The attractiveness of additive techniques to refurbish worn components requires the availability of data from different process. This study correlates two additive techniques, Plasma Transferred Arc (PTA – AM) and Direct Laser Deposition (DLD), using IN 625 wire. Specific features of each technique are discussed regarding their potential use to recover geometry and properties of...
The main goal of the present work is to evaluate the behavior of welded joints obtained by the GMAW with rotating electrode process (GMAW-RE) in comparison to the Conventional GMAW process (GMAW). Multipass welding by both processes were performed in ASTM A36 steel plates with dimensions of 500 × 150 × 10 mm, preheating of 100 °C in the flat position and average welding energy of...
During the welding process ASTM A131 Grade AH36 microalloyed steel may exhibit thermal cycling defects (distortions) that will require costly procedures such as post-weld heat treatment. In addition, this steel is not indicated to undergo normalization, normalization followed by tempering, or quenching and tempering. In this case, the double layer technique, which is based on the...
The attractiveness of additive techniques to refurbish worn components requires the availability of data from different process. This study correlates two additive techniques, Plasma Transferred Arc (PTA – AM) and Direct Laser Deposition (DLD), using IN 625 wire. Specific features of each technique are discussed regarding their potential use to recover geometry and properties of...
Dissimilar AA5083 and C101 pure copper linear friction welds were prepared using different forging pressures (60 MPa, 80 MPa, and 110 MPa) to investigate the influence of the forging pressure on the microstructural and mechanical properties development using optical microscopy (OM), scanning electron microscopy (SEM), hardness measurements, and tensile testing. The in-situ...
The welding of dissimilar joints is very common in systems used in oil exploration and production in deep waters. This commonly involves welding low carbon steel pipes with valves, pumps or other pipes, all of them made of alloy steel. Inconel has been used in such welding as filler material; however, this welding is preceded by a process of buttering in the low alloy steel side...
In this study, we sought to analyze the variability of instruments used in industry to evaluate the geometric characteristics of a welding point. For this purpose, the design of experiments technique was used to generate a fractional factorial design for the welding parameter configurations in test specimens of hot dip galvanized steels in order to represent the real amplitude of...
This study discusses the microstructure, quasi-static mechanical strength and failure modes of TWIP steel weld spots. Weld spots were produced by varying the main resistance spot welding parameters: welding current, welding time and electrode compression force. All the samples showed a remarkable material hardness mismatch between the fusion zone, the heat affected zone and the...