Mechanical properties and microstructure of aluminium alloy AW6082-T6 joints welded by double-sided MIG process before and after aging

Baskutis, Saulius; Žunda, Audrius; Kreivaitis, Raimondas

doi:10.5755/j01.mech.25.2.22008

Cited by 8 publications

(2 citation statements)

References 19 publications

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“…At the same time, the welding speed and productivity are better than the TIG process. Several studies have been carried out on the subject of improved MIG welding processes, in which parameters such as current intensity, pulse frequency, filler wire, and travel speed [53][54][55][56][57][58] were investigated in addition to the HAZ extent.…”

Section: Literature Overview On the Heat-affected Zone In Aluminium A...mentioning

confidence: 99%

Parametric Numerical Study of Welded Aluminium Beam-to-Column Joints

2023

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Beam-to-column joints are one of the most common types of joints in metal structures. In the design of load-bearing aluminium structures, welding, as a joining method, is often avoided because of localised degradation of mechanical properties in the heat-affected zone (HAZ). However, recent experimental studies on the extent and strength of the HAZ show a significant difference compared to very conservative design rules when modern welding techniques are used. Therefore, the numerical study conducted in this paper addresses the influence of HAZ on the mechanical behaviour of the welded aluminium beam-to-column joint. Parametric numerical analyses were performed varying the aluminium alloys, the reduced mechanical properties of the HAZ, and different definitions of the HAZ extent. The obtained results show that the highest stress concentration occurs at the connection between the top beam flange and the column flange, resulting in plastic softening in this region. Different joint capacities were observed by varying the mechanical properties of the HAZ. A detailed overview of numerical models as well as the obtained moment–rotation curves show that the behaviour of some models is not as conservative as assumed in the design standards considered.

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Section: Literature Overview On the Heat-affected Zone In Aluminium A...mentioning

confidence: 99%

Parametric Numerical Study of Welded Aluminium Beam-to-Column Joints

2023

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“…The fusion welding, on the other hand, requires joint preparation with large grooves and multiple bead deposits. This results in very poor joint integrity and excessive distortion [22,23]. Further, fusion welding is not applicable for age-hardened aluminum alloys because it reduces strength due to softening.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Tool Design on the Friction Stir Welding of Thick Aluminum Alloy AA6082-T651 Extruded Flats

Bajaj

Siddiquee

Mukhopadhyay

et al. 2020

Metallogr. Microstruct. Anal.

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Fifteen-millimeter-thick aluminum alloy AA6082-T651 extruded flats were friction-stir-welded by using three different types of tool pin profiles, i.e., (1) conical with only left-hand threads (CL), (2) conical with both left-hand and right-hand threads (CLR), and (3) conical cam-tri-flute with left-hand threads (CTFL) up to a height of 6 mm from the pin tip. The microstructures and the mechanical properties across the weld thickness were characterized. Tunneling defect was found at the weld-bottom for the CL tool pin profile and at the weld-top for the CLR pin profile. The reasons behind the formation of such defects have been analyzed and discussed. On the other hand, a defect-free joint was obtained with the CTFL pin profile. Tensile test samples were machined from top, middle, and bottom sections of the welds, and tensile strengths were measured for all the sections to determine the joint efficiencies. Scanning electron microscopy and energy-dispersive X-ray spectroscopy were employed to identify and study the morphology of the coarse phase particles present in the base material and in different regions of the welds. These results were correlated with the microhardness contours plotted across the weld cross section.

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Effect of Conventional and Pulsed TIG Welding on Microstructural and Mechanical Characteristics of AA 6082-T6 Repair Welds

Naing

Muangjunburee

2023

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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Mechanical properties and microstructure of aluminium alloy AW6082-T6 joints welded by double-sided MIG process before and after aging

Cited by 8 publications

References 19 publications

Parametric Numerical Study of Welded Aluminium Beam-to-Column Joints

Parametric Numerical Study of Welded Aluminium Beam-to-Column Joints

The Effect of Tool Design on the Friction Stir Welding of Thick Aluminum Alloy AA6082-T651 Extruded Flats

Effect of Conventional and Pulsed TIG Welding on Microstructural and Mechanical Characteristics of AA 6082-T6 Repair Welds

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