Mechanical, microstructural and fracture properties of dissimilar welds produced by friction stir welding of AZ31B and Al6061

Dorbane, Abdelhakim; Mansoor, Bilal; Ayoub, Georges; Shunmugasamy, Vasanth Chakravarthy; Imad, A.

doi:10.1016/j.msea.2015.11.019

Cited by 113 publications

(56 citation statements)

References 44 publications

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“…At the same welding parameters, superior grain refinement, higher hardness and better strength are achieved in weld nuggets also by means of a scrolled FSW tool. 12 Studies proved the influences of various rotational speeds and friction-stir-welding tool geometries on the macrostructure, microstructure and joint strength. Four tool-pin profiles (a conical-thread pin, a cylindrical conical-thread pin, a stepped conical-thread pin and a flared Triflute-pin tool) and two rotational speeds, 600 min -1 and 800 min -1 , were used.…”

Section: Introductionmentioning

confidence: 97%

Effect of pin profiles on the mechanical properties of friction-stir-welded AA5383 and AA7075

Kumar¹,

Anbumalar²

2020

Mater. Tehnol.

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Friction-stir welding (FSW) is an unyielding-state welding process developed by The Welding Institute, United Kingdom. FSW is mainly based on the tool geometry, process parameters and welding material. The tool geometry plays the principle role in obtaining desirable microstructures of the welds, improving the strength and fatigue resistance of the joints. Currently, friction-stir-welding tools are designed using the trial-and-error method. In this study, three different types of FSW tools are considered for the fabrication of butt joints from AA5383 and AA7075. Various tool profiles such as the cylindrical taper projection, cylindrical thread-pin projection and triangle-pin projection are considered in the present study. The pin profiles are assessed based on the weld quality during tensile tests and hardness tests conducted on welded samples. With the analysis, it is found that the triangular pin produces sound welds at an 800-min-1 speed, 20-mm/min feed and 4-kN load.

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Section: Introductionmentioning

confidence: 97%

Effect of pin profiles on the mechanical properties of friction-stir-welded AA5383 and AA7075

Kumar¹,

Anbumalar²

2020

Mater. Tehnol.

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“…The ability to produce components from different light alloys and integrate them into the automotive and aerospace industry, is the main technical challenge that places bonding methods as an important part of their manufacture [1,2]. Aluminum (Al) and magnesium (Mg) alloys are increasingly used in these industries because of their low density and high mechanical strength [2][3][4], however, the use of conventional fusion welding processes leads to the formation of intermetallic compounds (IMC) in the melting zone, generating high hardness and low ductility in the joints [5,6].…”

Section: Introductionmentioning

confidence: 99%

Friction Stir Welding of Dissimilar AA6061-T6 to AZ31B-H24 Alloys

et al. 2020

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Friction Stir Welding (FSW) is a solid-state joining process that uses a non-consumable tool to join two facing workpieces without melting the workpiece material. FSW is predominantly used for welding lightweight materials such as aluminum and magnesium alloys. In the present investigation, AA6061-T6 and AZ31B-H24 alloys were joined by FSW using the following parameters: rotational speed of 400, 800, 1200 and 1600 rpm, welding speed of 30 and 60 mm/min and tilt angle of 1° and 3°. In some cases, a tool offset of 1 mm was used into the Mg-based alloy. Microstructural characteristics of the weld joints were analyzed by optical microscopy and scanning electron microscopy. The experimental results show that dissimilar welds can be obtained by placing the AA6061-T6 alloy on the advancing side under two processing conditions: i) without a tool offset using a welding speed of 30 mm/min, a rotational speed of 400 rpm and a tilt angle of 1° (M7) and ii) with a tool offset and a welding speed of 30 mm/min, using a rotational speed of 1200 rpm and a tilt angle of 3° (M3). Al3Mg2 and Al12Mg17 intermetallic compounds were observed in the stir zone. Hardness and tensile strength of joints M7 varied from 76 to 129 HV, and 88.2 MPa respectively, and these properties varied from 95 to 153 HV, and 18.95 MPa in joints M3.

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“…The result was reduction in the grain size and aluminum matrix strengthened the SiC particles. Dorbane et al [3] investigated mechanical, microstructural and fracture properties of dissimilar welds produced by friction stir welding of AZ31B and AA 6061. Lakshminarayanan et al [4] studied the characteristics of friction welded AZ31B magnesium with commercial pure titanium dissimilar joints.…”

Section: Introductionmentioning

confidence: 99%

Investigations on force generation and joint properties of dissimilar thickness friction stir corner welded AA 5086 alloy

Krishnan

Subramaniam

2020

Eng. rev. (Online)

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The force generation, joint mechanical and metallurgical properties of friction stir corner welded non-heat treatable AA 5086 aluminum alloy are investigated in this paper. The friction stir welding process is carried out with the plate thicknesses of 6 mm and 4 mm. The welding speed, tool rotational speed and tool plunge depth were considered as the process parameters to conduct the welding experiments. The machine spindle motor current consumption and tool down force generation during friction stir welding were analyzed. The microstructures of various joint regions were observed. The tensile samples revealed the tensile strength of 197 MPa with tool rotational and welding speeds of 1,000 rev/min and 150 mm/min respectively, which is 78 % of parent material tensile strength. A maximum micro hardness of 98 HV was observed at thermomechanically joint affected zone, which was welded with tool rotation of 1,000 rev/min and welding speed of 190 mm/min.

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Mechanical, microstructural and fracture properties of dissimilar welds produced by friction stir welding of AZ31B and Al6061

Cited by 113 publications

References 44 publications

Effect of pin profiles on the mechanical properties of friction-stir-welded AA5383 and AA7075

Effect of pin profiles on the mechanical properties of friction-stir-welded AA5383 and AA7075

Friction Stir Welding of Dissimilar AA6061-T6 to AZ31B-H24 Alloys

Investigations on force generation and joint properties of dissimilar thickness friction stir corner welded AA 5086 alloy

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