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Projection friction stir spot welding: a pathway to produce strong keyhole-free welds

Mousavizade, S. M ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1080/13621718.2018.1521068
  3. Publisher: Taylor and Francis Ltd , 2019
  4. Abstract:
  5. This paper introduces a novel facile method, called projection friction stir spot welding, to produce a keyhole-free friction stir welds based on a pinless tool method involving using a specially designed projection on the surface of the backing anvil. The projection plays two key roles contributing to the bonding mechanism and the joint strength: (i) encouraging the material flow perpendicular to the joint interface and (ii) bending the joint interface at the edge of the projection. The process enables pathway to produce keyhole-free welds with superior mechanical performance in steel sheets compared to the other spot welding techniques. © 2018, © 2018 Institute of Materials, Minerals and Mining. Published by Taylor & Francis on behalf of the Institute
  6. Keywords:
  7. Keyhole ; Steels ; Friction ; Microstructure ; Spot welding ; Steel ; Welds ; Bonding mechanism ; Facile method ; Friction stir spot welding ; Joint interfaces ; Joint strength ; Material Flow ; Mechanical performance ; Friction stir welding
  8. Source: Science and Technology of Welding and Joining ; Volume 24, Issue 3 , 2019 , Pages 256-262 ; 13621718 (ISSN)
  9. URL: https://www.tandfonline.com/doi/abs/10.1080/13621718.2018.1521068