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Improving appearance and mechanical strength of aluminum-polypropylene/talc composite friction stir joint using a novel tool design

Shiravi, H ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1007/s00170-022-09581-7
  3. Publisher: Springer Science and Business Media Deutschland GmbH , 2022
  4. Abstract:
  5. In this research, friction stir joining of aluminum-polypropylene/talc composite was investigated due to the numerous applications of aluminum-polymer joints in automotive and aerospace industry. A novel tool design, including a rotary/stationary holder, was used to improve the appearance and mechanical performance of friction stir lap joints by preventing the mixed molten polymer and aluminum particles from exiting the stirred zone. Effect of tool transverse speed on the joint microstructure and strength was investigated. Using the rotary/stationary holder, tensile-shear strength of the joints increased (by ~ 45 to ~ 220% at various transverse speeds). Since during the tensile-shear test all joints failed from the aluminum/stirred zone interface, joint strength was affected by the formation of anchor-like aluminum pieces in the composite substrate as the mechanical locks, reaction layer at the joint interface, and large voids near the aluminum/stirred zone interface. Joining at the optimum transverse speed led to the highest tensile-shear peak load of 315 N. © 2022, The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature
  6. Keywords:
  7. Composite ; Polypropylene ; Aerospace industry ; Aluminum ; Friction ; Friction stir welding ; Joining ; Aluminum polymers ; Friction stir ; Friction stir joining ; Joint strength ; Lap joint ; Mechanical ; Mechanical performance ; Polymer joints ; Tool designs ; Zone interface ; Polypropylenes
  8. Source: International Journal of Advanced Manufacturing Technology ; Volume 121, Issue 5-6 , 2022 , Pages 3717-3730 ; 02683768 (ISSN)
  9. URL: https://link.springer.com/article/10.1007/s00170-022-09581-7