Tungsten inert gas welding of two aluminum alloys using filler rods containing scandium: the role of process parameters

Vaishnavan, S. Senthur; Jayakumar, K.

doi:10.1080/10426914.2021.1948055

Cited by 7 publications

(2 citation statements)

References 15 publications

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“…phase particles on the aluminium alloy caused by high heat input [24,25]. The heat input has resulted in the dissolution of a majority of Mg 2 Si precipitate, which is the only strengthening present in AA6082 aluminium alloy.…”

Section: Discussionmentioning

confidence: 99%

Influence of pulsed TIG welding process parameters on the mechanical characteristics of AA5083 with AA6082 weldments

Jayakumar¹

2023

Mater. Res. Express

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Aluminium alloys have been widely accepted in manufacturing lightweight materials with high strength. Therefore, welding aluminium alloys is essential in industrial applications to attain complex shapes. In the present work, AA5083 and AA6082 dissimilar alloys were welded using pulsed tungsten inert gas (PTIG) welding since PTIG reduces welding defects more than TIG welding. But to get better mechanical strength on the weld joints, PTIG welding process parameters must be optimized. During PTIG welding, peak current, pulse frequency, and welding speed were chosen as the input parameters, and ultimate tensile strength (UTS) and microhardness were measured as output responses in the current investigation. The UTS of the welded AA5083-AA6082 alloys was predicted using an empirical relationship. For the design of experimental trials, a three-variable, five-stage central composite design is adopted. The findings indicate that the welding speed impacts tensile strength the most, followed by the peak current and the pulse frequency has the least impact. Therefore, the peak current of 197 A, pulse frequency of 4.9 Hz, and welding speed of 181 mm/min was identified as the optimal welding parameters to weld AA5083 and AA6082 alloys with high UTS values. The hardness analysis on the optimized welded samples showed that the lowest hardness values of 40 to 50 Hv0.5 and the highest value of 90 to 100 Hv0.5 were observed on the HAZ of the AA6082 side of the weldment.

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Section: Discussionmentioning

confidence: 99%

Influence of pulsed TIG welding process parameters on the mechanical characteristics of AA5083 with AA6082 weldments

Jayakumar¹

2023

Mater. Res. Express

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“…Fusion welding can be defined as the melting process of parent materials on facing surfaces with a filler material to form a weld bead. The fusion welding process comprises gas welding, arc welding, and intense-energy beam welding [3,4]. Such welding processes have many applications in different industrial sections, such as the manufacture of automobile bodies, aircraft frames, boilers, pressure vessels, ships, and tanks, as well as structural work and the repair of defects in both welded and cast products.…”

Section: Introductionmentioning

confidence: 99%

Review on the Solid-State Welding of Steels: Diffusion Bonding and Friction Stir Welding Processes

Khedr

Hamada

Järvenpää

et al. 2022

Metals

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Solid-state welding (SSW) is a relatively new technique, and ongoing research is being performed to fulfill new design demands, deal with contemporary material advancements, and overcome welding defects associated with traditional welding techniques. This work provides an in-depth examination of the advancements in the solid-state welding of steels through diffusion bonding (DB) and friction stir welding (FSW). Considerable attention was given to DB of steel, which overcame the difficulties of segregation, cracking, and distortion stresses that are usually formed in liquid-phase welding techniques. The defects that affected DB included two types: two-dimensional defects of a metallic lattice, i.e., phases and grain boundaries, and three-dimensional defects, i.e., precipitation. FSW, on the other hand, was distinguishable by the use of relatively low heat input when compared to fusion welding processes such as tungsten inert gas (TIG), resulting in the formation of a limited heat-affected zone. Moreover, fine grain structures were formed in the FSW interface because of the stirring tool’s severe plastic deformation, which positively affected the strength, ductility, and toughness of the FSW joints. For instance, higher strength and ductility were reported in joints produced by FSW than in those produced by TIG. Nevertheless, the HAZ width of the specimens welded by FSW was approximately half the value of the HAZ width of the specimens welded by TIG. Some defects associated with FSW related to the diffusion of elements, such as C/Cr atoms, through the weld zone, which affected the local chemical composition due to the formation of rich/depleted regions of the diffused atoms. Moreover, the lack-of-fill defect may exist when inappropriate welding conditions are implemented. On the other hand, the stirring tool was subjected to extensive wear because of the high hardness values, which negatively affected the economical usage of the FSW process. A summary of the results is presented, along with recommendations for future studies aimed at addressing existing difficulties and advancing the solid-state technology for steel.

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Effect of tool pin shapes on microstructure and mechanical behaviour of friction stir welding of dissimilar aluminium alloys

Balamurugan¹,

Jayakumar²,

Anbarasan

et al. 2023

Materials Today: Proceedings

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Tungsten inert gas welding of two aluminum alloys using filler rods containing scandium: the role of process parameters

Cited by 7 publications

References 15 publications

Influence of pulsed TIG welding process parameters on the mechanical characteristics of AA5083 with AA6082 weldments

Influence of pulsed TIG welding process parameters on the mechanical characteristics of AA5083 with AA6082 weldments

Review on the Solid-State Welding of Steels: Diffusion Bonding and Friction Stir Welding Processes

Effect of tool pin shapes on microstructure and mechanical behaviour of friction stir welding of dissimilar aluminium alloys

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