Joining of AZ91 Mg alloy and Al6063 alloy sheets by friction stir welding

prasad, Bateshwar; Neelaiah, G.; Krishna, M. Vamsi; Ramana, S.V.; Prakash, K. Sai; Sarika, G.; Reddy, G. Pradeep Kumar; Dumpala, Ravikumar; Sunil, B. Ratna

doi:10.1016/j.jma.2017.12.004

Cited by 47 publications

(10 citation statements)

References 15 publications

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“…This phenomenon is due to the fact that the larger the size of the grains, the smaller the value of the hardness. As a result, drastic rise in the values of the hardness can be observed whenever there is a reduction in the size of the grains [76][77][78][79]. In this experimental investigation, higher values of hardness have been recorded in the nugget zone, due to the generation of very fine sized grains during the FSW process.…”

Section: Hardness Distribution and Observationmentioning

confidence: 73%

Experimental investigation on the improvement of the properties of the AZ80A Mg alloy joints using friction stir welding process

Sevvel¹,

Mahadevan²,

Sateš³

et al. 2019

FME Transactions

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An experimental investigation was conducted with the basic objective of demonstrating the feasibility of joining the AZ80A Mg alloys using the technique of friction stir welding (FSW). Good quality joints free from defects were obtained for 5mm thickness AZ80A Mg alloy flat plates at a speed of rotation of 750 rpm with a traversing speed of 1.5 mm/min, by employing a FSW tool fabricated out of M35 grade High Speed Steel(HSS). It was experimetally observed that, the nugget zone (NZ) of the defect free weldments were found with fine sized, equally spaced & uniformly distributed grains when compared with that of the parent metal. Apart from this, the heat affected zone (HAZ) lying beside the NZ was found to possess larger sized near equaxied grains due to the effect of annealing. The weld zones were found to possess regions of slight softening nature when compared to that of the parent metal, arising from the dislocation of the lower densities. Moreover, the tensile strength of the defect free weldments was found to be around 78% of the parent metal, which seems to better than that of the strengths obtained using conventional joining techniques.

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Section: Hardness Distribution and Observationmentioning

confidence: 73%

Experimental investigation on the improvement of the properties of the AZ80A Mg alloy joints using friction stir welding process

Sevvel¹,

Mahadevan²,

Sateš³

et al. 2019

FME Transactions

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show abstract

“…In case of AZ31, the variation in microhardness mainly caused by the size of grain and dislocation density 21 while in case of AZ91, Al and Mg solid solution and Al and Mg compound are the main reason. 24 But when size is greater than 10 µm in AZ31 then microhardness value is insensitive to variation in grain size. When grain size is refined then microhardness value increase and follow the Hall-Petch relationship.…”

Section: Resultsmentioning

confidence: 98%

“…No new peaks were observed in XRD analysis of welded sample as shown in Figure 7. 22 , 23 , 24 In Mg alloys which are having hcp crystal structure, slip occures in (002) basal plane during FSW process. 24 High intensity plane in case of 1160 rpm/45 mm-min −1 is (002), while in case of 580 rpm/45 mm-min −1 is (101), but (002) plane intensity is small which shows that (002) plane still exists.…”

Section: Resultsmentioning

confidence: 99%

Study of joining performance of dissimilar Mg alloys in friction stir welding

Singh

Dubey

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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AZ91 and AZ31 Mg alloys are used for lightweight structures with excellent specific strength. Fusion welding of Mg alloys is not suitable due to its high affinity towards oxygen. The present research investigates joining performance of AZ91 and AZ31 using indigenously developed friction stir welding set-up at different welding and rotational speed. The results show that highest value of microhardness within the welded zone was 95.92 Hv on the advancing (AZ91) side. The maximum tensile strength of the welded sample was 85.09% of AZ31. In all the cases, samples broke from the advancing side near the weld centre line.

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“…At the area of the Nugget zone, a sharp connection line was identified and the hardness value reduced rapidly at the Al side. Hardness variation was decreased at NZ and the total hardness was enhanced due to grain resettlement of the revolving tool point [22]. The hardness in that zone is decreased when referred to as HAZ and TMAZ.…”

Section: Analysis Of Microhardnessmentioning

confidence: 97%

Influences of Welding Parameters on Friction Stir Welding of Aluminum and Magnesium: A Review

Haribalaji¹,

Boopathi²

2021

Recent Advancements in Geotechnical Engineering

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Abstract. Friction stir welding (FSW) is an important joining process wherein two dissimilar metals and alloys are welded together using frictional heat produced in a revolving tool and workpiece. FSW is playing an important role in dissimilar material joining of Magnesium (Mg) and Aluminum (Al) materials due to the increasing demand for their industrial applications. In this review article, the research background of FSW processes, and influences of joining factors on tensile strength, micro-hardness, and microstructures of FSW of Al-Mg alloy materials have been studied. The effects of joining factors for example axial force, tool revolving speed, tool incline, speed, and offset on welding characterizes have been enlightened to make defect-free FSW of aluminum and magnesium alloys. The microstructural behaviors of intermetallic formation and material drift in FSW zones of Al-Mg were also studied to find the scope to improve the welding quality.

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Joining of AZ91 Mg alloy and Al6063 alloy sheets by friction stir welding

Cited by 47 publications

References 15 publications

Experimental investigation on the improvement of the properties of the AZ80A Mg alloy joints using friction stir welding process

Experimental investigation on the improvement of the properties of the AZ80A Mg alloy joints using friction stir welding process

Study of joining performance of dissimilar Mg alloys in friction stir welding

Influences of Welding Parameters on Friction Stir Welding of Aluminum and Magnesium: A Review

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