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Advances in Materials Science and Engineering
Volume 2014, Article ID 697170, 11 pages
Review Article

Friction Stir Spot Welding: A Review on Joint Macro- and Microstructure, Property, and Process Modelling

1State Key Laboratory of Solidification Processing, Shaanxi Key Laboratory of Friction Welding Technologies, Northwestern Polytechnical University, Xi’an 710072, China
2School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China

Received 7 March 2014; Accepted 23 April 2014; Published 25 June 2014

Academic Editor: Achilleas Vairis

Copyright © 2014 X. W. Yang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Friction stir spot welding (FSSW) is a very useful variant of the conventional friction stir welding (FSW), which shows great potential to be a replacement of single-point joining processes like resistance spot welding and riveting. There have been many reports and some industrial applications about FSSW. Based on the open literatures, the process features and variants, macro- and microstructural characteristics, and mechanical properties of the resultant joints and numerical simulations of the FSSW process were summarized. In addition, some applications of FSSW in aerospace, aviation, and automobile industries were also reviewed. Finally, the current problems and issues that existed in FSSW were indicated.