Work-Piece Material (AA6082-T6) Response during Friction Stir Spot Welding (FSSW) Process

M. A. Meraj^1*, S. Khosa ^{2, 3}, T. Weinberger^{4, 5}, N. Enzinger⁵,

¹ COMSATS Institute of Information Technology, Sahiwal, Pakistan

² Pakistan Institute of Engineering and Applied Sciences (PIEAS), PO Nilore, Islamabad, Pakistan  

³ Pakistan Atomic Energy Commission (PAEC), PO Box 1356, Islamabad, Pakistan  

⁴ Stirzone GmbH, Graz, Austria

⁵ Institute of Materials Science and Welding, Graz University of Technology, Austria

* Corresponding author: asad@ciitsahiwal.edu.pk  

ABSTRACT

Friction Stir Welding (FSW) and its variant Friction Stir Spot Welding (FSSW) are solid state welding techniques. These procedures rely on the transition of work-piece material from a solid mechanic to a rheological visco-plastic one, to join the faying surfaces [1]. Thermal softening and work hardening are the competitive phenomena until these establish a dynamic equilibrium as the behavioral mechanism during this process [2].

In this presentation this dynamic behavior of work-piece for AA6082-T6 material is discussed. Some results for theoretical investigation and its experimental validation are presented using Finite Element Method to develop a 3D coupled Thermo-mechanical process model for FSSW.  

REFERENCES

[1] RS Mishra, ZY Ma; Friction Stir Welding and Processing; Materials Science and Engineering R 50 (2005) 1-78

[2] SU Khosa, T Weinberger, N Enzinger; A Novel Approach for 3D Modeling of FSSW Process; Mathematical Modeling of Weld Phenomena, Ed-09, 2010