scholarly journals Influence of Welding Speed on Fracture Toughness of Friction Stir Welded AA2024-T351 Joints

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1561
Author(s):  
Miodrag Milčić ◽  
Dragan Milčić ◽  
Tomaž Vuherer ◽  
Ljubica Radović ◽  
Igor Radisavljević ◽  
...  
Keyword(s):  
Friction Stir Welding ◽  
Welding Speed ◽  
Fracture Behavior ◽  
Welded Joint ◽  
Rotation Speed ◽  
High Reliability ◽  
Welding Parameters ◽  
Friction Stir ◽  
Tool Rotation Speed ◽  
Tool Rotation

In order to ensure a quality welded joint, and thus safe operation and high reliability of the welded part or structure achieved by friction stir welding, it is necessary to select the optimal welding parameters. The parameters of friction stir welding significantly affect the structure of the welded joint, and thus the mechanical properties of the welded joint. Investigation of the influence of friction stir welding parameters was performed on 6-mm thick plates of aluminum alloy AA2024 T351. The quality of the welded joint is predominantly influenced by the tool rotation speed n and the welding speed v. In this research, constant tool rotation speed was adopted n = 750 rpm, and the welding speed was varied (v = 73, 116 and 150 mm/min). By the visual method and radiographic examination, imperfections of the face and roots of the welded specimens were not found. This paper presents the performed experimental tests of the macro and microstructure of welded joints, followed by tests of micro hardness and fracture behavior of Friction Stir Welded AA2024-T351 joints. It can be concluded that the welding speed of v = 116 mm/min is favorable with regard to the fracture behavior of the analysed FSW-joint.

Study the Role of Friction Stir Welding Tilt Angle on Microstructure and Hardness

2015 ◽  
Vol 799-800 ◽  
pp. 434-438 ◽  
Author(s):  
H.A.D. Hamid ◽  
A.A. Roslee
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Tilt Angle ◽  
Welding Speed ◽  
Rotation Speed ◽  
Welding Parameters ◽  
Friction Stir ◽  
Tool Rotation Speed ◽  
Tool Pin ◽  
Tool Rotation

This paper presents an investigation of research objectives on the effect of tilt angle on microstructure and mechanical properties of dissimilar aluminum alloy sheets between AA5083 and AA6061, 5mm plates by using Friction Stir Welding (FSW) process in butt joint. The base materials of AA5083 and AA6061 were located on the retreating side (RS) and advancing side (AS), respectively. The welding process and the welding parameters such as tool pin profile, tool rotation speed, welding speed and tilt angle influenced the mechanical properties of the Friction Stir Welding joints significantly. For this experiment, the Friction Stir Welding materials joined under five different tilt angles (from 0oto 4o) with 86mm/min of welding speed and 910 rpm of tool rotation speed which were set similarly. Microscopic examination on the weld samples showed significant variation in the microstructure especially in the region of heat-affected zone (HAZ), weld nugget or dynamically recrystallized zone (DXZ) and in the base metal.

Effect of welding parameters on mechanical properties and microstructure of friction stir welded brass joints

2018 ◽  
Vol 106 (6) ◽  
pp. 606 ◽  
Author(s):  
İnan Geçmen ◽  
Zarif Çatalgöl ◽  
Mustafa Kemal Bilici
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Rotation Speed ◽  
Stir Zone ◽  
Weld Strength ◽  
Welding Parameters ◽  
Feed Speed ◽  
Friction Stir ◽  
Tool Rotation Speed ◽  
Tool Rotation

Friction stir welding is a method developed for the welding of high-alloy aluminum materials which are difficult to combine with conventional welding methods. Friction stir welding of MS 63 (brass) plates used different tools (tapered cylindrical, tapered threaded cylindrical), tool rotational speeds (1040, 1500, 2080 rpm) and traverse speeds (30,45,75,113 mm.min−1). Tensile, bending, radiography and microstructure tests were carried out to determine the mechanical properties of brass plates joined by friction stir welding technique. Microstructure characterization studies were based on optical microscope and SEM analysis techniques. In addition, after joining operations, radiographs were taken to see the internal structure failure. Brass sheets were successfully joined to the forehead in the macrostructure study. In the evaluation of the microstructure, it was determined that there were four regions of base metal, thermomechanically affected zone (TMEB), heat-affected zone (HAZ) and stir zone. In both welding tools, the weld strength increased with increasing tool rotation speed. The particles in the stir zone are reduced by increasing of the tool rotation speed. Given the strength and % elongation values, the highest weld strength was achieved with tapered pin tool with a tool rotation speed of 1040 rpm and a tool feed speed of 113 min−1.

Investigation on Friction Stir Welding Parameters of Aluminium Metal Matrix Composites

2019 ◽  
Vol 11 (2) ◽  
Author(s):  
M. Sucharitha ◽  
B. Ravisankar
Keyword(s):  
Friction Stir Welding ◽  
Metal Matrix ◽  
Rotation Speed ◽  
Friction Stir Weld ◽  
Welding Parameters ◽  
Friction Stir ◽  
Tool Rotation Speed ◽  
Wide Range ◽  
Tool Rotation ◽  
Aluminium Metal

Friction stir welding could be a solid-state welding has a wide range of applications in industries like aerospace and automobile industries. In this work, the friction stir weld ability of aluminium metal matrix composite(AMMC) using H13 tool and sensitivity of parameters like tool rotation speed, traverse speed and axial force are assessed on final durability, hardness and microstructure. It was observed that the tensile strength and hardness are increased by increasing the tool rotation speed. The microstructure showed fine Al-Mg-Si eutectic particles in a matrix of Al solid solution.

Microstructure and Mechanical Properties of Friction Stir Welded Annealed Pure Copper Joints

2013 ◽  
Vol 787 ◽  
pp. 346-351
Author(s):  
Salar Salahi ◽  
Vahid Rezazadeh ◽  
Atabak Iranizad ◽  
Ali Hosseinzadeh ◽  
Amir Safari
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Welding Speed ◽  
Heat Input ◽  
Applied Load ◽  
Rotation Speed ◽  
Pure Copper ◽  
Friction Stir ◽  
Tool Rotation Speed ◽  
Tool Rotation

As a novel technique for joining materials, friction stir welding (FSW) has significant advantages over the conventional welding methods and is widely applied for joining different materials including aluminum, magnesium and copper alloys. In this research, the mechanical and microstructural characteristics of friction stir welded annealed pure copper joints were investigated. The influence of the tool rotation speed, welding speed and applied load was studied. The friction stir welding (FSW) was conducted at welding speed ranged from 30 to 70 mm/ min, rotation speed ranged from 400 to 1200rpm and applied load ranged from 1000 to 1500 kg. After welding process, tensile and Vickers hardness tests were performed. It has been found that increasing the tool rotational speed and/or reducing the welding speed increases heat input and causes grain coarsening in stir zone. High applied load refines the microstructure of NZ and increases the hardness and tensile strength of NZ. An optimum heat input condition was found to reach the best mechanical properties of the joints. The tensile characteristics of the friction stir welded tensile samples depend significantly on the tool rotation speed ,welding speed and applied load.

Dissimilar Materials Joining between SSM 356-T6 and AA6061-T651 by Friction Stir Welding

2013 ◽  
Vol 372 ◽  
pp. 478-485 ◽  
Author(s):  
Chaiyoot Meengam ◽  
Muhamad Tehyo ◽  
Prapas Muangjunburee ◽  
Jessada Wannasin
Keyword(s):  
Tensile Strength ◽  
Friction Stir Welding ◽  
Welding Speed ◽  
Rotation Speed ◽  
Stir Zone ◽  
Weld Nugget ◽  
Friction Stir ◽  
Tool Rotation Speed ◽  
Base Materials ◽  
Tool Rotation

The aim of this research is to study the influence of welding parameters on the metallurgical and mechanical properties of friction stir welded butt joints of dissimilar aluminum alloy sheets between Semi-Solid Metal (SSM) 356-T6 and AA6061-T651 by Friction Stir Welding (FSW). The base materials of SSM 356-T6 and AA6061-T651 were located on the advancing side (AS) and on the retreating side (RS) respectively. The base materials were joined under different tool rotation speeds and welding speeds. The material flows from SSM 356 and AA6061-T651 were clearly visible in the weld nugget. In addition, the mixtures of fine equiaxed grain were observed in the stir zone. The increase in tool rotation speed results in the increase in tensile strength of the joints. As for welding speed associated with various tool rotation speeds, an increase in the welding speed affected lesser the base materials tensile strength up to an optimum value; after which its effect increased. Tensile elongation was generally greater at greater tool rotation speed. An averaged maximum tensile strength of 206.3 MPa was derived for a welded specimen produced at the tool rotation speed of 2,000 rpm associated with the welding speed of 80 mm/min. In the weld nugget, higher hardness was observed in the stir zone than in the thermo-mechanically affected zone. Away from the weld nugget, hardness levels increased back to the levels of the base materials.

scholarly journals STUDY OF EFFECT OF FRICTION STIR WELDING PARAMETERS ON IMPACT ENERGY OF AA7075-T6

2016 ◽  
Vol 54 (1) ◽  
pp. 99
Author(s):  
Duong Dinh Hao ◽  
Tran Hung Tra ◽  
Vu Cong Hoa
Keyword(s):  
Friction Stir Welding ◽  
Temperature Distribution ◽  
Impact Energy ◽  
Welding Speed ◽  
Rotation Speed ◽  
Welding Parameters ◽  
Friction Stir ◽  
Notched Specimens ◽  
The Impact ◽  
Tool Rotation

The influences of the tool rotation speed (denoted w) and the welding speed (denoted v) on the impact energy at the representative zones in the friction stir welding (FSW) of AA7075-T6 were investigated. Here, the standard V–Notched specimens were applied in which the notches were addressed at the stirred zone (SZ), the heat affected zones (HAZ) in both the advancing side and the retreating side and the mixed zone (MZ). The experimental results showed that, in all cases, the lowest impact energy is located at the stirred zone and that energy seems to be increased from the SZ to the HAZ across the welding. Furthermore, it is also found that the impact energy is decreased when the ratio of rotation speed to welding speed (w/v) is increased. The microstructure, the temperature distribution, and the hardness in and around the welded zone were considered and discussed.

scholarly journals The influence of welding parameters on macrostructure and mechanical properties of Sc-modified AA2519-T62 FSW joints

2020 ◽  
Vol 7 ◽  
pp. 28
Author(s):  
Robert Kosturek ◽  
Lucjan Śnieżek ◽  
Janusz Torzewski ◽  
Marcin Wachowski
Keyword(s):  
Mechanical Properties ◽  
Welding Speed ◽  
Fatigue Testing ◽  
Rotation Speed ◽  
Low Cycle Fatigue ◽  
Welding Parameters ◽  
Cycle Fatigue ◽  
Friction Stir ◽  
Tool Rotation Speed ◽  
Tool Rotation

In this investigation, a 5 mm thick extrusion of AA2519-T62 alloy has been welded using friction stir welding method. The various sets of process parameters have been involved within the range of 400–1200 rpm tool rotation speed and 100–800 mm/min welding speed. Selected joints have been subjected to the macrostructure analysis, microhardness measurements, tensile and low cycle fatigue testing (at ε = 0.3%), and fractography analysis. It has been stated that imperfection-free macrostructure is obtained for welds produced with lowest welding speed: 100 mm/min and tool rotation speed within the range of 400–800 rpm. The highest joint efficiency (85%) has been obtained for the sample characterized by the presence of voids in the upper part of the stir zone. Considering macrostructure analysis and established mechanical properties of the joints, it may be concluded that the best set of welding parameters for AA2519-T62 is within the range of 600–800 rpm tool rotation speed with welding speed of 100 mm/min for used MX Triflute tool.

scholarly journals PENGARUH TOOL ROTATION SPEED TERHADAP SIFAT MEKANIK SAMBUNGAN ALUMINIUM PADUAN 6061-T6 PADA PROSES FRICTION STIR WELDING

2019 ◽  
Vol 25 (3) ◽  
Author(s):  
Tarmizi Tarmizi ◽  
Riki Indrawan ◽  
Irfan Irfan
Keyword(s):  
Friction Stir Welding ◽  
Rotation Speed ◽  
Friction Stir ◽  
Tool Rotation Speed ◽  
Tool Rotation

PENGARUH TOOL ROTATION SPEED TERHADAP SIFAT MEKANIK SAMBUNGAN ALUMINIUM PADUAN 6061 T6 PADA PROSES FRICTION STIR WELDING. Pengelasan aduk tekan merupakan proses pengelasan yang baru dikembangkan pada tahun 1991, hingga saat ini berbagai penelitian terus dilakukan untuk menemukan parameter yang dapat menghasilkan sambungan las yang optimum sebagai alternatif proses pengelasan fusi yang masih memiliki beberapa kekurangan. Penelitian ini bertujuan untuk mengetahui pengaruh kecepatan putar tool yang menjadi salah satu parameter penting dalam friction stir welding pada pelat aluminium paduan 6061-T6 dengan tebal 6 mm terhadap sifat mekanik sambungan las, dengan variasi kecepatan putar yang digunakan 910 rpm, 1175 rpm, 1555 rpm, 1700 rpm dan 2000 rpm untuk mendapatkan parameter yang optimum. Berdasarkan penelitian yang telah dilakukan didapatkan hasil bahwa sambungan las dengan kecepatan putaran 910 rpm, 1175 rpm dan 1555 rpm tidak terdapat cacat dan memenuhi kriteria sambungan las berdasarkan standar AWS D17.3 sedangkan sambungan las yang memiliki sifat mekanik yang paling optimum yaitu sambungan las dengan kecepatan putar tool 910 rpm karena pengkasaran butir dan larutnya presipitat tidak terlalu signifikan dibandingkan dengan kecepatan putaran lainnya.Kata kunci: Pengelasan aduk tekan, pengelasan fusi, kecepatan putar, tool, aluminium paduan 6061-T6.

Studies on Friction Stir Welding of AA2014, AA6082 and AA7075 Simillar and Dissimillar Joints

2020 ◽  
Vol 37 ◽  
pp. 15-24
Author(s):  
P. Gunasekaran ◽  
K.T. Thilagham ◽  
D. Noorullah
Keyword(s):  
Friction Stir Welding ◽  
Process Parameters ◽  
Tilt Angle ◽  
Welding Speed ◽  
Rotation Speed ◽  
Hardness Distribution ◽  
Dissimilar Joints ◽  
Friction Stir ◽  
Tool Profile ◽  
Tool Rotation

The joining of similar and dissimilar AA2014, AA6068 and AA7075 aluminium plates of 6mm thickness was carried out by friction stir welding (FSW) technique. FSW of Aluminium to Aluminium has caught significant consideration from assembling industries, such as Shipbuilding, Automotive, Railway and Aircraft generation. Here, the chosen process parameters are tilt angle (2º), tool rotation speed (900rpm) and transverse feed of (80mm/min) at constant axial force 2kN. An attempt was made to join the similar and dissimilar aluminium plate of 6 mm thickness with a conical tapered tool profile. Then, the effect of welding speed on microstructures, hardness distribution and tensile properties of the welded similar and dissimilar joints AA2014, AA6068 and AA7075 were investigated.

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