Investigation on the ASTM A516 Grade 70 narrow gap welded joints obtained by the GMAW process with rotating electrode

The GMAW process with rotating wire is an advance of the conventional GMAW, where the rotational motion of the wire overcomes the main drawback of the sidewall’s lack of fusion, thus allowing narrow gap welding with a significant improvement in productivity and cost reduction. However, the literatur...

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Bibliographic Details
Published in:International journal of advanced manufacturing technology 2024-09, Vol.134 (7-8), p.3453-3464
Main Authors: Costa, Jeferson F. M., Filho, Walker A. S., Jorge, Jorge C. F., Mendes, Matheus C., de Souza, Luís Felipe G., Chuvas, Tatiane C., Araújo, Leonardo S.
Format: Article
Language:English
Subjects:
Base metal
CAE) and Design
Computer-Aided Engineering (CAD
Diamond pyramid hardness
Electron back scatter
Engineering
Filler metals
Gas metal arc welding
Impact tests
Industrial and Production Engineering
Industrial applications
Mechanical Engineering
Mechanical properties
Media Management
Microstructure
Narrow gap welding
Original Article
Pressure vessels
Productivity
Rotation
Tension tests
Thickness
Weld defects
Welded joints
Wire
Wire drawing
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Summary:The GMAW process with rotating wire is an advance of the conventional GMAW, where the rotational motion of the wire overcomes the main drawback of the sidewall’s lack of fusion, thus allowing narrow gap welding with a significant improvement in productivity and cost reduction. However, the literature addressing its potential to substitute the traditional GMAW process in industrial applications is still scarce. This work investigated the microstructure and mechanical properties of an ASTM A 516 Grade 70 steel narrow gap welded joint with 12 mm thickness deposited with higher heat input to provide the deposition of solely two welding passes. The joint was welded in the flat position using a metal cored wire as filler metal, rotation frequency of 1500 rpm, rotation diameter of 3 mm, and average heat input of 3 kJ/mm. After welding, Vickers microhardness, impact Charpy-V, bending, and tension tests were performed to evaluate the mechanical properties of each region of the welded joint, while scanning electron microscopy associated with electron backscattering diffraction techniques was used for the microstructural characterization. The results showed the absence of welding defects and mechanical properties superior to the base metal. Consequently, this process can be suggested as an advantageous alternative to the usual procedures used in industry for welding pressure vessels due to the association of higher productivity and suitable mechanical properties.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-024-14358-1