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Friction stir welding (FSW) is a promising technique in which joints with high strength and minimal defects can be realized by adopting optimum process parameters. The prominent parameters are tool rotation speed, welding speed, shoulder diameter and pin diameter of the tool. In this study Mamdani fuzzy system was used to generate the model for predicting and exploring the influence of FSW process...
Conventional welding techniques like arc welding, tungsten inert gas welding (TIG), metal inert gas welding (MIG) etc.; causes health problems like bronchitis, airway irritation, lung function changes, lung fibrosis, asthma and a possible increase in the incidence of lung cancer due to the emission of exhaust gases coming from the traditional arc welding. In this context an environment friendly technique...
In this study, the mechanical properties of welded joints of AA-6082-T6 aluminium alloy obtained with friction stir welding (FSW) and conventional metal inert gas welding (MIG) were studied. FSW welds were carried out on a Friction stir welding machine. The performance of FSW and MIG welded joints were identified using tensile, metallographic and hardness tests. The joints obtained with FSW and MIG...
In this study, statistical aspects of fatigue crack growth life of base metal (BM), weld metal (WM) and heat affected zone (HAZ) in friction stir welded (FSWed) 7075–T651 aluminum alloy has been statistically analyzed by Weibull statistical analysis using our previous experimental data. The fatigue crack growth test were performed at room temperature on ASTM standard CT specimens under 3 different...
Aluminium and its alloys generally has low weldability by traditional fusion welding process. The development of the Friction Stir Welding (FSW) has provided an alternative improved way of producing aluminium joints, in a faster and reliable manner. FSW process has several advantages in particular the possibility to weld dissimilar aluminium alloys. This paper presents the mechanical and metallurgical...
The conventional fusion welding of cast aluminium alloys is generally difficult due to some common defects such as porosity, oxide inclusion, and hot cracking, which in turn reduce the weld strength. In recent years, friction stir welding (FSW) was found to be very effective for the welding of various wrought aluminum alloys. This paper investigates a metal joining process called Friction Stir Welding...
The aim of the present work is to investigate on the mechanical and micro structural properties of dissimilar 2024 and 7075 aluminium plates joined by friction stir welding (FSW). The two plates, aligned with perpendicular longitudinal directions, have been successfully welded; successively, the welded plates have been tested under tension at room temperature in order to analyse the mechanical response...
Friction stir welding is a solid state welding process which involves joining similar or dissimilar metals using a rotating tool. Tool geometry and traverse speed and rotating speed of motion of the tool, tool axial force and tilt angle are some of the variables in this process. Many materials like Aluminium alloy 2000, 6000 and 7000 series have been joined using this technique. Mechanical characterization,...
The respiratory effects often seen in full time welders include bronchitis, Airway irrigation, lung function changes, lung fibrosis and a possible increase in the incidence of lung cancer. Functionally significant pulmonary fibrosis associated with exposure to silica dust, nitrogen dioxide gas and other components of the welding fume would appear to leads to severe form of fibrosis in welders. Traditionally,...
Strain-controlled fatigue tests especially at high strain amplitudes for welded joints demand the strain sensors capable of reaching ??8000 ???? and of a size of a few millimeters. However, these sensors are not available on the market. Here we report the application of a newly-developed flat-cladding Fiber Bragg grating sensor array in the characterization of cyclic deformation behavior of friction...
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