High power diode laser beam scanning in multi-kilowatt range

2004 ◽  
Author(s):  
M. Seifert ◽  
S. Bonß ◽  
B. Brenner ◽  
E. Beyer
Keyword(s):  
Laser Beam ◽  
Diode Laser ◽  
High Power ◽  
Beam Scanning ◽  
Diode Laser Beam ◽  
Laser Beam Scanning ◽  
Power Diode ◽  
High Power Diode Laser

Study of Residual Stress Surface Distribution on Laser Welded Steel Sheets

2013 ◽  
Vol 486 ◽  
pp. 3-8 ◽  
Author(s):  
Zdenek Pala ◽  
Kamil Kolařík ◽  
Nikolaj Ganev ◽  
Jiří Čapek
Keyword(s):  
Residual Stresses ◽  
Laser Beam ◽  
Laser Welding ◽  
Diode Laser ◽  
High Power ◽  
The Body ◽  
Laser Weld ◽  
Steel Sheets ◽  
Power Diode ◽  
High Power Diode Laser

Advent of high power diode laser has substantially contributed to the popularity of laser welding in industry where its virtues such as low heat input and good weld strength are highly appreciated. However, one of the drawbacks of the laser welding is distortion of the welded bodies that is closely linked with the generation and/or redistribution of residual stresses in the vicinity of the weld. In this contribution, mapping of surface macroscopic residual stresses in two directions, i.e. parallel and perpendicular to the welds, were performed for two bodies. The first contained a weld created with the high power diode laser beam speed of 2 m/min and the second with the speed of 15 m/min. Our aim was to compare not only resulting fields of residual stresses, but also to perform qualitative assessment of the possible presence of crystallographic texture and gain a qualitative apprehension about the grain sizes in the vicinity of a laser weld joining two steel sheets. Larger distortion of the body with a laser weld is exhibited by the sample manufactured with approximately 8 times bigger speed of laser beam. This sample is in the immediate vicinity characterized by substantial compressive residual stresses in the direction perpendicular to the weld.

Laser forming of thick steel plates with a high power diode laser

2001 ◽  
Author(s):  
Abe Nobuyuki ◽  
Nakagawa Naoki ◽  
Tsukamoto Masahiro ◽  
Nakacho Keiji ◽  
Sogabe Michihiro ◽  
...  
Keyword(s):  
Diode Laser ◽  
High Power ◽  
Steel Plates ◽  
Laser Forming ◽  
Thick Steel ◽  
Power Diode ◽  
High Power Diode Laser
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