Welded Joint
Mostrando 25-36 de 77 artigos, teses e dissertações.
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25. Metallurgical Characterization of API X65 Steel Joint Welded by MIG Welding Process with Axial Magnetic Field
In this work, API X-65 pipeline steel non-conventionally heat treated, to enhance its mechanical resistance, was welded using the Metal Inert Gas (MIG) process with and without the application of low intensity axial magnetic fields (6 mT). Microstructural and mechanical characterization of the welds revealed that the use of the magnetic field during welding
Mat. Res.. Publicado em: 23/03/2017
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26. Effect of Preheating on Microstructure and Tensile Properties of Friction Stir Welded AA7075 Aluminium Alloy Joints
ABSTRACT The high strength AA7075 aluminum alloy is commonly used in the aerospace components due to its exclusive mechanical properties like lightweight and high strength. This alloy cannot be welded by fusion welding techniques due to solidification cracking which severely degrade the mechanical properties of the joint. In contrast, through friction stir w
Braz. arch. biol. technol.. Publicado em: 23/01/2017
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27. Friction Stir Welding of AZ31 Magnesium Alloys - A Numerical and Experimental Study
Abstract In this paper, weldability of magnesium alloys by friction stir welding (FSW) method which is difficult to join by the fusion welding have been investigated experimentally and numerically. To this end, the connection of magnesium alloys was performed using different welding parameters. AZ31 Mg-alloy plates were friction stir welded at rotation speed
Lat. Am. j. solids struct.. Publicado em: 2017-01
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28. Residual Stress, Microstructure and Hardness of Thin-Walled Low-Carbon Steel Pipes Welded Manually
The aim of this work is to evaluate the welding residual stress profile in ASTM A106 Gr. B steel pipes with 4" diameter and to correlate this profile with the microstructure and hardness of the joint. The results showed that the residual stresses are more uniform for a lower welding heat input. Higher welding heat input causes not only a non-uniformity of th
Mat. Res.. Publicado em: 29/09/2016
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29. Efecto del Gas de Protección, Ángulos de Trabajo y Desplazamiento sobre las Características de Juntas de Filete Obtenidas por GMAW en un Acero Microaleado de Alta Resistencia
Abstract: The fillet joint is one of the most used in several industries, particularly in the agricultural machinery. However, many times, the complexity of the parts to be joined difficult welder accessibility, therefore working and travel angles are important variables to analyze. Furthermore, in GMAW process, employing shielding gas mixture Ar-20%CO2 has
Soldag. insp.. Publicado em: 2016-09
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30. Influence of Hydrogenation on Residual Stresses of Pipeline Steel Welded Joints
Hydrogen embrittlement is a phenomenon that affects the performance of steel used for oil and gas pipelines. This paper presents a study of the effect of hydrogenation on the residual stresses of an API 5L X65 steel pipe. Residual stresses were analyzed by X-ray diffraction technique using the sin2Ψ method. The hydrogenation of base metal and welded joint s
Mat. Res.. Publicado em: 15/08/2016
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31. Influence of Interlayer Thickness (Zn) on the Properties of Al 7020 FSW Joints
The use of lightweight materials in the production of cryogenic tanks, spacecraft body etc. are becoming the need to develop dissimilar metal FSW joints. Friction stir welding (FSW) is a novel and inspired light metal joining process since it is not involved with the melting of the parent metal. In this work, two Aluminium 7020 plates were welded with Zn as
Mat. Res.. Publicado em: 10/06/2016
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32. Effect of Heat Input on Mechanical and Metallurgical Properties of Gas Tungsten Arc Welded Lean Super Martensitic Stainless Steel
Welding of 6mm thick AISI: 410S lean super martensitic stainless steel (LSMSS) under different heat input of 7.97, 8.75 and 10.9 kJ/cm was carried out by gas tungsten arc welding process. The influence of heat input on metallurgical and mechanical properties in weld and HAZ region was studied. The tensile tests were carried out at different temperatures, nam
Mat. Res.. Publicado em: 05/04/2016
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33. Friction Stir Welding of Shipbuilding Steel with Primer
Abstract Friction Stir Welding has proven its merits for welding of aluminium alloys and is focused in expanding its material database to steel and titanium and also to assess new joint configurations. The use of welded structures in shipbuilding industry has a long tradition and continuously seeks for innovation in terms of materials and processes maintaini
Soldag. insp.. Publicado em: 2016-03
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34. Evaluation of AH36 microalloyed steel welded joint by submerged arc welding process with one and two wires
Shipbuilding is going through a period of revitalization, growth and technological advancement. One component of these innovations is to improve welding techniques and materials for optimizing processing time, reducing costs and to improve properties and ship performance. The aim of the present work is to evaluate the welding of microalloyed shipbuilding ste
Mat. Res.. Publicado em: 23/02/2016
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35. Friction stir welding of duplex and superduplex stainless steels and some aspects of microstructural characterization and mechanical performance
Friction stir welding was used to produce butt joints on 6 mm thick plates of UNS S32101 lean duplex stainless steel, S32205 duplex stainless steel, and S32750 and S32760 superduplex stainless steels. Fully consolidated joints were achieved, with full penetration, using heat input of 1.37-1.50 kJ/mm. Specimens submitted to tensile testing performed perpendic
Mat. Res.. Publicado em: 12/02/2016
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36. Resistance and elastic stiffness of RHS "T" joints: part I - axial brace loading
Abstract This paper presents a study on the behaviour of welded "T" joints between RHS sections under brace axial loading. A finite element model was developed to investigate the influence of some geometrical variables on the joint's response. The brace load (always in tension) was incremented up to joint failure, while the chord was kept unloaded. In the co
Lat. Am. j. solids struct.. Publicado em: 2015-11