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An investigation into microstructures and mechanical properties of AA7075-T6 during friction stir welding at relatively high rotational speeds

Azimzadegan, T ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1007/s11665-010-9625-1
  3. Publisher: 2010
  4. Abstract:
  5. In this study, microstructural changes and mechanical properties during friction stir welding of AA7075-T6 have been investigated. Friction stir welding at relatively high rotational speeds ranging from 1000 to 1400 rpm and longitudinal speeds in the range of 40 to 80 mm/min have been performed and then microstructures and mechanical properties of the weldments have been studied. The results show that the rotational and longitudinal speeds have a significant effect on the microstructures as well as the mechanical behavior of the welded material while a fine grain structure is produced at higher ratio of rotational speed to longitudinal speed. On the other hand, for a given longitudinal speed, it is revealed that there is an optimum rotational speed which gives the highest tensile strength and elongation for the stirred zone
  6. Keywords:
  7. 7075 aluminum alloy ; Fine grain structure ; Friction stir ; High rotational speed ; Mechanical behavior ; Microstructural changes ; Microstructures and mechanical properties ; Rotational speed ; Welded materials ; Weldments ; Aluminum ; Aluminum alloys ; Friction ; Gas welding ; Mechanical properties ; Microstructure ; Speed ; Tensile strength ; Tribology ; Friction stir welding
  8. Source: Journal of Materials Engineering and Performance ; Volume 19, Issue 9 , December , 2010 , Pages 1256-1263 ; 10599495 (ISSN)
  9. URL: http://link.springer.com/article/10.1007%2Fs11665-010-9625-1