Tailor Welded Blank (TWB) are plates of different specifications welded before forming. The narrow weld length may hamper its characterization in the welded region by conventional tensile methods. New methodologies and alternatives are analyzed. This work aimed to mechanically characterize the welded region of an internal vehicle door panel, manufactured by TWBs. Indirect...
The ASTM A572 Grade 50 material is used in welded structural components in the manufacture of wind turbines. In this way, it is important to apply the stress relief process to correct the effects caused by the welding processes, and then assess the final properties obtained with this process. The objective of this article is to evaluate the mechanical properties of specimens of...
The GTAW process is recognized as a process of high metallurgical quality, being widely used in the pipelines welding, mainly in the root pass. The relative independence between the heat delivered to the melting pool and the amount of material added helps to control the melting of the material and to avoid the appearance of welding discontinuities such as lack of fusion and lack...
AbstractTitanium chips were used with flux components in tubular wires made from the conformation and drawing of metallic strips with different thicknesses. The wires showed internal diameters of different dimensions, affecting fluxes rates filling efficiency. For the same welding conditions, the wires made with the thicker tapes promoted higher short circuit rates in the...
The objective of this work was to evaluate the addition of 1.3% C3H6 to pure CO2 and 0.6% C3H6 to the mixture of Ar+25%CO2 in the welding of carbon steel using the Gas Metal Arc Welding (GMAW) applied to V-groove and T-angle joints. The welds were made using SAE 1020 steel sheets, ER70S-6 weld wire of 1.2 mm, contact tube to workpiece distance (CTWD) of 12 mm, welding speed of...
During Friction Stir Welding (FSW) of complex geometries, the thermal dissipation, induced by geometric features or the surrounding environment, may strongly affect the final weld quality. In order to guarantee a consistent weld quality for different conditions, in-process welding parameter adaptation is needed. This paper studies the effect of thermal dissipation, induced by the...
AbstractOne of the biggest challenges facing the auto industry globally is to develop vehicles that are both lightweight and mechanically resistant. Tailor Welded Blank (TWB) comes as a solution as it is a process that allows butt welding of sheets of different specifications (material, thickness and / or coating) prior to forming. In this research we worked with Interstitial...
AbstractThe Time of Flight Diffraction Technique (ToFD) is a technique of non-destructive testing by ultrasound used for detecting faults and discontinuities in different components, ensuring the quality, reliability and safety. It is widely used in industry, particularly in the evaluation of mechanical parts and structures. It is widely used in the sectors oil/petrochemical...
AbstractThe obtaining of a flux for hardfacing by Submerged Arc Welding (SAW), using ferrochrome-manganese and slag obtained from the simultaneous carbothermal reduction of chromite and pyrolusite is addressed. The ferrochrome-manganese and the slag were obtained, conceiving that both products satisfy the requirements of the components (alloy system and matrix) of an agglomerated...
AbstractThis work was developed to help welding professionals concerning the uncertainties related to the activities of manufacturing, assembly and maintenance of pipes in industrial plants in which it refers to the proper way to conduct activities to qualify welding procedures. It discusses about the methodology for the qualification of industrial tube welding procedures...
AbstractDissimilar Metal Welds (DMWs) union of two different metallic materials has many industrial applications, with emphasis for heat exchangers in nuclear power plants. Therefore, they must have enhanced corrosion and mechanical stress resistances, among other properties. The focus of this work is the analysis of the susceptibility to corrosion of the joint (made by TIG...
AbstractThermocouples are electrical devices of simple design used in temperature measurement and have great use in industry. The thermocouple needs an efficient junction for the two metal wires, commonly done by welding. The welding process can be done in several ways, and the most common and efficient is the capacitive discharge welding, that will fuse the alloy and create a...
AbstractThe bubble formation mechanism is strongly associated with variation in electrical signals and arc stability in underwater wet flux cored arc welding (FCAW). Good understanding of bubble formation mechanism can be helpful in achieving welding parameters that produce better weld beads. This work aims to investigate the dynamic behavior of bubbles formed in underwater wet...
The quasi-stationary state may not be achieved in electrical arc welding of small parts and/or materials of higher thermal conductivity. However, the transient state will always occur at the beginning and end of the welding. In this case, the variation of the energy flow through heat can promote microstructural variations and, consequently, variations of physical properties...
Welding of structures intended for shipbuilding in Brazilian shipyards is often carried out manually. The welding parameters should be adjusted according to the welding position to ensure the quality of the welding joint. However, this adjustment is frequently ignored due to the lack of preparation of professionals or to reduce the machine's downtime. In this context, the present...
Long rails, welded by the Flash-Butt Welding (FBW) process, are the reality of the Brazilian railroads for medium and high axle loads. Although they present desirable characteristics concerning the dynamic behavior of the track, welded joints are regions of structural and mechanical discontinuity where high residual stresses originate, and, consequently, premature fatigue...
Faced with an economic scenario where competition is increasingly intense, the search for processes, techniques and welding equipment that provide gains in productivity is a requirement to ensure the competitiveness of companies in the market. With the development and adoption of new technologies it is possible to innovate the conventional processes, optimizing the performance...