A study of the critical viscosity model of friction stir welding in relation to tool features
Matthews, Jacob Russell
Modeling Friction Stir Welding (FSW) has proven elusive over the past two decades since being patented by The Welding Institute in 1991. One promising model developed by Nandan et al. explains material flow through a critical viscosity. Material flow using a critical viscosity model is developed and examines how tool features affect viscosity and material flow. Four different tools with different features were used to conduct experimental welds to determine the roles of shoulder scrolls, pin threads, and the shape of the pin. In-process forces were measured, and specimen were tensile tested to analyze the impact of tool features. Finally, a new method to compare welding parameters across different tools and machines is developed and optimal parameters are discussed.
This item appears in the following collection(s):
Showing items related by title, author, creator and subject.
On the Immersed Friction Stir Welding of AA6061-T6: A Metallurgic and Mechanical Comparison to Friction Stir Welding Bloodworth, Thomas Stuart (2009-04-20)The objective of this research was to quantify the material properties as well as the forces unique to immersed friction stir welding (IFSW) as compared to conventional friction stir welding (FSW) performed in air on AA6061. ...
Improvements in Friction Stir Welding Control System and an Extremum Controller for Tracking Friction Stir Extrusion Process Reynolds, Jay Thomas (2017-11-22)Friction Stir Welding (FSW) is a solid state joining process that uses a reusable rotating tool to plasticize, mix, and join materials. For this thesis the control system of the lab’s FSW machine was redesigned to improve ...
Zhang, Jun (2005-04-08)The presence of severe search frictions undermines technological development since the long waiting period for the subsequent trade would discourage the selectiveness of product qualities. The introduction of money will ...