A Parametric Study on Laser Welding of Magnesium Alloy AZ31 by a Fiber Laser

2015 ◽  
Vol 137 (4) ◽  
Author(s):  
Neil S. Bailey ◽  
Wenda Tan ◽  
Yung C. Shin
Keyword(s):  
Magnesium Alloy ◽  
Laser Welding ◽  
Fiber Laser ◽  
Welding Speed ◽  
Laser Power ◽  
Tensile Tests ◽  
Alloy Az31 ◽  
Magnesium Alloy Az31 ◽  
Weld Pool Geometry ◽  
Novel Processing

Laser welding of wrought magnesium alloy has been investigated through experimentation and simulation. Laser butt welds and laser lap welds were performed on 2.0 mm thick magnesium alloy AZ31 plates using a 1 kW fiber laser and shielded with argon gas. The effects of laser power and welding speed on weld geometry and microstructure were investigated. Tensile tests were performed to verify weld quality. Through experimentation, a novel processing map was created, which gives the ranges of operating parameters of laser power and welding speed that resulted in viable, defect-free welds. Numerical simulations were performed to predict the weld pool geometry and keyhole stability, and resultant microstructures are shown to be in good agreement with experimental results.

A Parametric Study on Laser Welding of Magnesium Alloy AZ31 by a Fiber Laser

2014 ◽  
Author(s):  
Neil S. Bailey ◽  
Wenda Tan ◽  
Yung C. Shin
Keyword(s):  
Magnesium Alloy ◽  
Laser Welding ◽  
Fiber Laser ◽  
Welding Speed ◽  
Laser Power ◽  
Alloy Az31 ◽  
Magnesium Alloy Az31 ◽  
Wrought Magnesium Alloy ◽  
Weld Pool Geometry ◽  
Good Agreement

Laser welding of wrought magnesium alloy has been investigated through experimentation and simulation. Laser butt welds and laser lap welds were performed on 2.0 mm thick magnesium alloy AZ31 plates using a 1 kW fiber laser and shielded with argon gas. The effects of laser power and welding speed on weld geometry and microstructure were investigated. Through experimentation, the ranges of operating parameters for laser power and welding speed which resulted in viable, defect-free welds were found and reported. Simulations were carried out to predict the weld pool geometry and resultant microstructure and are shown to be in good agreement with experimental results.

Fiber Laser Welding of Noncombustible Magnesium Alloy

2008 ◽  
Vol 580-582 ◽  
pp. 479-482 ◽  
Author(s):  
Yuji Sakai ◽  
Kazuhiro Nakata ◽  
Takuya Tsumura ◽  
Mitsuji Ueda ◽  
Tomoyuki Ueyama ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Magnesium Alloy ◽  
Laser Welding ◽  
Fiber Laser ◽  
Vickers Hardness ◽  
Laser Power ◽  
Welded Joint ◽  
Welding Process ◽  
Fiber Laser Welding ◽  
Laser Welding Process

Noncombustible magnesium alloy AMC602 (Mg-6mass%Al-2mass%Ca) extruded sheet of 2.0mm thickness was successfully welded using a fiber laser welding process at welding speed of 10m/min at 3kW laser power. Tensile strength of the welded joint was about 82 to 88% of that of the base metal. Vickers hardness, tensile strength and micro structural properties are also discussed.

Low Temperature Superplasticity of Fine-Grained Magnesium Alloy AZ31

2006 ◽  
Vol 15-17 ◽  
pp. 467-472 ◽  
Author(s):  
Jie Xing ◽  
Xu Yue Yang ◽  
Hiromi Miura ◽  
Taku Sakai
Keyword(s):  
Magnesium Alloy ◽  
Low Temperature ◽  
Stress Exponent ◽  
Tensile Axis ◽  
Tensile Tests ◽  
Total Elongation ◽  
Grain Rotation ◽  
Alloy Az31 ◽  
Fine Grained ◽  
Magnesium Alloy Az31

Low temperature superplasticity (LTSP) was studied in a fine-grained magnesium alloy AZ31 which was processed by multi-directional forging (MDF) under decreasing temperature conditions. Tensile specimens were cut from MDFed Mg alloy parallel to the final compression axis (CA), and the tensile axis perpendicular to the CA. Tensile tests was carried out at temperatures from 393K to 473K and at various strain rates. Superplasticity appears even at a low temperature of 393K with a stress exponent (n) of about 0.56 and a total elongation of 370%. The relative large stress exponent can be connected with grain coarsening taking place during deformation. The initial texture hardly takes place during deformation. This suggests that grain rotation does not occur during superplasticcity.

Feasibility Study of Low Power Fiber Laser Welding AA2024 and AA7075 Alloys T-Joint

2016 ◽  
Vol 701 ◽  
pp. 182-186 ◽  
Author(s):  
Shamini Janasekaran ◽  
Ai Wen Tan ◽  
Farazila Yusof ◽  
Mohd Hamdi Abdul Shukor
Keyword(s):  
Laser Welding ◽  
Low Power ◽  
Fiber Laser ◽  
Welding Speed ◽  
Laser Power ◽  
Shielding Gas ◽  
Power Laser ◽  
Fiber Laser Welding ◽  
Full Penetration ◽  
Dissimilar Aluminum Alloys

Dissimilar aluminum alloys, AA2024-0 and AA7075-T6 were laser welded on both sides in a T-joint configuration using a low power fiber laser. The effect of welding speed (9, 12, 15, 18 and 21 mm/s) on weldability was evaluated at laser power of 270W with argon gas as the shielding gas. The sample welding angle was fixed at 45° with an interval of 180 seconds between each welding pass. Macrograph observations revealed that full penetration with pore free weld of these dissimilar joint was obtained at the laser parameters of 270 W and 9 mm/s, suggesting that lower welding speed is preferred during low power laser welding.

Grain Refinement of Magnesium Alloy AZ31 by Repeated Cold Rolling and Annealing

2011 ◽  
Vol 686 ◽  
pp. 151-156
Author(s):  
Xing Pin Chen ◽  
Rui Xiao ◽  
Can Sun ◽  
Zhen Xia Lin ◽  
Qing Liu
Keyword(s):  
Magnesium Alloy ◽  
Cold Rolling ◽  
Grain Refinement ◽  
Tensile Tests ◽  
Alloy Az31 ◽  
Magnesium Alloy Az31 ◽  
Fracture Elongation ◽  
Az31 Sheet ◽  
Cold Rolling And Annealing ◽  
Equiaxed Grains

This work focused on the grain refinement and investigation its effect on the microstructural evolution and mechanical properties. The magnesium alloy AZ31 sheet was processed by repeated cold rolling and recrystallized annealing. From the experimental works, the fine and equiaxed grains with less than 5 μm were achieved. It was found that for annealing at temperatures in the range of 523–673K, sample was fully recrystallized less than 30 minutes and after that the growth of the recrystallized grains is slight. Finally, the tensile tests were carried out to analyze the changes in the strength and fracture elongation.

Warm Hydroforming of Magnesium Alloy AZ31 Sheets

2007 ◽  
Vol 546-549 ◽  
pp. 333-336 ◽  
Author(s):  
Shi Hong Zhang ◽  
Li Mei Ren ◽  
Li Xin Zhou ◽  
Yong Chao Xu ◽  
G. Palumbo ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Cell Phone ◽  
Tensile Tests ◽  
Maximum Pressure ◽  
Alloy Az31 ◽  
Fine Grained ◽  
Magnesium Alloy Az31 ◽  
Punch Velocity ◽  
Forming Temperature ◽  
Warm Hydroforming

In the present study, warm hydroforming of cell phone cases with magnesium alloy AZ31 sheets was investigated. Fine-grained magnesium alloy sheets were prepared by cross rolling. And the tensile tests were first conducted in order to determine the proper forming temperature. The results showed that the most suitable temperature range appears to be 150-200°C. At last, the magnesium alloy cell phone cases characterized with the small round radius of all edges were formed successfully at 170°C with the low punch velocity and the maximum pressure not less than 5MPa.

Experimental Research on a Novel Iodine-125 Seed Strand Connected Using Magnesium Alloy AZ31

2014 ◽  
Vol 9 (2) ◽  
pp. 249-257
Author(s):  
Chuanxing Li ◽  
Yanling Zhang ◽  
Dong Chen ◽  
Guangfeng Duan ◽  
Zhenyin Liu ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Experimental Research ◽  
Alloy Az31 ◽  
Magnesium Alloy Az31 ◽  
Iodine 125

A comparative study of plastic deformation mechanisms in room-temperature and cryogenically deformed magnesium alloy AZ31

2021 ◽  
Vol 807 ◽  
pp. 140821
Author(s):  
Kai Zhang ◽  
Zhutao Shao ◽  
Christopher S. Daniel ◽  
Mark Turski ◽  
Catalin Pruncu ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Magnesium Alloy ◽  
Comparative Study ◽  
Room Temperature ◽  
Deformation Mechanisms ◽  
Alloy Az31 ◽  
Magnesium Alloy Az31

Modelling Dynamic Recrystallisation in Magnesium Alloy AZ31

2021 ◽  
pp. 102995
Author(s):  
Kenneth J. Tam ◽  
Matthew W. Vaughan ◽  
Luming Shen ◽  
Marko Knezevic ◽  
Ibrahim Karaman ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Alloy Az31 ◽  
Magnesium Alloy Az31 ◽  
Dynamic Recrystallisation
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