|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Friction Stir Welding and Processing IX
||Effect of Pin Tool Profile on Metal Flow, Torque and Forces during Friction Stir Welding-limiting Friction Cases
||Narges Dialami, Miguel Cervera, Michele Chiumenti, Carlos Agelet de Saracibar
|On-Site Speaker (Planned)
This work studies pin tools with circular, triflute, trivex, and triangular profiles adopting a validated model of FSW process developed by the authors. The effect of rotating tool geometry on the flow behavior and FSW process outcomes is analyzed. The study is carried out for both slip and stick limiting friction cases between pin and workpiece employing Norton’s friction model. To characterize the material behavior during the weld, Norton-Hoff constitutive law is applied. The piecewise linear version of the model developed by the authors greatly facilitates the convergence of the numerical solution. The computational time consumed is further reduced through developing a two-phase speed-up strategy. The study shows that the geometries considered lead to significantly different process outcome and material flow patterns around the pin. The proposed modelling approach can be used to predict and interpret the FSW behavior when using specific pin geometry without the need for experimental trials.
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