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Shell Internationale Research Maatschappij BV Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Jablonski Current Assignee (The listed assignees may be inaccurate. ( en Inventor John Michael Vitek Michael Patrick Brady Joseph Arno Horton, Jr. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related Application number CA2649394A Other languages French ( fr)
JMATPRO 912 PDF
Google Patents Adjusting alloy compositions for selected properties in temperature limited heatersĭownload PDF Info Publication number CA2649394C CA2649394C CA2649394A CA2649394A CA2649394C CA 2649394 C CA2649394 C CA 2649394C CA 2649394 A CA2649394 A CA 2649394A CA 2649394 A CA2649394 A CA 2649394A CA 2649394 C CA2649394 C CA 2649394C Authority CA Canada Prior art keywords heater temperature formation ferromagnetic heat Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents CA2649394C - Adjusting alloy compositions for selected properties in temperature limited heaters The experimental study also prove the above mentioned preposition on a correlation among the processing-microstructure-mechanical properties during FSW, especially when comparing the UTS of samples from cold and hot weld conditions.CA2649394C - Adjusting alloy compositions for selected properties in temperature limited heaters Using the same integrated multiphysics model, for the first time we also present a new semi-experimental approach to measure strain during FSW using visioplasticity.įinally, we perform a comprehensive experimental study (tensile testing, Electron Back Scatter Diffraction, Scanning Electron Microscopy, and micro-hardness testing) on FSW of aluminum 6061 samples in order to further validate the developed numerical model and optimize the welding process parameters (tool rotation speed, weld speed and axial force). In order to investigate the effect of different material constitutive equations on this integrated multiphysics model, we implement and compare most commonly used CFD (Computational Fluid Dynamics) and CSM (Computational Solid Mechanics) constitutive equations and show their similarities and differences. The model can additionally predict microstructural changes during and after FSW as well as residual stresses. Next, we develop and validate a novel two-dimensional Eulerian steady-state “integrated multiphysics” model of FSW of aluminum 6061 which did not exist earlier in the literature and can simultaneously predict temperature, shear strain rate, shear stress and strain fields over the entire workpiece. Using further experimental studies we also propose that another determining parameter in the resulting mechanical properties of FSW welds is the material flow around the tool which in very cold weld conditions may cause low mechanical properties due to low mechanical bonding. Next, based on the current state-of-the-art and a validated 3D thermal model for aluminum 6061 along with a Taguchi design of experiments approach, we make a proposition that hot welds (with maximum temperature during FSW) have the lowest mechanical properties as opposed to cold welds.
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To this end, in this paper-based dissertation, first we review various models and optimization methods used in the field of FSW. The main objective of this work is the development of a novel integrated multiphysics modeling, testing, and optimization of friction stir welding (FSW) for aluminum alloys, and thereby facilitating a better understating of processing-microstructure-properties relationships in this relatively new welding technique.