Friction stir welding of dissimilar joint of aluminum alloy 5083 and commercially pure titanium

Sadeghi-Ghogheri, M.; Kasiri‐Asgarani, Masoud; Amini, Kamran

doi:10.4149/km_2016_1_71

Cited by 14 publications

(3 citation statements)

References 20 publications

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“…e obtained hardness value of the weld joints is decreased when moved away from their center [11]. Better hardness values were obtained in the nugget zone more than other zones affected by the welding process [12]. e FSW tool features like shoulder diameter and taper pin profile are instrumental in producing adequate weld surface quality and better mechanical behaviors of sound weld joints [13].…”

Section: Introductionmentioning

confidence: 99%

Microstructural and Mechanical Behaviors of Friction Stir Welded Dissimilar AA6082‐AA7075 Joints

Sezhian¹,

Giridharan²,

Pushpanathan³

et al. 2021

Advances in Materials Science and Engineering

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In this research, microstructural events and mechanical behaviors in dissimilar friction stir welding (FSW) of aluminium (Al) alloy AA6082-AA7075 joints have been evaluated to apply aerospace, defense, and military sectors. FSW parametric effects have a more significant impact on the mechanical performances and microstructure of produced joints. FSW tool rotational speed, welding speed, and tool plunge speed were chosen to make the weld joints. The rotational tool speeds of 1600 rpm and 2300 rpm, welding speeds of 40 mm/min and 60 mm/min, and tool plunge speeds of 20 mm/min and 30 mm/min were set as the upper and lower limits. A constant axial force of 5 kN was maintained throughout the joint fabrication process. A taper pin-profiled tool was utilized to produce the butt welded joints. Mechanical properties of microhardness, tensile strength, yield strength, elongation, and bending strength of the joints were analyzed. The response of the stir zone microstructure to processing parameters was evaluated using optical microscopy (OM) and fractographic analysis of a tensile specimen shown by scanning electron microscope (SEM). The weld joints produced at 2300 rpm, tool traveling rate of 40 mm/min, and tool plunge speed of 30 mm/min showed the greatest tensile strength of the 191 MPa hardness of 145 Hv at the weld center and also the maximum bending strength of 114.23 N/mm2 was achieved. The lowest bending strength of 25.38 N/mm2 was obtained at 1600 rpm with 60 mm/min due to inappropriate mixing of the base metals and poor joint quality. Furthermore, this study revealed that a higher tool plunge speed facilitates the formation of equiaxed grains in the thermomechanically affected zone (TMAZ) on the advancing side (AS). Additionally, the increment in tool rotational speed significantly improved the tensile strength, weld joint quality, and joint efficiency.

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Section: Introductionmentioning

confidence: 99%

Microstructural and Mechanical Behaviors of Friction Stir Welded Dissimilar AA6082‐AA7075 Joints

Sezhian¹,

Giridharan²,

Pushpanathan³

et al. 2021

Advances in Materials Science and Engineering

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“…Recently, the investigation on the welding of Metal matrix composite materials [16,17], polymer matrix composite material [18][19][20], polymers [21] etc., have been focused. Few researchers have attempted to study the weld characteristics of FSW of different grades of the same material like AA2024-T3 and *Corresponding Author's Email: ethiraj.mech@drmgrdu.ac.in (N. Ethiraj) AA5754-H22 [22], dissimilar materials joint like aluminum-magnesium [23], aluminum-stainless steel [24], aluminum-titanium [25] etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of Tool Rotational Speed on the Tensile and Microstructural Properties of Friction Stir Welded Different Grades of Stainless Steel Joints

Ethiraj

Sivabalan

Beena

et al. 2020

IJE

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Friction stir welding is a relatively new solid state joining process, which is suitable for welding similar and dissimilar materials. The present research work concentrates on the effect of tool rotational speed on the tensile, microstructural properties and microhardness of the friction stir welded joints of different grades of austenitic stainless steel sheets. Four different tool rotational speeds are used in the experimentation while the other process parameters like traversing speed and the tool tilt angle are kept constant. The tensile testing, micrography and microhardness measurements were carried out in the welded samples. It is observed from the results of tensile testing that the joint made at the tool rotational speed of 1320 rpm has the maximum strength among the experimented speeds. The measured microhardness values at heat affected zone and parent metal zone have shown higher hardness than the weld zone. Fine and equi-axed grains are observed in the welded region at all experimented speeds with a negligible amount of transformation of austenite into martensite. These results have impact on the development of welding procedure for dissimilar stainless steel friction stir welding process.

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“…Sadeghi et al [27] studied butt joints between aluminium 5083 and commercially pure titanium dissimilar alloys friction stir welded at a rotation speed of 50 mmmin -1 and a traverse speed of 1120 mmmin -1 . The hardness of the weld area was 480 HV, which was due to the presence of the interphase compounds of aluminium and titanium.…”

Section: Introductionmentioning

confidence: 99%

Friction Stir Welding of Dissimilar Joints Between Commercially Pure Titanium Alloy and 7075 Aluminium Alloy

2017

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SummaryIn this study, a joint between commercially pure titanium alloy and 7075 aluminium alloy was butt welded by using friction stir welding at a rotational speed of 1120 rpm and a traverse speed of 50 mmmin -1 . The evaluation of hardness and microstructure was performed by using scanning electron microscopy. The phases in the weld area were identified by applying the X-ray diffraction technique and the Energy Dispersive X-ray Spectroscopy (EDS) analysis was used for the evaluation of intermetallic compounds of the weld area. The weld zone is cone-shaped and consists of aluminium and titanium particles that play an important role in increasing hardness and tensile strength. The weld area has three zones, namely the titanium base metal zone, the aluminium base metal zone, and the titanium-aluminium intermetallic compound mixed zone. It was also observed that the joint area on the aluminium side includes the stirred area, the thermo-mechanically affected zone, and the heat-affected zone, while the titanium joint area contains the stirred zone and the heat-affected zone. The hardness value of the weld area was around 360 HV, which means that in this area, compared to the base metal of titanium and aluminium, hardness has increased by 6% and 20%, respectively. This can be attributed to severe plastic deformation and formation of intermetallic compounds of titanium and aluminium in this area.

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Friction stir welding of dissimilar joint of aluminum alloy 5083 and commercially pure titanium

Cited by 14 publications

References 20 publications

Microstructural and Mechanical Behaviors of Friction Stir Welded Dissimilar AA6082‐AA7075 Joints

Microstructural and Mechanical Behaviors of Friction Stir Welded Dissimilar AA6082‐AA7075 Joints

Effect of Tool Rotational Speed on the Tensile and Microstructural Properties of Friction Stir Welded Different Grades of Stainless Steel Joints

Friction Stir Welding of Dissimilar Joints Between Commercially Pure Titanium Alloy and 7075 Aluminium Alloy

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