The influence of stirrer geometry on bonding and mechanical properties in friction stir welding process

Boz, Mustafa; Kurt, Adem

doi:10.1016/j.matdes.2003.11.005

Cited by 130 publications

(74 citation statements)

References 12 publications

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“…Many researchers have studied joining of 1XXX series aluminum and have found that FSW parameters have key roles in obtaining a sufficient joint performance and microstructural evolution [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Tool Tilt Angle on 1050 Aluminum Lap Joint in Friction Stir Welding Process

Barlas

2017

Acta Phys. Pol. A

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In this paper, the effect of tool tilt angle on tensile-shear failure load and weld zone properties for 1050 aluminum plates, welded by friction stir lap welding, were investigated. For this purpose, tool tilt angle was varied from 0• to 5• under the constant other parameters, such as tool geometry, tool rotation speed of 1200 rpm and tool travel speed of 30 mm/min. The tensile-shear test was employed to test the mechanical properties of the joint. Optical microscope examinations, microhardness and temperature measurements were also performed in weld zone of lap joints. According to overall results, the tool tilt angle has a reasonable influence on the joint soundness and weld defect formation. If the tool axis was perpendicular to plate surface or a larger tool tilt angle was used, such configurations had harmful effect for the weld zone. In such case the tensile-shear failure load dropped from 4853 N to 2799 N. Recorded peak temperatures varied from 381• C to 438• C in the weld center. The measured mean hardness values of the stir and heat-affected zones were 31.5 HV and 28.3 HV, respectively, which are lower than that of aluminum 1050 base metal (40.7 HV).

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Section: Introductionmentioning

confidence: 99%

The Influence of Tool Tilt Angle on 1050 Aluminum Lap Joint in Friction Stir Welding Process

Barlas

2017

Acta Phys. Pol. A

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“…The melting point of the material is not reached in the process. The material undergoes a plasticizing process during the passage of the tool and a dynamic recrystallization during cooling [7,8,9]. At the end of this process one can distinguish several zones in the region of the weld in which the evolution of the microstructure is controlled by a complex interaction between plastic strain, recovery and recrystallization.…”

Section: Introductionmentioning

confidence: 99%

Residual stresses of a magnesium alloy (AZ31) welded by the friction stir welding processes

2016

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Abstract. The objective of this study was to evaluate the residual stresses of FSW welding magnesium alloys (AZ31). The results show that the FSW processes lead to the formation of several distinct zones with differing mechanical properties. The residual stresses evolution have been explained by the heterogeneous modifications of the microstructure particularly a marked decrease in the grain size, a high modification of the crystallographic texture and the different anisotropic properties resulting from plasticity induced by the FSW process.

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“…Other studies, carried out on a wide variety of precipitation hardened aluminum alloys, the influence of FSW process parameters on the characteristics of the precipitates and their impact on hardness profile has been investigated and mostly related to the local amount of heat generated by the rotating tool [11][12][13][14][15]. Therefore tool geometry plays a critical role in obtaining defect free FSW joints and its selection have a direct impact in optimizing of the other process parameters such as tool rotation speed, tool advance, etc.…”

Section: Introductionmentioning

confidence: 99%

“…An extensive review of the literature indicates that tool geometry has a determining effect on the flow of the material beneath the shoulder and hence the elimination of the kissing bonds. However, due to the highly dynamic nature of the process and the difficulty in mathematically formulating and predicting material flow, the tool geometry optimization has been mostly based on experience [3,5,9,[11][12][13][14][15]. Specifically, Zhao et al [2] found optimum joint properties in a 2014 aluminum alloy using a screw pitched taper stirrer pin.…”

Section: Introductionmentioning

confidence: 99%

Friction stir lap welding of 5456 aluminum alloy with different sheet thickness: process optimization and microstructure evolution

Salari

Jahazi

Khodabandeh

et al. 2015

Int J Adv Manuf Technol

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The influences of friction stir welding process parameters on microstructure evolution and mechanical properties of lap welded 5456 aluminum alloy plates with different thickness and temper conditions were investigated. The upper plate was 5mm thick, cold rolled aluminum alloy 5456-T321 and the lower plate was 2.5mm annealed sheet (5456-O). Four different pin geometries (conical thread pin, cylindrical-conical thread pin, stepped conical thread pin, and Flared Triflute pin tool) and two rotational speeds (600 and 800rpm) were used to produce the joints. Microstructures and microhardness values in the weld nugget (WN), thermomechanically affected zone (TMAZ), and the heat affected zone (HAZ) were examined and correlated with selected processing conditions. Specifically, the influence of tool geometry on the flow of the plasticized material in the nugget zone, extent of hooking defect, and mechanical properties (microhardness) of the FSW joints were documented and quantified.It was found that weld joints made by using the stepped conical thread pin tool produced a homogeneous microstructure with finer grain size (5.4 µm) and higher microhardness levels than the other tools. The optimum processing conditions resulting in sound and defect free joints with highest mechanical properties were obtained with the stepped conical thread pin and 600rpm rotational speed.The evolution of the microhardness in each region is characterized and related to processing conditions.

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The influence of stirrer geometry on bonding and mechanical properties in friction stir welding process

Cited by 130 publications

References 12 publications

The Influence of Tool Tilt Angle on 1050 Aluminum Lap Joint in Friction Stir Welding Process

The Influence of Tool Tilt Angle on 1050 Aluminum Lap Joint in Friction Stir Welding Process

Residual stresses of a magnesium alloy (AZ31) welded by the friction stir welding processes

Friction stir lap welding of 5456 aluminum alloy with different sheet thickness: process optimization and microstructure evolution

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