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Showing 1 to 20 of 77 for “"Friction Stir"”.
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Modelling of Friction Stir Welding
This thesis investigates the modelling of friction stir welding (FSW). FSW is a relatively new welding process where a rotating non-consumable tool is used to join two materials through high temperature deformation. The aim of the thesis is the development of a numerical model to improve process …
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Fundamentals of friction stir spot welding
… very important and calls for more attention. Friction Stir Spot Welding (FSSW) is an evolving technique that offers several advantages over conventional joining processes.</p> <p>The fundamentals aspects of FSSW are systematically studied in this dissertation. The effects and influence of …
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Modelling of friction stir spot welding
Friction stir spot welding (FSSW) is a solid-state welding process which is especially useful for joining precipitation-hardened aluminium alloys that undergo adverse property changes during fusion welding. It also has potential as an effective method for solid-state joining of dissimilar alloys. …
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Friction stir welding simulation, optimization and design
Friction stir welding is an advanced welding technology mainly used to join aluminum alloys but with potential for other materials like steel, titanium and its alloys. The aim of this work is to provide a combination of numerical and experiment tools to understand the mechanisms of friction stir …
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Modeling and control of friction stir welding
"Friction stir welding (FSW) is receiving increased attention as an efficient solid state joining process for [a] number of reasons, including its applicability to different materials and high joint efficiencies. This apparently simple technique is affected by a number of different factors, such as …
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Friction stir welding of high temperature alloys
<p>"Friction stir welding (FSW) of Ti-6Al-4V alloy, nickel-based and iron-based oxide dispersion strengthened (ODS) alloys (MA754 and MA956) has been studied. The main aspects covered include tool evaluation, microstructural evolution, mechanical properties, and correlation between processing, …
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Material Flow Behavior in Friction Stir Welding
Material flow in friction stir welding is largely uncharacterized due to the difficulty in material flow measurement and visualization in metals. This study investigates plasticine for use as an analog for modeling material flow in friction stir welding (FSW) of metals. Qualitative comparisons …
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Processing Mechanics of Additive Friction Stir Deposition
Additive friction stir deposition (AFSD) is a newly developed solid-state metal additive manufacturing (AM) technology that adds a material feeding mechanism to the friction stir principle (Yu et al.., 2018). As a newly developed process, the development of a sound understanding of the process …
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Friction Stir Welding of High-Strength Automotive Steel
… ultra-high-strength steels (UHSS) by way of friction stir welding (FSW). Steels are welded together to create tailor-welded blanks (TWB) for use in the automotive industry. Dual Phase (DP) 590, 780, and 980 steel as well as Transformation-Induced Plasticity (TRIP) 590 steel with thicknesses …
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Characterizing the Frictional Interface in Friction Stir Welding
<p>Quantitative understanding of frictional phenomena between the tool and the workpiece is essential for accurate modeling of the Friction Stir Welding (FSW) process. Two methods of measuring the tool-workpiece interface are proposed that allow frictional measurements to be made under extreme …
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Statistical Investigation of Friction Stir Processing Parameter Relationships
Friction Stir Welding (FSW) is an emerging joining technology in which basic process understanding is still inadequate. Knowledge of FSW parameter relationships is needed to better understand the process and implement proper machine control. This study utilized a 3-factor, 3-level factorial design …
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Effects of Friction Stir Welding on Polymer Microstructure
… the relationships between several key Friction Stir Welding process parameters and the resulting microstructural and flexural properties of the welded joint. A series of four single parameter experiments were run. The parameters investigated were pin diameter, feedrate, shoe …
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Friction stir welding of commercially available superplastic aluminium
A series of Friction Stir Welds (FSW) has been produced in order to optimise tool designs and weld/process variables to minimise flaws in the weld and obtain the best possible microstructure for superplastic Forming (SPF). Therefore the main goal is to produce friction stir welds which do not fail …
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Friction stir processing for superplasticity and other applications
Friction stir welding is a recent welding technology that had expanding the capabilities of welding aluminum alloys. From this process, it was discovered that the microstructural properties of a metal could be altered with a single pass of the tool, and from this the area of friction stir …
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Localized Corrosion of Friction Stir Welded Magnesium AZ Alloys
… mechanisms governing the corrosion behaviour of friction stir welded magnesium AZ alloys. The investigation utilized an integrated approach consisting of several corrosion measurement techniques (both bulk and localized measurements) to examine the effect of individual microstructural features on …
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Heat Generation and Transfer in Additive Friction Stir Deposition
Additive friction stir deposition (AFSD) is an emerging solid-state additive manufacturing process that leverages the friction stir principle to deposit porosity-free material. The unique flow of material that allows for the transformation of bar stock into a near-net shape part is driven by the …
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Thermal Management In Friction Stir Welding of Aluminum Alloys
<p>At present Friction Stir Welding process design and implementation is mostly dependent on empirical information gathered through experience. Basic science of friction stir welding and processing can only be complete when fundamental interrelationships between process control parameters and …
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Two Dimensional Friction Stir Welding Model with Experimental Validation
… real-time temperature measurements during Friction Stir Processing (FSP) of 304L Stainless Steel was developed. The focus of the method was to ensure that the obtained temperatures were both accurate and repeatable. The method was then used to obtain thermal cycle data from nine welds, each …
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Investigation of Residual Stress In Friction Stir Welded Aluminum Alloys
… and metallurgical property development in friction stir welded 6xxx and 7xxx aluminum alloys through empirical observation and numerical modeling with an emphasis on residual stresses induced by processing. Thermal conditions and weld parameters are varied and resulting weld properties are …
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