the findings of the EIS analysis were supported by Raman spectroscopy. Based on the obtained results, the 2205 duplex stainless steel (DSS) weld obtained at a higher pulse energy showed higher corrosion resistance than the welded sample obtained at a low pulse energy. The impedance spectroscopy confirmed a smooth surface property with an increase in the pulse energy and the presence of an oxide layer, a finding also confirmed by the Raman spectroscopy measurements.

中文翻译：

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通过调节脉冲 Nd:YAG 激光束焊接参数改善 2205 双相不锈钢的耐腐蚀性和显微组织表征

焊接参数可以极大地影响最终产品。在这项研究中，脉冲能量发生了变化，即热输入参数。对微观结构进行了分析，并提出了与腐蚀效率的关系。显微组织研究表明，随着脉冲能量的增加，熔合区（FZ）和热影响区（HAZ）发生了变化。焊接材料上显着的奥氏体过程的发展对其耐腐蚀性能有长期的影响。电化学阻抗谱 (EIS) 和动电位测量用于测试激光焊接 2205 双相不锈钢在 3.5% NaCl 水溶液中的电化学活性。最后，EIS 分析的结果得到了拉曼光谱的支持。根据得到的结果，在较高脉冲能量下获得的 2205 双相不锈钢 (DSS) 焊缝显示出比在低脉冲能量下获得的焊接样品更高的耐腐蚀性。随着脉冲能量的增加和氧化层的存在，阻抗光谱证实了光滑的表面特性，拉曼光谱测量也证实了这一发现。