Laser Welding of Titanium Alloys with an Yb: YAG Disk Source

In this paper, the laser welding of thin titanium sheet in a butt joint configuration are investigated using a continuous Yb: YAG disk source, with high beam quality and a particular fiber configuration, enable to provide a broad range of beam diameters with different intensity distribution. The thermal efficiency of the laser process is discussed as a function of the fiber type. The weldability results for the CP Ti grade 2 and the Ti-6Al-4V titanium alloy are expressed in terms of full penetration, and correct bead geometry (NF L06-395-2000). Full penetration welds are easily achieved with the core fiber, but the outer fiber produces welds with limited geometric defects. Butt joints microstructure consists of an acicular α phase in the fusion zone for CP Ti, and a martensitic α’ phase for the Ti-6Al-4V alloy. Tensile test results confirm a similar or slightly higher joint strength for the full penetration welds, compared with the parent metal.

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A study on use of wobble features in laser welding of low alloy steel joint with butt joint configuration

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/1135/1/012021 ◽

2021 ◽

Vol 1135 (1) ◽

pp. 012021

Author(s):

Timo Kankala ◽

Antti Salminen

Keyword(s):

Laser Welding ◽

Focal Point ◽

Beam Quality ◽

Welding Process ◽

Butt Joint ◽

Air Gap ◽

Low Alloyed Steel ◽

Tool Diameter ◽

Welding Processes ◽

Beam Manipulation

Abstract Laser welding is modern digital welding process, which thanks to several advantages over traditional welding processes, is gaining ever growing role in manufacturing. The process has still some weaknesses. The better the beam quality the smaller the focal point, the actual welding tool, diameter is. Typically, because of this the welding of joints with lesser quality e.g. larger air gap is difficult or even impossible. So-called beam manipulation opens opportunities to deal with the problem. The dynamic beam manipulation gives opportunities to control the weld dimensions during the welding process by the requirements of individual locations of weld joint. This study used the two dimensional scanner to manipulate beam during welding with so called wobble function. Four different wobble configurations were tested in welding of low-alloyed steel with different joint qualities. The wobble typically made the welds wider, provided typically higher heat input and thus lowered the hardness of the joint. Wobble increased typically the root quality, but there are differences between different wobble parameters. It was possible to weld joints with wider air gaps in the selected material thickness, but the wider air gap and wobble caused finally, when wide enough the sagging of the joint.

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A neural network to analyze plasma fluctuations with the aim to determine the degree of full penetration in laser welding

International Congress on Applications of Lasers & Electro-Optics ◽

10.2351/1.5058831 ◽

1994 ◽

Cited By ~ 5

Author(s):

E. Beyer ◽

D. Maischner ◽

Ch. Kratzsch

Keyword(s):

Neural Network ◽

Laser Welding ◽

Plasma Fluctuations ◽

Full Penetration

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Enhanced wetting behavior using femtosecond laser-textured surface in laser welding-brazing of Ti/Al butt joint

Optics & Laser Technology ◽

10.1016/j.optlastec.2021.107212 ◽

2021 ◽

Vol 142 ◽

pp. 107212

Author(s):

Xi Chen ◽

Zhenglong Lei ◽

Yanbin Chen ◽

Meng Jiang ◽

Nan Jiang ◽

...

Keyword(s):

Femtosecond Laser ◽

Laser Welding ◽

Butt Joint ◽

Textured Surface ◽

Wetting Behavior

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Effect of Laser Welding Process Parameters on Microstructure and Mechanical Properties on Butt Joint of New Hot-Rolled Nano-scale Precipitation-Strengthened Steel

Acta Metallurgica Sinica (English Letters) ◽

10.1007/s40195-014-0081-z ◽

2014 ◽

Vol 27 (3) ◽

pp. 521-529 ◽

Cited By ~ 24

Author(s):

Min Zhang ◽

Xiaonan Wang ◽

Guangjiang Zhu ◽

Changjun Chen ◽

Jixin Hou ◽

...

Keyword(s):

Mechanical Properties ◽

Laser Welding ◽

Process Parameters ◽

Welding Process ◽

Butt Joint ◽

Nano Scale ◽

Microstructure And Mechanical Properties ◽

Hot Rolled ◽

Laser Welding Process

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Formation mechanism and prevention of weld defects in full penetration laser welding of thick steel plates

International Congress on Applications of Lasers & Electro-Optics ◽

10.2351/1.5060188 ◽

2004 ◽

Cited By ~ 3

Author(s):

Susumu Tsukamoto ◽

Goro Arakane ◽

Hiroshi Honda ◽

Seiji Kuroda

Keyword(s):

Laser Welding ◽

Formation Mechanism ◽

Steel Plates ◽

Weld Defects ◽

Full Penetration ◽

Thick Steel

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APLIKASI NON DESTRUCTIVE TEST PENETRANT TESTING (NDT-PT) UNTUK ANALISIS HASIL PENGELASAN SMAW 3G BUTT JOINT

JTT (Jurnal Teknologi Terapan) ◽

10.31884/jtt.v3i2.61 ◽

2017 ◽

Vol 3 (2) ◽

Author(s):

Tito Endramawan ◽

Emin Haris ◽

Felix Dionisius ◽

Yuliana Prinka

Keyword(s):

Mild Steel ◽

Welding Process ◽

Butt Joint ◽

Test Results ◽

Acceptance Criteria ◽

Destructive Test ◽

Non Destructive ◽

Penetrant Testing

The purpose of the research are determine acceptance criteria the specimen based on ASME standard. The research used mild steel materials with hardness 220 HVN with sized 30 cm x 20 cm x 1.2 cm then SMAW welding process position of 3G buttjoint with rooting electrode LB 52U diameter 2.6 mm used current 70 Amper and voltage 380 volt, for Filler used LB 5218 electrode 3.2 mm with current of 80 Amper and voltage of 380 volts. The welding process influenced by many factor which cause failure. The method for inspect result of weld used Non Destructive Test Penetrant Testing (NDT PT) and used ASME standard for acceptance criteria. The test results showed the discontinuity of porosity on the surface of the welded product in specimen 1 is the largest rounded 5 mm at 233 mm distance so that based on the acceptance criteria of AWS standard, the welding result is accepted and the specimen 2 there is discontinuity at 233 mm with the size of 8 mm so that Otherwise rejected. This rejected result can be improved by gouging the discontinuity and then welded.

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