Study of heat-affected zone and mechanical properties of Nd-YAG laser welding process of thin titanium alloy sheet

2016 ◽  
Vol 1 (2) ◽  
pp. 51-58 ◽  
Author(s):  
Grzegorz Krolczyk ◽  
Aleksandar Sedmak ◽  
Uday Kumar ◽  
Somnath Chattopadhyaya ◽  
A. K. Das ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloy ◽  
Laser Welding ◽  
Heat Affected Zone ◽  
Welding Process ◽  
Alloy Sheet ◽  
Yag Laser ◽  
Laser Welding Process

An experimental study on joining of AISI 304 SS to Cu by Nd-YAG laser welding process

2020 ◽  
Vol 33 ◽  
pp. 5262-5268 ◽  
Author(s):  
Bikash Ranjan Moharana ◽  
Sushant Kumar Sahu ◽  
Anway Maiti ◽  
Susanta Kumar Sahoo ◽  
Tapas Kumar Moharana
Keyword(s):  
Experimental Study ◽  
Laser Welding ◽  
Welding Process ◽  
Aisi 304 ◽  
Yag Laser ◽  
Laser Welding Process

Metallurgical and Wear Behaviour of Stellite 6 Reinforced Stainless Steel 316 Joints by Nd-YAG Laser Welding Process

2019 ◽  
Author(s):  
Varun Kumar Arulvizhi ◽  
Selvakumar Alandur Somasundaram ◽  
Balasrinivasan Murugan ◽  
Ravikumar Natarajan ◽  
Abdur Rahman Kalam
Keyword(s):  
Stainless Steel ◽  
Laser Welding ◽  
Welding Process ◽  
Wear Behaviour ◽  
Yag Laser ◽  
Stellite 6 ◽  
Stainless Steel 316 ◽  
Laser Welding Process

Thermal Defocussing Criteria for a Laser Welding Process

2004 ◽  
Author(s):  
Gregory J. Kowalski ◽  
Richard A. Whalen
Keyword(s):  
Laser Beam ◽  
Laser Welding ◽  
Phase Change ◽  
Heat Affected Zone ◽  
Solid Phase ◽  
Welding Process ◽  
Index Of Refraction ◽  
Simulation Code ◽  
Collimated Beam ◽  
Laser Welding Process

A numerical simulation code is developed to study the significance of refraction effects (beam self-focussing or defocussing) of a laser during a laser welding process. Relationships between the size of the heat affected zone (HAZ), the melt zone and the laser beam parameters are investigated for a short pulsed laser welding process. The solution method includes the thermally stimulated nonlinear optical effects caused by the temperature dependent index of refraction, as well as the step change in surface reflection that occurs due to the liquid and solid phase change. The interaction of these parameters is investigated to better control the laser manufacturing processes. Difficulties of numerical modeling and the tradeoff between using small nodes to reduce the sawtooth behavior in the phase change model and computer run times that are consistent with real time control are discussed. The results indicate that there are no significant refraction affects of the laser beam and that the heat affected zone is approximately 6% larger for a collimated beam input as compared to a gaussian beam input. Peak temperatures are lower for the collimated beam.

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