Evaluation of the effect of filler metal interlayer on the weld joint quality in fiber laser welding of alloy steel (A516)

2022 ◽  
Vol 34 (1) ◽  
pp. 012011
Author(s):  
Adnan I. Khdair ◽  
Ahmed B. Khoshaim ◽  
Khaled A. Alnefaie
Keyword(s):  
Laser Welding ◽  
Fiber Laser ◽  
Alloy Steel ◽  
Weld Joint ◽  
Filler Metal ◽  
Fiber Laser Welding ◽  
Joint Quality

scholarly journals A Study on Determining Weld Joint Hardening and a Quality Evaluation Algorithm for 9% Nickel Weld Joints Using the Dilution Ratio of the Base Material in Fiber Laser Welding

Metals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1308
Author(s):  
Minho Park ◽  
Jisun Kim ◽  
Changmin Pyo ◽  
Jaewoong Kim ◽  
Kwangsan Chun
Keyword(s):  
Laser Welding ◽  
Fiber Laser ◽  
Weld Joint ◽  
Base Material ◽  
Welding Process ◽  
Fuel Oil ◽  
Welding Quality ◽  
Dilution Ratio ◽  
Fiber Laser Welding ◽  
Evaluation Algorithm

The demand for LNG-powered ships and related equipment is rapidly increasing among major domestic and foreign carriers due to the strengthened IMO regulations on the sulfur content of ship fuel oil. LNG operation in a cryogenic environment requires a storage tank and fuel supply system that uses steel with excellent brittleness and fatigue strength. A ship using LNG is very sensitive to explosion and fire. For this reason, 9% Ni is often used, because ships require high quality products with special materials and structural technologies that ensure operability at cryogenic temperatures. However, research to derive uniform welding quality is urgent because the deterioration of weld quality in the 9% Ni steel welding process is caused by high process difficulty and differences in welding quality depending on a welder’s skill set. This study proposes a method to guarantee a uniform quality of 9% Ni steel in a fiber laser welding process by categorizing weld joint hardness according to the dilution ratio of a base material and establishing a standard for quantitative evaluation.

scholarly journals Distribution of Al Element of Ti–6Al–4V Joints by Fiber Laser Welding

Coatings ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 566 ◽  
Author(s):  
Jiajia Zhang ◽  
Renzhi Hu ◽  
Shengyong Pang ◽  
Anguo Huang
Keyword(s):  
Laser Welding ◽  
Fiber Laser ◽  
Molten Pool ◽  
Fiber Laser Welding ◽  
Butt Welding ◽  
Solute Element ◽  
Self Diffusion ◽  
The Difference ◽  
Joint Quality

In the process of laser welding, the uneven distribution of solute elements caused by element burning loss and flow of molten pool affects the quality of joints. In this paper, butt welding experiments were conducted on the 3 mm thick Ti–6Al–4V specimens with different preset ratios of Al and Si powders by using 4 kW fiber laser. The distribution of Al solute element and its influence on the microstructure and mechanical properties of the final weld joint were investigated. The results showed that the self-diffusion of Al element and the flow of molten pool affects the alloy elements distribution in laser welding. And the microhardness of the welded joint with Ti–6Al–4V and 90% Al + 10% Si powders was significantly higher than that with only Ti–6Al–4V, with the difference of about 130HV. At the same time, in the joint with 90% Al and 10% Si powders, the acicular α’ size was finer, and basketweave microstructure was present as well. This research is helpful to better understand the distribution of Al solute element and its influence on the joint quality during laser welding of Ti–6Al–4V alloy, which provides a certain reference for improving the weld or surface properties of Ti–6Al–4V alloy during laser processing.

Laser absorption in high-power fiber laser welding of stainless steel and aluminum alloy

2008 ◽  
Author(s):  
Naoyuki Matsumoto ◽  
Yousuke Kawahito ◽  
Masami Mizutani ◽  
Seiji Katayama
Keyword(s):  
Stainless Steel ◽  
Aluminum Alloy ◽  
Laser Welding ◽  
Fiber Laser ◽  
High Power ◽  
Fiber Laser Welding ◽  
Laser Absorption

Dissimilar unbeveled butt joints of AA6061 to S235 structural steel by means of standard single beam fiber laser welding-brazing

2021 ◽  
Vol 291 ◽  
pp. 116994
Author(s):  
D. Wallerstein ◽  
F. Lusquiños ◽  
R. Comesaña ◽  
J. del Val ◽  
A. Riveiro ◽  
...  
Keyword(s):  
Laser Welding ◽  
Fiber Laser ◽  
Structural Steel ◽  
Fiber Laser Welding ◽  
Butt Joints ◽  
Single Beam

Ytterbium fiber laser welding of Ti6Al4V alloy

2015 ◽  
Vol 20 ◽  
pp. 250-256 ◽  
Author(s):  
Giuseppe Casalino ◽  
Michelangelo Mortello ◽  
Sabina L. Campanelli
Keyword(s):  
Laser Welding ◽  
Fiber Laser ◽  
Ti6al4v Alloy ◽  
Fiber Laser Welding

Fiber laser welding of NiTi to Ti-6Al-4V

2015 ◽  
Vol 81 (9-12) ◽  
pp. 1533-1538 ◽  
Author(s):  
R. M. Miranda ◽  
E. Assunção ◽  
R. J. C. Silva ◽  
J. P. Oliveira ◽  
L. Quintino
Keyword(s):  
Laser Welding ◽  
Fiber Laser ◽  
Fiber Laser Welding

Fiber Laser Welding of Noncombustible Magnesium Alloy

2008 ◽  
Vol 580-582 ◽  
pp. 479-482 ◽  
Author(s):  
Yuji Sakai ◽  
Kazuhiro Nakata ◽  
Takuya Tsumura ◽  
Mitsuji Ueda ◽  
Tomoyuki Ueyama ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Magnesium Alloy ◽  
Laser Welding ◽  
Fiber Laser ◽  
Vickers Hardness ◽  
Laser Power ◽  
Welded Joint ◽  
Welding Process ◽  
Fiber Laser Welding ◽  
Laser Welding Process

Noncombustible magnesium alloy AMC602 (Mg-6mass%Al-2mass%Ca) extruded sheet of 2.0mm thickness was successfully welded using a fiber laser welding process at welding speed of 10m/min at 3kW laser power. Tensile strength of the welded joint was about 82 to 88% of that of the base metal. Vickers hardness, tensile strength and micro structural properties are also discussed.

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