Effect of laser pulse on recovery delay of arc plasma based on ion migration behavior in the pulsed laser–arc hybrid welding process

2013 ◽  
Vol 51 (2) ◽  
pp. 96-103 ◽  
Author(s):  
Liming Liu ◽  
Minghua Chen
Keyword(s):  
Laser Pulse ◽  
Pulsed Laser ◽  
Welding Process ◽  
Migration Behavior ◽  
Hybrid Welding ◽  
Arc Plasma ◽  
Ion Migration

Pulsed LASER-(Micro)TIG Welding of Automotive Dissimilar Zn-Coated Advanced High Strength Steels Thin Sheets in Overlap Configuration

2016 ◽  
Vol 1138 ◽  
pp. 147-152
Author(s):  
Aurel Valentin Bîrdeanu
Keyword(s):  
High Performance ◽  
Pulsed Laser ◽  
Welding Process ◽  
High Strength Steels ◽  
High Strength ◽  
Industrial Applications ◽  
Cost Ratio ◽  
Hybrid Welding ◽  
Thin Sheets ◽  
Advanced High Strength Steels

The development and implementation into a high number of industrial applications of materials categorized as (Advanced) High Strength Steels (AHSS) due to their high performance per cost ratio is more and more present and this trend is also combined with the development and implementation of new joining technologies and processes, including laser-arc hybrid processes.The paper presents the results of applying Pulsed LASER-(micro)TIG hybrid welding process, for realizing overlap joints for Zn-coated (A)HSS materials in dissimilar configurations, joints that were presented as designed based on UltraLight Steel Auto Body (ULSAB) principles.The influence of main hybrid welding process parameters was investigated in order to establish if one can obtain joints with high values for the shear strength resistance for some of the actually used dissimilar steel combinations based on designs applied throughout ULSAB project and the autos built following these principles.

Pulsed LASER-(micro)TIG hybrid welding: Process characteristics

2012 ◽  
Vol 212 (4) ◽  
pp. 890-902 ◽  
Author(s):  
Aurel-Valentin Bîrdeanu ◽  
Cristian Ciucă ◽  
Alexandru Puicea
Keyword(s):  
Pulsed Laser ◽  
Welding Process ◽  
Hybrid Welding ◽  
Process Characteristics

Shear Strength Variation for PLmT Welded Zn Coated Advanced High Strength Steels Used in Automotive Structures in Overlap Configuration

2015 ◽  
Vol 1111 ◽  
pp. 205-210
Author(s):  
Aurel Valentin Bîrdeanu
Keyword(s):  
Shear Strength ◽  
Laser Pulse ◽  
Process Parameters ◽  
Influence Factors ◽  
Welding Process ◽  
High Strength Steels ◽  
High Strength ◽  
Strong Interactions ◽  
Hybrid Welding ◽  
Advanced High Strength Steels

The paper presents the results of applying of a new hybrid welding process, i.e. Pulsed LASER-(micro)TIG (PLmT), for realizing overlap joints for Zn-coated U/AHSS thin sheets materials, used in the automotive industry for realizing car structures. The statistical influence onto the joint’s shear strength (objective function) of three hybrid welding process parameters was investigated by means of experimental design and weighted. The influence of laser pulse peak power, the average welding TIG current and the laser pulse duration was investigated for two types of Zn coated U/AHSS used in car body realization. The results revealed that the new process can be applied for the investigated materials and that joints with appropriate shear strength values can be obtained. Each combination did behave rather different in respect to the investigated process parameters and the results did reveal that rather strong interactions are in place between the influence factors (IF) for CPW 800 material. The determined models can be used to select convenient process parameters combinations in respect to minimum Zn coating damage and proper shear strength of the joints for each of the studied materials.

scholarly journals Experimental studies on the possibility of using a pulsed laser for spot welding of thin metallic foils

2020 ◽  
Vol 10 (1) ◽  
pp. 674-680
Author(s):  
Piotr Sęk
Keyword(s):  
Experimental Studies ◽  
Pulsed Laser ◽  
Welding Process ◽  
Pulse Mode ◽  
Weld Strength ◽  
Spot Welds ◽  
Butt Welding ◽  
Strength Tests ◽  
Metallic Foils ◽  
The Impact

AbstractThe purpose of the experiment was to study the influence of the laser beam in pulse mode on metallic foils in order to obtain a spot weld. The welding process was carried out using the overlap weld method, using spot welds in various quantities. The Nd - YAG BLS 720 pulsed laser was used to conduct the experiment. The impact of the number of spot welds on the value of force needed to break the sample was examined. A number of measurements were carried out to determine the best process parameters. Butt welding and overlap welding were also performed using a continuous weld consisting of spot welds. Weld strength tests were performed to select the most appropriate parameters for the process under consideration.

Effect of pulsed laser target cleaning on ionisation and acceleration of ions in a plasma produced by a femtosecond laser pulse

2005 ◽  
Vol 35 (10) ◽  
pp. 953-958 ◽  
Author(s):  
Roman V Volkov ◽  
A A Vorobiev ◽  
Vyacheslav M Gordienko ◽  
M S Dzhidzhoev ◽  
I M Lachko ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Femtosecond Laser ◽  
Femtosecond Laser Pulse ◽  
Pulsed Laser ◽  
Laser Target
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