An Investigation on the Effect of Pulsed Nd:YAG Laser Welding Parameters of Stainless Steel 1.4418

2011 ◽  
Vol 383-390 ◽  
pp. 6247-6251 ◽  
Author(s):  
M. Moradi ◽  
M. Ghoreishi ◽  
M.J. Torkamany ◽  
J. Sabbaghzadeh ◽  
M.J. Hamedi
Keyword(s):  
Pulse Duration ◽  
Welding Speed ◽  
Nd:Yag Laser ◽  
Focal Point ◽  
Average Power ◽  
Weld Bead ◽  
Welding Parameters ◽  
Pulsed Nd:Yag Laser ◽  
Pulsed Nd:Yag Laser Welding ◽  
Bead Profile

In the present study, a low average power pulsed Nd:YAG laser is used for bead-on-plate welding of low carbon steel plate. The effect of laser process parameters on the weld quality and weld bead profile, welding penetration (P), welding surface width (W) and welding pool area (A), is studied. Focal point position, welding speed, pulse duration, and energy are selected as the process variables. The formation of a keyhole and weld bead profile is found to be highly dependent on laser pulse parameters. Results show that the maximum penetration accurse when the focal point is above the surface, in pulse duration of 6 ms, welding speed of 2 mm/s and pulse energy of 16.67 J.

Pulsed Nd:YAG Laser Welding of UNS S 32205 Duplex Stainless Steel

2016 ◽  
Vol 869 ◽  
pp. 458-463
Author(s):  
Gillian da S. Crespo ◽  
Josiel L. Padilha ◽  
Celso R. Sokei ◽  
Ruis C. Tokimatsu ◽  
J. Gallego ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Laser Welding ◽  
Duplex Stainless Steel ◽  
Pulse Duration ◽  
Nd:Yag Laser ◽  
Laser Energy ◽  
Cross Sectional ◽  
Pulsed Nd:Yag Laser ◽  
Oil And Natural Gas ◽  
Pulsed Nd:Yag Laser Welding

This paper reports an experimental study of laser welding on duplex stainless steel UNS S32205 employed in the oil and natural gas industries. A pulsed Nd:YAG laser was used to weld the specimens. Bead on plate condition was used. Scanning Electron and Optical microscopy was applied to measure and analyze the cross-sectional of the weld bead. From the experimental results, it was found that the shape and size of the welded spot depend not only on the laser energy, but also on the pulse duration and the focus position. Metallographic observations showed that the microstructure of the weld metal was characterized by large ferrite grains with intra and inter-granular austenite. Large voids delimited by the molten zone boundary were observed in weld beads with low pulse duration. The heat affected zone resulting from the welding is pretty much absent and no cracks were detected.

Pulsed Nd:YAG laser welding of Cu54Ni6Zr22Ti18 bulk metallic glass

2007 ◽  
Vol 449-451 ◽  
pp. 872-875 ◽  
Author(s):  
Jong Hyun Kim ◽  
Changhee Lee ◽  
D.M. Lee ◽  
J.H. Sun ◽  
S.Y. Shin ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Laser Welding ◽  
Bulk Metallic Glass ◽  
Nd:Yag Laser ◽  
Pulsed Nd:Yag Laser ◽  
Pulsed Nd:Yag Laser Welding

High average power six-rod series connection pulsed Nd:YAG laser

2012 ◽  
Vol 24 (5) ◽  
pp. 1047-1051
Author(s):  
姜梦华 Jiang Menghua ◽  
李强 Li Qiang ◽  
雷訇 Lei Hong ◽  
惠勇凌 Hui Yongling ◽  
冯驰 Feng Chi ◽  
...  
Keyword(s):  
Nd:Yag Laser ◽  
Average Power ◽  
High Average Power ◽  
Series Connection ◽  
Pulsed Nd:Yag Laser

scholarly journals Interfacial Characteristics of Dissimilar Ti6Al4V/AA6060 Lap Joint by Pulsed Nd:YAG Laser Welding

Metals ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 71 ◽  
Author(s):  
Xin Xue ◽  
António Pereira ◽  
Gabriela Vincze ◽  
Xinyong Wu ◽  
Juan Liao
Keyword(s):  
Laser Welding ◽  
Nd:Yag Laser ◽  
Laser Beam Welding ◽  
Welding Process ◽  
Mechanical Resistance ◽  
Lap Joint ◽  
Important Indicator ◽  
Pulsed Nd:Yag Laser ◽  
Pulsed Nd:Yag Laser Welding ◽  
Interfacial Characteristics

This paper focuses on the interfacial characteristics of dissimilar Ti6Al4V/AA6060 lap joint produced by pulsed Nd:YAG laser beam welding. The process-sensitivity analysis of welding-induced interface joining quality was performed by using the orthogonal design method. Microstructural tests such as scanning electron microscopy and energy dispersive X-ray spectroscopy were used to observe the interfacial characteristics. The mechanism of interfacial crack initiation, which is an important indicator of joint property and performance, was assessed and analyzed. The preferred propagation paths of welding cracks along the interfaces of different intermetallic layers with high dislocation density were analyzed and discussed in-depth. The results indicate that discontinuous potential phases in the micro-crack tip would mitigate the mechanical resistance or performance of the welded joint, while the continuous intermetallic layer can lead to a sound jointing performance under pulsed Nd:YAG laser welding process.

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