INTERNATIONAL RESEARCH JOURNAL OF ENGINEERING AND TECHNOLOGY (IRJET) MECHANICAL AND WEAR PROPERTIES OF FRICTION STIR WELDING OF ALUMINIUM ALLOYS
INTERNATIONAL RESEARCH JOURNAL OF ENGINEERING AND TECHNOLOGY (IRJET) MECHANICAL AND WEAR PROPERTIES OF FRICTION STIR WELDING OF ALUMINIUM ALLOYS
2020, IRJET
The welding is the process of joining similar metals and dissimilar metals by melting the material with or without the use of filler material. Aluminum alloys are the major applications in welding process like aerospace industries, ship building industries. Friction stir welding is a novel technique for production of joints in solid state. The various process parameters are spindle speed, feed, load and geometry of the tool. The joining of similar Aluminum Alloys was carried out using friction stir welding (FSW) techniques are rotational speed, transverse speed, tool geometry. In this process aluminum alloy butt joint are prepared using Friction stir welding with varying process parameters are rotation speed, transverse speed by keeping constant load and tool geometry. The mechanical properties such as tensile strength, hardness and impact strength were evaluated. The microstructures of joints were analyzed using optical microscope and scanning electron microscope. The wear properties were also analyzed using pin and disk apparatus.
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Influence of Welding parameters on Mechanical property during Friction Stir Welded joint on Aluminium Alloys: A Review2023 •
2020 •
The welding is the process of joining similar metals and dissimilar metals by melting the material with or without the use of filler material. Aluminum alloys are the major applications in welding process like aerospace industries, ship building industries. Friction stir welding is a novel technique for production of joints in solid state. The various process parameters are spindle speed, feed, load and geometry of the tool. The joining of similar Aluminum Alloys was carried out using friction stir welding (FSW) techniques are rotational speed, transverse speed, tool geometry. In this process aluminum alloy butt joint are prepared using Friction stir welding with varying process parameters are rotation speed, transverse speed by keeping constant load and tool geometry. The mechanical properties such as tensile strength, hardness and impact strength were evaluated. The microstructures of joints were analyzed using optical microscope and scanning electron microscope. The corrosion properties were also analyzed by using salt spray corrosion test
2018 •
Friction stir welding process is and advanced welding technique that is offering numerous advantages when compared with the conventional welding techniques reported in the literature. The advantages in brief are 1. Weld quality is good 2. Less power consumption 3. No flux and No filler material et. Keeping in view of its advantages and considering its growing increase in the usage of FSW process in various automobile and aerospace industries, this FSW process is taken as the research work. This paper reports the experimental investigations on the effects of process parameters i.e. tool rotational speed, weld speed and tilt angle on the responses i.e tensile strength, impact strength & elongation in dissimilar welding of Aluminum alloys of different grades using the solid state welding technique Friction Stir Welding process. In view of the costlier process, Taguchi L9 is used for carrying out the research. As it is a complex process, to identify the significant variables, initial tr...
Aluminium alloy has gathered wide acceptance in the fabrication of light weight structures requiring a high strength to weight ratio. Compared to the fusion welding processes that are routinely used for joining aluminium alloys, Friction Stir Welding (FSW) process is an emerging solid state joining process in which the material that is being welded does not melt and recast. Friction Stir Welding is the most remarkable welding technology that has been invented and developed in last two decades. This process uses a non-consumable tool to generate frictional heat in the abutting surfaces. The welding parameters such as tool shoulder diameter, tool rotational speed, welding speed, axial force play a major role in deciding the joint strength. In presen study an attempt has been made to develop a mathematical model to predict tensile strength of the friction stir welded AA8011 aluminium alloy by incorporating FSW process parameters. Four factors, five levels central composite design has been used to minimize number of experimental conditions.
Current Trends in Technology and Science
Study of Mechanical Properties Change During Friction Stir Spot Welding of Aluminium AlloysThe Friction Stir Welding process is now 20 years old and the interest in it and its potential continues to increase dramatically. FSW can be applied to a multitude of products with varying material types and thicknesses. However, a continuous weld is not always required to meet the product performance requirements. Thus, one can consider some form of intermittent weld, such as Friction Stir Spot Welding. Friction Stir Spot Welding (FSSW) can be considered for many of the applications presently performed with traditional resistance spot welding (RSW), the basic concept of FSSW is remarkably simple. A non-consumable rotating tool with a specially designed pin and shoulder is inserted into the abutting edges of sheets or plates to be joined the tool serves two primary functions: (a) heating of work-piece, and (b) movement of material around pin to produce the joint. The heating is accomplished by friction between the tool and the work-piece and plastic deformation of work piece. The localized heating softens the material around the pin and combination of tool rotation and axial load. As a result of this process a joint is produced in ‘solid state’. From using this method to perform the Welding tests were performed using two welding parameters and the welds were sectioned and evaluated using optical microscopy. Mechanical testing of the spot joints was performed utilizing the tension-shear configuration. And also evaluate the hardness on the weld spot at the different zone nugget, TMAZ, HAZ and Base plate.
Friction stir welding was invented at Welding institute, United Kingdom in the year 1991 and has ever since been proved to be one of the best solid state joining methods for materials such as aluminium and magnesium. Some of the aluminium alloys which are not weld able (Al-Cu, Al-Zn-Mg alloy) by fusion welding techniques, which produce defects and reduce the mechanical properties on the weld nugget could be welded using friction stir welding (FSW) successfully with excellent joint efficiencies. However effect of the process parameters on the properties of weld have not been investigated fully. In this study friction stir welding of aluminium alloys is selected for investigation. The welding process are to be conducted on varying the welding process parameters such as Tool rotation speed (RPM), Welding speed (mm/min), Downward force (KN) and Tool pin profile. The properties such as defects, microstructure, hardness, tensile and bend behaviour on welded plates are to be studied and compared with the base metal. Based on the results the process parameters are to be optimized.
The combination of wrought aluminum-magnesium-silicon alloy confirming to aluminum AA6061 alloy widely accepted because of light weight fabrication structures, high strength to weight ratio and good corrosion resistance. Friction Stir Welding(FSW) process is an emerging solid state joining process in which the material that is being welded does not melt and recast when compared to fusion welding process that are routinely used for joining structural aluminum alloys. In this FSW process a non consumable tool is used to generate frictional heat in the abutting surfaces. Experiments for surface roughness, Rockwell hardness and tensile tests are carried out and reported in this paper. The base material used for friction stir welding is aluminum AA 6061 alloy. Surface roughness values decreases with the increase in speed of the tool and also there exists an optimum speed to have the good surface finish. Hardness increases with decrease in speed of the tool but increases after reaching a certain value. Tensile strength increases with the increase in speed of the tool and also there exists an optimum values for particular feed of the tool.
Aluminium alloys have a wide range of application in many industries like aerospace, defence, marine etc. Friction Stir Welding (FSW) can produce low cost and high quality joints of aluminium alloys because it does not need consumable filler materials and can eliminate some welding defects such as crack and porosity. The most important contributing factors for mechanical properties are Tool rotational speed and Tool feed followed by Shoulder diameter and Pin depth. In this paper a little concentration is paid to study the effect of rotational speed and feed rate on properties of FSW weldments. Aluminium plates of Standard thickness (6 mm) were butt welded on single side by friction stir welding (FSW) process under various traversing speeds and rotational speeds. The effects on mechanical properties like hardness and tensile strength of the welded region were studied. Reduction of hardness by an amount of 7.8% at higher welding speed might have increased the tensile strength by an amount of 45%.