The joint properties of dissimilar formed Al alloys by friction stir welding according to the fixed location of materials

Friction powder processing (FPP) has been developed based on the principle of friction stir welding (FSW) or friction stir processing (FSP). The FPP is a method to design the properties of the processed area by performing FSP after powder with a controlled composition is placed in the gap between two plates. The FPP experiments were performed using a tool with the shoulder diameter of 15mm and the probe diameter of 6mm. The tool traveled at 100mm/min and rotated at 1500rpm. A1050 aluminum was used as the plate. Pure Al powder (89μm average grain diameter) and pure Cu powder (106μm average grain diameter) were used as the additives. When using pure Al powder, the pure Al powder left in the base metal after the first pass is sufficiently stirred by performing the second pass and then a good joint without defects is obtained. However, more than three passes are not effective for improving the strength of the welded area. When using pure Cu powder, nanoscale Al2Cu precipitates are uniformly formed in the stir zone, and accordingly, the hardness is significantly increased.

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Lap Joints of 6061 Al Alloys by Friction Stir Welding

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/205/1/012005 ◽

2017 ◽

Vol 205 ◽

pp. 012005

Author(s):

M. A. Tashkandi

Keyword(s):

Friction Stir Welding ◽

Lap Joints ◽

Al Alloys ◽

Friction Stir

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Friction stir welding of dissimilar Al alloys: effect of process parameters on mechanical properties

Engineering Solid Mechanics ◽

10.5267/j.esm.2016.2.001 ◽

2016 ◽

pp. 125-132 ◽

Cited By ~ 18

Author(s):

Jitender Kundu ◽

Hari Singh

Keyword(s):

Mechanical Properties ◽

Friction Stir Welding ◽

Process Parameters ◽

Al Alloys ◽

Friction Stir

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Measurement and evaluation of joint properties in friction stir welding of ABS sheets reinforced by nanosilica addition

Measurement ◽

10.1016/j.measurement.2018.05.005 ◽

2018 ◽

Vol 127 ◽

pp. 198-204 ◽

Cited By ~ 12

Author(s):

Reza Bagherian Azhiri ◽

Ramin Mehdizad Tekiyeh ◽

Ebrahim Zeynali ◽

Masoud Ahmadnia ◽

Farid Javidpour

Keyword(s):

Friction Stir Welding ◽

Friction Stir ◽

Joint Properties ◽

Measurement And Evaluation

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Effect of double-sided friction stir welding on the mechanical and microstructural characteristics of AA5754 aluminium alloy

Materials Testing ◽

10.1515/mt-2021-0009 ◽

2021 ◽

Vol 63 (9) ◽

pp. 829-835

Author(s):

Sare Çelik ◽

Fatmagül Tolun

Keyword(s):

Friction Stir Welding ◽

Al Alloys ◽

Fusion Welding ◽

Welding Parameters ◽

Al Alloy ◽

Test Results ◽

Feeding Rates ◽

Microstructural Characteristics ◽

Friction Stir ◽

Tool Tilt Angle

Abstract AA5754Al alloy is widely used in industry. However, as in the case of all Al alloys, the 5xxx series Al alloys cannot be easily joined through fusion welding techniques. To address this problem, in this study, the effect of double-sided friction stir welding at various tool rotational speeds (450, 710, and 900 rpm), feeding rates (40, 50, and 80 mm × min-1), and tool tilt angles (0°, 1°, 2°) on the welding parameters and mechanical and microstructural characteristics of AA5754 Al alloy was determined. Tensile strength tests and microhardness tests were performed to examine the mechanical properties of the welded specimens. The microstructures of the welded zone were examined by obtaining optical microscopy and scanning electron microscopy images. The tensile test results indicated that the specimens exhibited the highest welding performance of 95.17 % at a tool rotational speed, feed rate, and tool tilt angle of 450 rpm, 50 mm × min-1 and 1°, respectively.

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Friction Stir Welding Parameters: Impact of Abnormal Grain Growth during Post-Weld Heat Treatment on Mechanical Properties of Al–Mg–Si Welded Joints

Metals ◽

10.3390/met10121607 ◽

2020 ◽

Vol 10 (12) ◽

pp. 1607

Author(s):

Amir Hossein Baghdadi ◽

Zainuddin Sajuri ◽

Mohd Zaidi Omar ◽

Armin Rajabi

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Friction Stir Welding ◽

Grain Growth ◽

Precipitation Hardening ◽

Al Alloys ◽

Abnormal Grain Growth ◽

Post Weld Heat Treatment ◽

Welding Parameters ◽

Friction Stir

Friction stir welding (FSW) is an alternative method to join aluminum (Al) alloys in a solid-state condition. However, the coarsening or dissolution of precipitation hardening phases in the welding zone causes strength reduction or softening behavior in the welded area of age-hardened Al alloys. Therefore, this research aimed to improve the mechanical properties of an FSW Al–Mg–Si alloy via post-weld heat treatment (PWHT) and the possibility of controlling the abnormal grain growth (AGG) using different welding parameters. FSW was performed with different rotational and travel speeds, and T6 heat treatment was carried out on the FSW samples as the PWHT. The results showed a decrease in the strength of the FSW samples compared with that of the base material (BM) due to the dissolution of precipitation hardening particles in the heat-affected zone. However, the emergence of AGG in the microstructure after the T6-PWHT was identified as the potential event in the microstructure of the PWHT samples. It is found that the AGG of the microstructure in similar joints of Al6061(T6) was governed by the welding parameters. The results proved that PWHT was able to increase the tensile properties of the welded samples to values comparable to that of Al6061(T6)-BM. The increased mechanical properties of the FSW joints were attributed to a proper PWHT that resulted in a homogeneous distribution of the precipitation hardening phases in the welding zones.

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