scholarly journals A Metallurgic and Mechanical Differentiation to Friction Stir Welding (FSW)

2019 ◽  
Vol 9 (1) ◽  
pp. 4912-4915
Keyword(s):  
Friction Stir Welding ◽  
Temperature Distribution ◽  
Cross Sections ◽  
Welding Parameters ◽  
Friction Stir ◽  
Steady State Model ◽  
Weld Root ◽  
Crossing Point ◽  
Mechanical Differentiation ◽  
Root Properties

The objective of this research was to measure the material properties as well as the forces to orthodox friction stir welding (FSW) performed in air of AA6061. These results were compared by using ultimate tensile strength (UTS) and weld root properties such as joint line residue length at the crossing point between the welded aluminum alloy which allows crack initiation. Metallurgic cross sections of the AA6061 welds were prepared and the weld nugget hardness between the welding parameters was compared as well. Experiments such as this one and others enumerating the forces and process parameters must be achieved. A steady state model of temperature distribution has been put forward and is shown to precisely forecast trends in heat input using heat generation equations from [1,2]. Temperature distribution was measured and correlated to data by use of Micron Thermal Imaging camera.

Experiment and Simulation of Influence of Welding Parameters on Temperature in Friction Stir Welding

2010 ◽  
Vol 44-47 ◽  
pp. 76-80
Author(s):  
Lei Wang ◽  
Jian Jun Zhu
Keyword(s):  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Temperature Distribution ◽  
Welding Process ◽  
Welding Parameters ◽  
Fem Model ◽  
Friction Stir ◽  
Model Of Friction ◽  
Welding Technique ◽  
Good Agreement

Temperature distribution is the foundation to study friction stir welding technique, influence of welding parameters on temperature was studied through experiment measurement on AA2024-T4 aluminum alloy plates. An instantaneous relative linear velocity based heat source was utilized to build the FEM model of friction stir welding process, good agreement was observed between the measured and simulated thermal profiles. FEM model was also utilized to study effect of welding parameters on temperature distribution.

Temperature Distribution Analysis in Plates Joined by Friction Stir Welding

2009 ◽  
Author(s):  
Mauricio Rangel Pacheco ◽  
Jean Paul Kabche ◽  
Ivan Thesi ◽  
Fabiano Nunes Diesel
Keyword(s):  
Finite Element ◽  
Friction Stir Welding ◽  
Temperature Distribution ◽  
Large Scale ◽  
Heat Dissipation ◽  
Welding Process ◽  
Experimental Investigations ◽  
Welding Parameters ◽  
Distribution Analysis ◽  
Friction Stir

Friction Stir Welding (FSW) is a solid-state welding process which generates heat through mechanical friction between a moving workpiece and a fixed component, in order to plastically combine materials. This process has been gaining considerable attention due to several key advantages, which include: good mechanical properties of the combined materials after welding, absence of toxic fumes and molten material spatter, low environmental impact, and low concentration of defects while allowing a large variation of parameters and materials. Although a reasonable number of experimental investigations on FSW are available in the literature, numerical modeling of this process has not been performed on a large scale. In that light, this paper presents a numerical investigation of the temperature distribution in plates welded by FSW, using finite element analysis. The finite element model developed includes friction between the workpiece and the fixed component, as well as the corresponding heat dissipation that results from plastic deformation of the material. The model was found appropriate for estimating important welding characteristics, such as the heat-affected zone (HAZ), and their sensitivity to various welding parameters.

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.

Analysis of the Temperature Distribution in Friction Stir Welding Using the Finite Element Method

2013 ◽  
Vol 758 ◽  
pp. 11-19 ◽  
Author(s):  
Mauricio Rangel Pacheco ◽  
Pedro Manuel Calas Lopes Pacheco
Keyword(s):  
Finite Element ◽  
Friction Stir Welding ◽  
Temperature Distribution ◽  
Plastic Strain ◽  
Heat Source ◽  
Translational Motion ◽  
Welding Process ◽  
Welding Parameters ◽  
Friction Stir ◽  
Welding Processes

Welding is a fabrication process widely used in several industrial areas. The welding of metallic alloys presents some basic characteristics as the presence of a localized intensive heat input that promotes mechanical and metallurgical changes. Different from conventional welding processes, where macroscopic fusion is observed, friction welding is a solid state welding process where the joint is produced by the relative rotational and/or translational motion of two pieces under the action of compressive forces producing heat and plastic strain on the friction surfaces. Friction Stir Welding (FSW) process has received much attention for its special characteristics, like the high quality of the joints. Although there are several experimental works on the subject, numerical modeling is not well stated, as the process is very complex involving the coupling of several non-linear phenomena. In this contribution a tridimensional finite element model is presented to study the temperature distribution in plates welded by the FSW process. A weld heat source is proposed to represent the heat generated during the process. The heat source model considers several contributions present in the process as the friction between the tool and the piece and the plastic power associated to the plastic strain developed. Numerical results show that the model is in close agreement with experimental results, indicating that the model is capable of capturing the main characteristics of the process. The proposed model can be used to predict important process characteristics, like the TAZ (Thermal Affected Zone), as a function of the welding parameters.

Optimization of friction stir welding parameters of dissimilar aluminium alloys 6061 and 5083 by using response surface methodology

2021 ◽  
pp. 095440622110058
Author(s):  
Sanjeev Verma ◽  
Vinod Kumar
Keyword(s):  
Tensile Strength ◽  
Friction Stir Welding ◽  
Tilt Angle ◽  
Feed Rate ◽  
Aluminium Alloys ◽  
Welded Joint ◽  
Welding Parameters ◽  
Friction Stir ◽  
Industrial Sectors ◽  
Tool Pin

Aluminium and its alloys are lightweight, corrosion-resistant, affordable and high-strength material and find wide applications in shipbuilding, automotive, constructions, aerospace and other industrial sectors. In applications like aerospace, marine and automotive industries, there is a need to join components made of different aluminium alloys, viz. AA6061 and AA5083. In this study friction stir welding (FSW) is used to join dissimilar plates made of AA6061-T6 and AA5083-O. The effect of varying tool pin profile, tool rotation speed, tool feed rate and tilt angle of the tool has been investigated on the tensile strength and percentage elongation of the welded joints. Box-Behkan design, with four input parameters and three levels of each parameter has been employed to decide the set of experimental runs. The regression models have been developed to investigate the influence of welding variables on the tensile strength and elongation of the welded joint. It is revealed that with the increase in welding parameters like tool rpm, tool feed rate and tilt angle of the tool, both the mechanical properties increase, reach a maximum level, followed by a decrease with further increase in the value of parameters. Amongst different types of tool pin profiles used, the FSW tool having straight cylindrical (SC) pin profile is found to yield the maximum strength and elongation of the welded joint for different combinations of welding parameters. Multiple response optimization indicates that the maximum UTS (135.83 MPa) and TE (4.35%) are obtained for the welded joint fabricated using FSW tool having SC pin profile, tilted at 1.11° and operating at tool speed and feed rate of 1568 rpm and 39.53 mm/min., respectively.

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