A comparative study of laser beam welding and laser–MIG hybrid welding of Ti–Al–Zr–Fe titanium alloy

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• 作者：Ruifeng Li ; Zhuguo Li ; Yanyan Zhu ; Lei Rong
• 关键词：Ti&#x2013 ; Al&#x2013 ; Zr&#x2013 ; Fe titanium alloy ; Laser beam welding ; Laser&#x2013 ; MIG hybrid welding ; Joint properties
• 刊名：Materials Science and Engineering: A
• 出版年：2011
• 出版时间：25 January 2011
• 年：2011
• 卷：528
• 期：3
• 页码：1138-1142
• 全文大小：936 K

文摘

Ti–Al–Zr–Fe titanium alloy sheets with thickness of 4 mm were welded using laser beam welding (LBW) and laser-MIG hybrid welding (LAMIG) methods. To investigate the influence of the methods difference on the joint properties, optical microscope observation, microhardness measurement and mechanical tests were conducted. Experimental results show that the sheets can be welded at a high speed of 1.8 m/min and power of 8 kW, with no defects such as, surface oxidation, porosity, cracks and lack of penetration in the welding seam. In addition, all tensile test specimens fractured at the parent metal. Compared with the LBW, the LAMIG welding method can produce joints with higher ductility, due to the improvement of seam formation and lower microhardness by employing a low strength TA-10 welding wire. It can be concluded that LAMIG is much more feasible for welding the Ti–Al–Zr–Fe titanium alloy sheets.