On material flow in Friction Stir Welded Al alloys

Tongne, Amèvi; Desrayaud, Christophe; Jahazi, Mohammad; Feulvarch, Éric

doi:10.1016/j.jmatprotec.2016.08.030

Cited by 105 publications

(35 citation statements)

References 29 publications

(45 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The development of such analysis was not in the framework of this study; however, based on the published literature [27,28], it could be said that under cold weld conditions, due to the stronger thermal gradient and weaker vertical flow, more intense wear is expected. The above observations may be analyzed in terms of the intensity of the vertical material flow during FSW.…”

Section: Effect Of Wear On Microstructuresmentioning

confidence: 91%

Tool Wear Characteristics and Effect on Microstructure in Ti-6Al-4V Friction Stir Welded Joints

Fall

Fesharaki

Khodabandeh

et al. 2016

Metals

View full text Add to dashboard Cite

Abstract:In the present paper, tool wear and the rate of wear during friction stir welding (FSW) of Ti-6Al-4V alloy are investigated. A conical tungsten carbide tool was used to produce butt-type friction stir welded joints in two-millimeter thick Ti-6Al-4V sheets. An original design of a movable pin allowed for the examination of the tool damage for each process condition. The influence of tool degradation on the quality of the welded joints and the damage brought to the microstructure are examined and discussed. For this purpose, optical and scanning electron microscopies as well as EDX analyses were used to examine the tool wear and the resulting macrostructures and microstructures. The type and nature of the defects are also analyzed as a function of FSW processing parameters. Important geometry and weight variations were observed on the pin and shoulder for all welding conditions, in particular when low tool rotation and travel speeds were used. Experimental results also show that the radial wear of the pin is not uniform, indicating the presence of important frictional temperature gradients through the thickness of the joint. The maximum wear was measured at a location of about one millimeter from the pin root center. Finally, tool rotation was determined as the most significant process parameter influencing both tool wear and microstructure of the joints.

show abstract

Section: Effect Of Wear On Microstructuresmentioning

confidence: 91%

Tool Wear Characteristics and Effect on Microstructure in Ti-6Al-4V Friction Stir Welded Joints

Fall

Fesharaki

Khodabandeh

et al. 2016

Metals

View full text Add to dashboard Cite

show abstract

“…Many recent experimental research investigations have proved that, the majority of the defects related with the joints (fabricated using traditional & conventional joining techniques) found to be eliminated completely due to the employment of FSW process, especially during joining of Al alloys [30][31][32][33][34][35][36][37][38][39][40][41]. For example, Yufeng Sun et al [31] performed an experimental investigation during joining of 6061 -T6 Al alloys using FSW process and proved that, the formation of fine grains in the stir zone have resulted in the fabrication of joints, which can withstand shear loads to a maximum of 4500 N, which is very much when compared with that of the joints fabricated using conventional welding techniques.…”

Section: Survey Of Literaturementioning

confidence: 99%

“…Apart from this, the influence of various parameters of the FSW process on the quality of the fabricated AA6082-T6 weldments were predicted using an numerical modelling by Tongne et al [36]. In this investigation, special focus were given to the understanding of the evolution and formation of the banded structures during the FSW process.…”

Section: Survey Of Literaturementioning

confidence: 99%

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

View full text Add to dashboard Cite

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.

show abstract

“…The analysis of the process was based on the influence of a different material position on the welding force and torque measured during the process. Due to the asymmetric heat generation and material transportation between the (AS) and retreating side (RS) [20], it was expected that the difference in strength between the two materials would affect the two measured values.…”

Section: Process Analysismentioning

confidence: 99%

Influence of Alloys Position, Rolling and Welding Directions on Properties of AA2024/AA7050 Dissimilar Butt Weld Obtained by Friction Stir Welding

Barbini

Carstensen

Santos

2018

Metals

View full text Add to dashboard Cite

Friction stir welding (FSW) was carried out for the butt joining of dissimilar AA2024-T3 and AA7050-T7651 aluminium alloys with 2-mm thicknesses. A comparison between the position and orientation of different materials was performed by varying the welding speed while keeping the rotational speed constant. Through an analysis of the force and torque produced during welding and a simple analytical model, the results indicate that the heat input was reduced when the AA7050 alloy was located in the advancing side (AS) of the joint. The different material positions influenced the material transportation and the interface in the centre of the stir zone (SZ). The microhardness of both materials was lower when they were in the AS of the joint. The differences in the hardness values were reduced at higher welding speeds when the heat input was decreased. The mechanical performance increased when the lower strength alloy was located in the AS. The material orientation exhibited a small influence when the AA7050 alloy was in the AS and in general on the resulting microhardness for all the cases analysed. The tensile strength values were very similar for both orientations, but an increase in the yield strength could be measured when the materials were oriented in the transverse direction.

show abstract

On material flow in Friction Stir Welded Al alloys

Cited by 105 publications

References 29 publications

Tool Wear Characteristics and Effect on Microstructure in Ti-6Al-4V Friction Stir Welded Joints

Tool Wear Characteristics and Effect on Microstructure in Ti-6Al-4V Friction Stir Welded Joints

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

Influence of Alloys Position, Rolling and Welding Directions on Properties of AA2024/AA7050 Dissimilar Butt Weld Obtained by Friction Stir Welding

Contact Info

Product

Resources

About