HAZ softening behavior of strain-hardened Al-6.7Mg alloy welded by GMAW and pulsed GMAW processes

Hadadzadeh, Amir; Ghaznavi, Majid Mahmoudi; Kokabi, A.H.

doi:10.1007/s00170-017-0318-x

Cited by 15 publications

(2 citation statements)

References 36 publications

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“…The non-heat treatable Al-Mg alloy 5083, possesses good weldability, formability, anti-corrosive property and high specific strength [1][2][3] and therefore makes it an excellent material for ships, vehicles, pressure vessels and other structural applications [4]. In general, fusion welding approaches like Metal Inert Gas (MIG) and Tungsten Inert Gas (TIG) have been the choice for joining aluminium plates and have been reported to be cost-effective and the most suitable welding procedure for joining AA5083 plates [2,4,5]. TIG welding produces weldments that are stronger, more ductile, and more reliable than MIG welding [6,7].…”

Section: Introductionmentioning

confidence: 99%

Post-weld friction stir processing of AA5083-F TIG welds with scandium added fillers

Aarthi¹,

Sekar²

2022

Mater. Res. Express

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The friction stir processing method was engaged on fusion welded AA5083-F/ER5356 and AA5083-F/ER5356+Sc joints to explore the impact of the process parameters on the mechanical and metallurgical characteristics of the processed weldments. The FSP approach was applied to the TIG-welded joints with pin-less FSP tool. Optical and SEM evaluation was conducted to examine the microstructure of the welds and mechanical analysis such as impact toughness, tensile, microhardness and fractography was performed to evaluate the strength of the weld. The microstructural study of the FSP joints revealed an average grain size of 4 µm for TIG welds and an average of 2 µm for the Sc added TIG weld, when compared to TIG-welded joints, which had an average grain size range of 12 µm and 8 µm for Sc added. All FSPed joints revealed a significant increase in grain refinement. There was a slight improvement in the impact resistance in FSPed samples than TIG welded samples. The FSPed joints' ultimate tensile strength (UTS), which is higher than the tensile strength of the base metal, was 288 MPa for the FSPed joints and 331 MPa with Sc added. The FSP joint's elongation range was decreased to 7.1% but improved for Sc added FSP joints up to 20.5%. The maximum hardness of FSPed TIG-welded joints was 90 HV1, while the maximum hardness of Sc added FSP joints was 95 HV1, which is significantly higher than the maximum hardness of TIG weldments. According to the fractography results, the majority of failure modes are ductile. Therefore, adopting FSP over TIG welding had enhanced the properties of the weld both mechanically and metallurgically.

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Section: Introductionmentioning

confidence: 99%

Post-weld friction stir processing of AA5083-F TIG welds with scandium added fillers

Aarthi¹,

Sekar²

2022

Mater. Res. Express

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“…Based on MIG welding, through the improvement of MIG welding arc mode and welding process, MIG welding has a high application value in the welding of super duralumin alloy. Amir Hadadzadeh et al successfully applied pulsed MIG in welding of strain-hardened Al-6.7Mg alloy, and result showed that overall enhancement in the strength of welds owing to reduction of heat affected zone (HAZ) softening and control of heat input [6]. Liu CJ et al researched the double pulse metal inert gas welding (DP-MIG) of 7075 alloy.…”

Section: Introductionmentioning

confidence: 99%

Microstructural and Mechanical Characteristics of 7075-T6 Aluminum Alloy Joint by Double Wire Pulsed Cold Metal Transition Welding

Zhang

Zhu

et al. 2022

J. Phys.: Conf. Ser.

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In order to solve the problems of low joint strength and poor welding efficiency in fusion welding of 7075-T6 aluminum alloy, the double wire pulsed cold metal transition (DW-CMTP) welding method was used to weld 7075-T6 aluminum alloy. The microstructural and mechanical characteristics of the joints were analyzed by energy dispersive spectroscopy (EDS), scanning electron microscopy (SEM), tensile test and Vickers hardness measurement. The results showed that the DW-CMTP welded joints had good mechanical properties. The highest tensile strength of the joint is 320 MPa without post-weld heat treatment, reaching up to 63% of the basic material. The presence and distribution of micropores in weld joint were manipulate by welding parameters and weakened the joint strength. The fracture location transferred from the heat-affected zone to the fusion zone with the increase of heat input, owing to the change of pore distribution.

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Effect of Al–Si Filler Rods on the Microstructure and Mechanical Properties of TIG-Welded Thick AA5083-F Alloys

Aarthi

Subbaiah

2018

Lecture Notes in Mechanical Engineering

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HAZ softening behavior of strain-hardened Al-6.7Mg alloy welded by GMAW and pulsed GMAW processes

Cited by 15 publications

References 36 publications

Post-weld friction stir processing of AA5083-F TIG welds with scandium added fillers

Post-weld friction stir processing of AA5083-F TIG welds with scandium added fillers

Microstructural and Mechanical Characteristics of 7075-T6 Aluminum Alloy Joint by Double Wire Pulsed Cold Metal Transition Welding

Effect of Al–Si Filler Rods on the Microstructure and Mechanical Properties of TIG-Welded Thick AA5083-F Alloys

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