Papers by Keyword: Friction Welding

Abstract: The friction welding method could be a solid state connection method that produces a joint within the forging force contact of revolving and stationary workpiece. The solid state connection method, it produces welds with reduced distortion and improved mechanical properties. The austenitic stainless steels are wide employed in completely different industrial applications like building, nuclear trade and automobile industries owing to their special mechanical and metallurgical properties. During this work, friction welding of austenitic stainless-steel rods of 10mm diameter was investigated with an aim to grasp the sensitivity of friction attachment method parameters. The details of microstructure analysis using optical microscopy are discussed.

Abstract: In this research work, friction welding (FW) of AISI 1020 grade carbon steel rods of 12 mm diameter was investigated with an aim to develop the empirical relationship to predict the minimum micro hardness for the process parameters. Welds are made with various process parameter combinations using ANOVA design matrix which were subjected to Vickers hardness tests. A microstructure analyses was carried out to acquire the joint efficiency. The heat affected zone of the microstructure has been shown for the optimized condition.Keywords:-Friction welding, AISI 1020 grade carbon steel, empirical relationship, Grain structure, Micro hardness.

Abstract: Friction welding is widely used in determining the mass production process for joining dissimilar materials due to its environment friendliness, production efficiency and low heat input. In this study, Taguchi approach was applied in grey relational analysis to solve the multi-response optimization. The experimental result analysis is to achieve the maximization of tensile strength and minimization of weld time and metal loss. The optimal combinations of welding parameters are predicted through grey relational analysis for the multi-performance and optimal results were verified through confirmation test.

Abstract: Rotary Friction welding is a process of solid state joining, broadly in shaft and pipe weld, in the field of automobile, defence, aeronautical, chemical and nuclear environment assembly pipe lines. Due to its some distinctive advantages similar to ease of fabricate, environmentally sociable, high fabrication value and appropriate for similar, dissimilar metal joint. Now a day’s Titanium alloy and stainless steel materials are very popular material in industrial application due to its high mechanical potency, and non-corrosive in nature. In this study an attempt was made to join commercial rod of Ti-6Al-4V and Stainless steel304L with some methods and evaluates the joint strength. Different intermediate metals are taking on in this process and the outcomes are witnesses. From that study the best method of in-between metal was analyzed by carry out mechanical and metallurgical test.

Abstract: Friction welding is a solid state process used mostly for joining dissimilar materials due to mass production with less time consuming. The aim of this work is to study the dissimilar joints of austenitic stainless steel and copper for evaluating the impact strength. The experiment is conducted by using Taguchi’s L₉ orthogonal array for determining the value of impact strength. The input parameters such as friction pressure, upset pressure, rotational speed and burn-off length were considered and the optimum process parameter was determined based on the response of impact strength. The predicted value of impact strength was validated by conducting the confirmation run using optimum parameters. The analysis of variance (ANOVA) is conducted for the mean of impact strength.

Abstract: The subject of this paper was the presentation of a holistic, fully-temperature-coupled FE model of inertia friction welding based on the modified friction law, which divided the friction welding process into beginning friction stage and steady equilibrium friction stage. At each of the stage Coulomb friction model and shear friction model were adopted respectively. The present FE model predicted the temperature of the welding joint as well as variation of friction torque and relative rotating velocity of the work-piece during the welding process. The evolution of friction torque and rotating velocity were compared with the experimental measurement. They showed a good agreement between them.

Abstract: Parts having a strength distribution were produced from tailor friction-welded billets consisting of steel bars having different quenchabilities. Chrome steel SCr420 and mild steel S25C bars having high and low quenchabilities, respectively, were joined by friction welding. The tailor friction-welded billets were forged, and then quenched so as to have a strength distribution. The cold formability of the tailored billet was first examined from simple compression in the normal and tangential directions to the joint. No cracks appeared even for an 80% reduction in height in the compression. In a tensile test of the 80% reduced billet, the softer S25C side was fractured and the interface was not fractured. The tailor billets have enough cold formability. The thermal influence around the joint of the tailor friction-welded billets was eliminated by annealing, and thus inhomogeneous deformation around the joint in forging was prevented. A shaft having a high strength flange and a connecting rod having high strength and machinability were produced by forging and quenching of the tailored billet.

Abstract: EN24 steel is widely used in many engineering applications such as shaft, axle and fasteners due to high tensile strength and low cost. Friction welding is generally used to join the similar and dissimilar materials. The present work investigates on the mechanical properties of friction welded EN 24 steel joints. The effects of the four main parameters: friction duration, forging time, friction pressure and forging pressure on the mechanical properties of the weld such as hardness and axial shortening are studied experimentally and analyzed using ANOVA statistics.

Abstract: The solid-state joining process produces welds with improved mechanical properties and reduced distortion. Higher Carbon Steels are extensively used in different industrial applications such as shipbuilding and automobile industries due to their superior mechanical properties. In this work, friction welding of high carbon steel of Φ12mm dia extruded rod was studied with a plan to analysis the hardness behavior on the weldment. Welds are made with a high and low level range of process parameter combinations (incorporating ANOVA methods) which were subjected to Vickers Hardness tests. The Vickers Hardness of the welded joints has been reported.

Abstract: Friction welding is a solid state joining technique used for joining similar and dissimilar materials with high integrity. This new technique is being successfully applied to the aerospace, automobile, and ship building industries, and is attracting more and more research interest. Owing to the significance, thermal analysis on friction stud welding of mild steel and aluminium combination is carried out in the present work. In this study the temperature profiles at different locations are predicted mathematically by using one dimensional finite element method.