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Butt welding

About: Butt welding is a research topic. Over the lifetime, 7153 publications have been published within this topic receiving 44467 citations.


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01 Jan 2013
TL;DR: In this paper, the welding parameter current was optimized for Alloy 6082 and the wide range of current was selected by performing the trial runs, the results of trial butt joint was welded by TIG welding process.
Abstract: Aluminum and its alloys have excellent corrosion properties owing to the tenacious oxide layer, ease of fabrication. In the construction of pressure vessels and storage tanks, the weld ability play unique role in selection of materials from the various materials. Aluminum alloy 6082 is a medium strength alloy with excellent corrosion resistance. It has the highest strength among the 6000 series alloys. The preferred welding process of aluminum alloy is Tungsten Inert Gas (TIG) welding due to its comparatively easier applicability and better economy. In this paper welding parameter current was optimized for Alloy 6082. The wide range of current was selected by performing the trial runs. As per results of trial butt joint of Alloy 6082 was welded by TIG welding process. Microstructure and hardness were analyzed and optimum current was found.

11 citations

Journal ArticleDOI
TL;DR: In this article, the influence of time, temperature and time interval between thermal exposures was assessed comparing the microstructures, and the results are crucial to perform a fatigue-creep interaction life assessment of the critical parts of the structure in the near future.
Abstract: Exhaust pipes of naval gas turbines are made of thin wall tubing of stainless steel grade AISI 316L. The tubes are fabricated by butt welding of different sections with longitudinal and circumferential joints. The plate thickness is about 4.0 mm, and the working temperature varies between 600 °C and 400 °C in the critical zones of the pipe, in the lower and central areas, respectively. The loadings in the tube induce high-temperature fatigue and creep-fatigue cracks have nucleated and propagated in the tube near some welded joints. The paper presents FCGR data obtained in CT specimens of used material taken from the pipes and tested at RT, 3 3 5, 500 and 600°C. Preliminary creep data obtained in tension, in thin-sheet specimens (about 4 mm thickness), also taken from the conduct wall and tested at 500, 550 and 600 °C are also given. These results are crucial to perform a fatigue-creep interaction life assessment of the critical parts of the structure in the near future. Finally, the paper presents results of research work to investigate carbide precipitation and formation in virgin thin-sheet specimens subjected to several types of thermal exposures. In some cases, 3-4 d was the time interval between exposures. Grain size measurements were carried out together with microstructural observations in the SEM. The influence of time, temperature and time interval between thermal exposures was assessed comparing the microstructures.

11 citations

Journal ArticleDOI
TL;DR: In this paper, the tensile properties of 2 mm AA6060-T6 profiles at room temperature (RT) using the HYB process and AA6082-T4 as filler material (FM) were evaluated as a followup of the three-point bend testing done in Part I.
Abstract: The present investigation is concerned with solid state butt welding of 2 mm thin AA6060-T6 profiles at room temperature (RT), using the HYB process and AA6082-T4 as filler material (FM). In Part II of this investigation the tensile properties of the butt weld have been evaluated as a follow-up of the three-point bend testing done in Part I. In the HYB case the weld can be sub-divided into two distinct zones, i.e. the Extrusion Zone (EZ) and the Heat-Affected Zone (HAZ). The EZ, which is a composite material consisting of a mix of a strong FM and a soft HAZ material, displays superior tensile properties compared to the HAZ. By allowing for this in the subsequent finite element (FE) simulations of the load-bearing capacity of the joint, the observed stress-strain response of the HYB weld has been fully reproduced and rationalized. These results show that the tensile properties are comparable with those reported for FSW of 2 mm AA6082-T6 profiles and surpass those reported for FSW of 2 mm 6061-T6 profiles as far as the yield strength is concerned.

11 citations

Journal ArticleDOI
TL;DR: In this paper, an advanced method of dual laser-beam bilateral synchronous welding-brazing was proposed to regulate the inhomogeneous interfacial reaction during laser welding of Ti/Al dissimilar alloys.
Abstract: To regulate the inhomogeneous interfacial reaction during laser welding-brazing of Ti/Al dissimilar alloys, an advanced method of dual laser-beam bilateral synchronous welding-brazing was proposed. The formation mechanism of the intermetallic compounds (IMCs) with various dual laser-beam input was analyzed. The experimental results revealed that sound brazing joints with homogeneous serrated-shaped IMCs along the Ti/Al interface were obtained when the laser power on both sides is the same. An interesting phenomenon can be found that the thickness of IMCs layer on both sides is thicker than the middle. The highest bonding strength of Ti/Al butt joints could reach up to 71% of aluminum alloy base metal due to homogeneous serrated-shaped IMCs with a thickness of 3–4 μm.

11 citations

Patent
19 Nov 1981
TL;DR: In this paper, the welding apparatus is used for the purpose of butt-welding of plastic pipes of diameters larger than 500 mm and all the work is performed by means of welding apparatus from inside the pipe.
Abstract: The welding apparatus serves for the purpose of butt-welding of plastic pipes of diameters larger than 500 mm. All the work is performed by means of the welding apparatus from inside the pipe. Thereby the working time is reduced, the welding quality ensured, and the installation becomes faster. Lifting cranes and heating tents become unnecessary. A novelty is also the possibility of welding pipes together at an angle position. As the welding apparatus is collapsible, it may also be advantageously used for repair work on old pipes in the ground (relining), with a minimum exposure of the pipes.

11 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202328
2022122
2021112
2020219
2019290
2018349