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Ultrahigh-strength friction stir spot welds of aluminium alloy obtained by Fe3O4 nanoparticles

Fereiduni, E ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1080/13621718.2017.1356031
  3. Publisher: Taylor and Francis Ltd , 2018
  4. Abstract:
  5. The present research was aimed at simultaneous increase in strength and fracture energy of friction stir spot weld of Al-5083 alloy via reinforcing by Fe3O4 nanoparticles. Compared to non-reinforced welds, failure load and fracture energy of reinforced welds increased up to ∼115 and 560%, respectively. These findings were discussed in the light of grain refinement as well as considerable increase in hardness of fracture location due to the presence of sub-micron and nano reinforcing particles (RPs). Fe3O4 nanoparticles were transformed to Al–Fe intermetallics due to their small size and heat generated during the welding process. The stir zone of reinforced welds consisted of three different grain structures among which the finest one was related to the composite structure containing well-distributed RPs in the aluminium matrix. © 2017 Institute of Materials, Minerals and Mining. Published by Taylor & Francis on behalf of the Institute
  6. Keywords:
  7. Aluminium alloy ; Fe3O4 nanoparticle ; Aluminum ; Aluminum alloys ; Fracture energy ; Friction ; Friction stir welding ; Grain refinement ; Grain size and shape ; Intermetallics ; Microhardness ; Nanoparticles ; Reinforcement ; Spot welding ; Tribology ; Welding ; Welds ; Failure load ; Fe intermetallics ; Fe3O4 nanoparticles ; Fracture location ; Friction stir spot weld ; Friction stir spot welding ; Reinforcing particles ; Ultrahigh strength ; Fracture
  8. Source: Science and Technology of Welding and Joining ; Volume 23, Issue 1 , 2018 , Pages 63-70 ; 13621718 (ISSN)
  9. URL: https://www.tandfonline.com/doi/abs/10.1080/13621718.2017.1356031