Hybrid laser–TIG welding, laser beam welding and gas tungsten arc welding of AZ31B magnesium alloy

2004 ◽  
Vol 381 (1-2) ◽  
pp. 129-133 ◽  
Author(s):  
Liu Liming ◽  
Wang Jifeng ◽  
Song Gang
Keyword(s):  
Magnesium Alloy ◽  
Laser Beam ◽  
Arc Welding ◽  
Laser Beam Welding ◽  
Gas Tungsten Arc Welding ◽  
Tig Welding ◽  
Az31b Magnesium Alloy ◽  
Gas Tungsten Arc ◽  
Gas Tungsten

Studies on Microstructure and Mechanical Properties of GTAW, Laser and Friction Stir Welded ZM21 Magnesium Alloy

2015 ◽  
Vol 787 ◽  
pp. 475-479
Author(s):  
K.L. Hari Krishna ◽  
S.R. Koteswara Rao ◽  
V.V. Subba Rao
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Laser Beam ◽  
Tensile Properties ◽  
Laser Beam Welding ◽  
Friction Stir ◽  
Gas Tungsten Arc ◽  
Microstructure And Mechanical Properties ◽  
Gas Tungsten ◽  
Zm21 Magnesium Alloy

Present work pertains to welding of ZM21 magnesium alloy using three different welding techniques namely Gas Tungsten Arc Welding, Laser Beam Welding and Friction Stir Welding. After careful trial and error method, the process parameters were identified to produce defect free, full penetration welds successfully. The microstructure and mechanical properties of ZM21 magnesium alloy using GTAW, LBW and FSW processes were analyzed by optical microscopy, tensile testing and Vickers micro hardness measurements. The results show that the tensile properties of Friction stir welds and Laser beam welds are much better than those of gas tungsten arc welds. The formation of very fine grains in the friction stir welded region and absence of HAZ in LBW are found to be main reasons for better tensile properties. It has been concluded that the ZM21 magnesium alloy exhibits good weldability in all the three welding processes and laser beam welding process offers higher joint efficiency when compared with GTAW and FSW.

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