Meeting challenges in welding of aluminum alloys through pulse gas metal arc welding

Praveen, P.; Yarlagadda, Prasad K.D.V.

doi:10.1016/j.jmatprotec.2005.02.224

Cited by 105 publications

(48 citation statements)

References 17 publications

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“…[1][2][3] One of the main methods of reducing vehicle weight is to use a light aluminum alloy with excellent corrosion resistance for fabricating the car body. This aluminum alloy substitutes for the steel structures employed previously.…”

Section: Introductionmentioning

confidence: 99%

Joining of Steel to Aluminum Alloy by AC Pulse MIG Welding

et al. 2009

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This study evaluates the characteristics of welds resulting from joining dissimilar alloys, steel SPRC440 and aluminum alloy 6K21. The joint was obtained by means of AC pulse MIG welding, which alternates between direct current electrode positive (DCEP) and direct current electrode negative (DCEN), based on the EN ratio.In order to evaluate the AC pulse MIG welding for the dissimilar joining of steel SPRC440 to Aluminum alloy 6K21, the arc characteristics in relation with varying EN ratios were analyzed. The AC pulse MIG welding process showed good gap bridging ability. The joining quality of the dissimilar alloys was evaluated by the analyzing the intermetallic compound layer.

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Section: Introductionmentioning

confidence: 99%

Joining of Steel to Aluminum Alloy by AC Pulse MIG Welding

et al. 2009

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“…The properties of aluminium alloys as a light weight material and comparable strength over the conventional 146 materials like steel, cast iron, etc. make it more valuable for automobile and aerospace industry (Kevorkijan, 2002;Praveen & Yarlagadda, 2005). The joining through fusion welding of aluminium alloys results in decrease of the joint strength which puts constraint on their frequent use.…”

Section: Introductionmentioning

confidence: 99%

Friction stir welding process: An investigation of microstructure and mechanical properties of Al Alloy AlMg4.5Mn joint

Kundu¹,

Singh²

2017

10.5267/j.esm

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Aluminium alloy AlMg4.5Mn has got comprehensive acceptance in the manufacturing of light weight frames, marine structures which require high strength and worthy corrosion revulsion. The present investigation work focuses on friction stir welding process in which influences of operating parameters have been studied on friction stir welded butt joints. The FSWed joints specimens have been produced by experimentation at three levels of tool traverse speed and tool rotational speed keeping input force and tool tilt angle constant. Mechanical properties and microstructure of welded joints have been investigated in the present study. Change in the microstructure at different zones which transforms the mechanical properties of welded joints was due to the asymmetrical flow of material and thermal cycles around the pin. The second phase beta grains are formed as the very high temperature reached due to input parameters combinations. Traverse speed (TS) and tool rotational speed (TRS) are taken in a range of 16-40 mm/min and 500-1400 rpm, respectively. The best combination of parameters results in higher tensile strength which is well supported by the micro-hardness curve and the compact grains microstructure profile. Microstructure at different points and physical properties exhibited by the welded joint are well brought into line to summarize the effects of different parameters.

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“…Pitting can continue on fresh sites. Al 3+ ions, highly concentrated in the bottom of the pit, diffuse towards the pit opening and react with the more alkaline solution on the plate surface, facilitating the formation of Al(OH) 3 . Hydrogen micro-bubbles formed in the pit may transport the Al(OH) 3 to the pit opening where it forms an insoluble deposit that appears as white eruptions around the pit surface.…”

mentioning

confidence: 99%

“…Al 3+ ions, highly concentrated in the bottom of the pit, diffuse towards the pit opening and react with the more alkaline solution on the plate surface, facilitating the formation of Al(OH) 3 . Hydrogen micro-bubbles formed in the pit may transport the Al(OH) 3 to the pit opening where it forms an insoluble deposit that appears as white eruptions around the pit surface. The formation of positively charged Al 3+ ions in the bottom of the pit may also attract Cl -ions towards the underside of the pit, encouraging the formation of AlCl 4-(through the reaction Al 3+ +Cl -+6e -→AlCl 4-), as shown in Figure 4.…”

mentioning

confidence: 99%

“…The formation of positively charged Al 3+ ions in the bottom of the pit may also attract Cl -ions towards the underside of the pit, encouraging the formation of AlCl 4-(through the reaction Al 3+ +Cl -+6e -→AlCl 4-), as shown in Figure 4. The accumulation of Al(OH) 3 forms a dome at the pit surface which progressively blocks the pit opening. This can hinder the exchange of Cl -ions which may progressively retard or even arrest pit growth.…”

mentioning

confidence: 99%

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