Publications and responsibilities
Application of LBW and LAHW for fillet welds of 12 and 15 mm structural steel
Laser beam welding (LBW) and laser-arc hybrid welding (LAHW) are attractive joining methods of medium thickness (10-20 mm) plates in a single pass welding technique. Both utilize high energy process in order to achieve high penetration depth and high welding speeds offering substantial increase in p...
Dry hyperbaric welding of HSLA steel up to 35 bar ambient pressure with CMT arc mode
Hyperbaric welding plays a significant role in subsea pipeline installations and repairs for transport of oil and gas from the offshore field to the market. The effect of ambient pressure, from 1 to 35 bar, on penetration depth and microstructure evolution in dry hyperbaric welding of X70 pipeline s...
Metallurgical Aspects in the Welding of Clad Pipelines—A Global Outlook
In the present work, the metallurgical changes in the welding of clad pipelines are studied. Clad pipes consist of a complex multi-material system, with (i) the clad being stainless steel or a nickel-based superalloy, (ii) the pipe being API X60 or X65 high-strength carbon steel, and (iii) the weldi...
Correction to: Application of laser-arc hybrid welding of steel for low-temperature service
Application of laser-arc hybrid welding of steel for low-temperature service
Laser-arc hybrid welding (LAHW) is more often used in shipbuilding and oil and gas industries in recent years. Its popularity arises due to many advantages compared to conventional arc welding processes. The laser beam source is used to achieve much higher penetration depths. By adding filler wire t...
The penetration efficiency of thick plate laser-arc hybrid welding
Laser-arc hybrid welding of thick HSLA steel
Deep penetration fiber laser-arc hybrid welding of thick HSLA steel
The present investigation addresses laser-arc hybrid welding of 45 mm thick steel with variation in a wide range of process parameters. High volume fraction of acicular ferrite formed in the upper part of the weld metal regardless process parameters. Significantly lower fraction of acicular ferrite ...