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Effect of an anodizing pre-treatment on AA 5052 alloy/polypropylene joining by friction stir spot welding

Aliasghari, S ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1016/j.mseb.2019.05.018
  3. Publisher: Elsevier Ltd , 2019
  4. Abstract:
  5. A study has been carried out of the effect of an anodizing pre-treatment in a sulphuric acid electrolyte on the strength of AA 5052 alloy/polypropylene joints prepared using friction stir spot welding. Lap-shear tests were used to determine the joint strength. Comparisons were made with joints pre-treated using sand blasting. The failed specimens were examined by scanning and transmission electron microscopy. Anodizing improved the strength of the joints by a factor of about 6 compared with sandblasting. For the anodizing pre-treated joints, melted polymer infiltrated deeply within the nanoporous anodic film, forming a strong polymer-film bond. Joint failure occurred by ductile tearing of the polymer at or near the film surface. In contrast, sandblasted joints failed at the alloy/polymer interface
  6. Keywords:
  7. Aluminium alloy ; Anodizing ; Friction stir spot welding ; Plasma electrolytic oxidation ; Polypropylene ; Aluminum alloys ; Anodic oxidation ; Ascorbic acid ; Electrolysis ; Electrolytes ; Friction ; High resolution transmission electron microscopy ; Polymer films ; Polypropylenes ; Scanning electron microscopy ; Semiconducting films ; Spot welding ; Acid electrolytes ; Ductile tearing ; Joint strength ; Lap shear tests ; Melted polymers ; Scanning and transmission electron microscopy ; Friction stir welding
  8. Source: Materials Science and Engineering B: Solid-State Materials for Advanced Technology ; Volume 245 , 2019 , Pages 107-112 ; 09215107 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0921510719301436