Acta Metallurgica Sinica (English Letters) ›› 2020, Vol. 33 ›› Issue (1): 30-42.DOI: 10.1007/s40195-019-00982-4

• Original Paper • Previous Articles     Next Articles

Refill Friction Stir Spot Welding of Similar and Dissimilar Alloys: A Review

Xiao-Song Feng1(), Song-Bin Li1, Li-Na Tang1, Hui-Min Wang2   

  1. 1 Shanghai Aerospace Equipments Manufacturer Co., Ltd, Shanghai 200245, China
    2 National Center for Materials Service SafetyUniversity of Science and Technology, Beijing, Beijing 100083, China
  • Received:2019-04-11 Revised:2019-05-21 Online:2020-01-10 Published:2020-02-20
  • Contact: Feng Xiao-Song

Abstract:

Refill friction stir spot welding, also known as friction spot welding (FSpW), is a solid-state welding process suitable for spot joining of lightweight materials. Through the efforts of improving joint quality for similar and dissimilar materials, for example, aluminum and magnesium, this joining technology is well developed. The joining mechanism and process characteristics of FSpW have been widely studied. However, the application of FSpW in industry has not been entirely successful. In this review article, the research of similar and dissimilar material joints, such as, Al/Cu, Al/Ti, Al/Mg and Al/Steel, is summarized. The microstructural features and mechanical properties of the joints, welding tool and the application development are discussed in detail.

Key words: Refill friction stir spot welding, Dissimilar joints, Microstructure, Mechanical properties, Welding parameters