Properties of Advancing Side of Weld in Joint Welded by FSW

Dudzik, Krzysztof

doi:10.5604/12314005.1133167

Cited by 5 publications

(9 citation statements)

References 5 publications

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“…When hydrogen in the melted welding metal becomes trapped in the welding pool, it forms micro-porosity due to its quick solidification property [23]. The second mechanism is when the instability of the weld pool causes macroporosity when the gas in the weld metal is trapped [21][22][23][24]. The heat that occurs during the welding process quickly diffuses towards the cold areas due to the high thermal conductivity of the aluminium, in turn causing the weld metal to solidify quickly [12].…”

Section: ]mentioning

confidence: 99%

“…The possible loss in magnesium content due to the grain coarsening in HAZs and especially the fusion at the zones close to the base metal in particular also affected the hardness distribution [16,18,20]. It could be asserted that hardness values of the sheets obtained by the deformation during the rolling of these sheets are likely to increase due to the heat input especially in HAZs [18,[21][22][23][24]. Thus, many factors were considered to affect the hardness of the weld zone.…”

Section: ]mentioning

confidence: 99%

“…However, compared to the base metal, the ductility of the welded samples decreased due to the macro-and micro-porosities in the weld seam. Dudzik [21], Cueca et al [22], Casalino et al [23], and Liu et al [24] have all reported that the micro-porosity and porosity defects that occur during the MIG welding negatively affect the mechanical properties of the Al and its alloys. Unfortunately, there has been yet no solution to this issue.…”

Section: Tensile Strengthmentioning

confidence: 99%

“…The studies on joining the aluminium alloys by MIG welding method have been increasingly continuing. In the study by Dudzik [21], 5083, 5059, and 7020 aluminium alloys were welded by MIG welding method, and their mechanical properties were examined. In the study, it was determined that 7020 aluminium alloy had maximum tensile strength, and its tensile strength was higher at the rates of 7.2 and 7.5 % than that of 5083 and 5059 aluminium alloys, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…It is seen in the literature that the problems encountered in welding the aluminium alloys by using the welding process have yet to be resolved entirely. This, therefore, means that further studies on welding of the aluminium alloys are needed [16,18,[20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

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The effects of welding speed on the microstructure and mechanical properties of marine-grade aluminium (AA5754) alloy welded using MIG welding

Çevik¹,

Koç²

2021

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AA5754 aluminium alloys are commonly used in marine and offshore applications as well as in shipbuilding equipment. It is of great importance to weld this alloy in these industrial areas. This study investigated the penetration, microstructure, and mechanical properties of AA5754 Al alloy sheets that were joined using robotic metal inert gas (MIG) welding at different welding speeds. The joints were welded at three welding speeds by keeping the welding current constant, and then macrostructure and microstructure of the samples taken from these joints were examined. Afterward, their hardness, tensile and bending tests were carried out. It was found that the increase in the welding speed decreased the amount of accumulated metal and the penetration rate. Formation of macro-and micro-porosities was observed in the root sections of the weld seams. It appeared that the welding speed increased, the quantity and size of these defects increased, and the mechanical properties were negatively affected by the increase in the welding speed.

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Section: ]mentioning

confidence: 99%

Section: ]mentioning

confidence: 99%

Section: Tensile Strengthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The effects of welding speed on the microstructure and mechanical properties of marine-grade aluminium (AA5754) alloy welded using MIG welding

Çevik¹,

Koç²

2021

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On the local corrosion behavior of coupled welded zones of the 2098-T351 Al-Cu-Li alloy produced by Friction Stir Welding (FSW): An amperometric and potentiometric microelectrochemical investigation

Silva

Izquierdo

Milagre

et al. 2021

Electrochimica Acta

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The galvanic coupling effects and the local electrochemical activity developed along the welded zones in FSWelded 2098-T351 Al-Cu-Li alloy have been investigated using localized electrochemical methods supported by surface analytical characterizations. The investigation was carried out in the coupled welding joint/heat affected zones (WJ/HAZ) for both the retreating (RS) and the advancing (AS) sides. The correlation between surface chemistry, microstructural features and electrochemical activity of these welded zones has been studied. The results showed the development of galvanic interactions within and between the WJ and the HAZ regions that were visualized using the Scanning vibrating electrode technique (SVET) and scanning electrochemical microscopy (SECM). SVET analyses showed that the HAZ was more susceptible to the development of anodic sites compared to WJ. SECM in amperometric operation mode showed that the WJ coupled to HAZ presented higher oxygen consumption and greater cathodic activity compared to HAZ. Furthermore, SECM in the potentiometric operation mode showed alkalization on the WJ and increased acidity on the HAZ, mainly at severe localized corrosion (SLC) sites. Based on SVET and SECM results in combination surface analysis, it is proposed that the micro-galvanic cells formed within these welded zones are due to the presence of secondary phases in the 2098-T351 alloy and their interactions with the adjacent matrix.

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Galvanic and asymmetry effects on the local electrochemical behavior of the 2098-T351 alloy welded by friction stir welding

Milagre

Donatus

Mogili³

et al. 2020

Journal of Materials Science & Technology

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Properties of Advancing Side of Weld in Joint Welded by FSW

Cited by 5 publications

References 5 publications

The effects of welding speed on the microstructure and mechanical properties of marine-grade aluminium (AA5754) alloy welded using MIG welding

The effects of welding speed on the microstructure and mechanical properties of marine-grade aluminium (AA5754) alloy welded using MIG welding

On the local corrosion behavior of coupled welded zones of the 2098-T351 Al-Cu-Li alloy produced by Friction Stir Welding (FSW): An amperometric and potentiometric microelectrochemical investigation

Galvanic and asymmetry effects on the local electrochemical behavior of the 2098-T351 alloy welded by friction stir welding

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