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Mechanical and microstructural investigation of friction stir processed Al1100

Nasiri, A. M ; Sharif University of Technology

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  1. Type of Document: Article
  2. Abstract:
  3. Surfaces of cast 1100 aluminum were treated by multi-pass friction stir processing (MP-FSP), which is a solid-state microstructural modification technique using frictional heat and stirring action. An improvement in the mechanical properties was accomplished due to the microstructural modification and reduction of porosities. The yield strengths of the MP-FSPed specimens were significantly increased to about 1.4 times versus that of the base metal. The elongation of MP-FSP sample is about 30% higher than that of the base metal. Also the ultimate tensile strength and hardness of MP-FSPed specimens are improved. Moreover the effect of tool rotation rate and tool travel speed on the mechanical and microstructural properties in the stir zone has been investigated. It was found out that increasing the tool rotation rate or decreasing the tool travel speed leads to a decrease in yield and ultimate strength of the stir zone
  4. Keywords:
  5. Base metals ; Friction stir ; Friction stir processing ; Frictional heat ; Microstructural investigation ; Microstructural modification ; Microstructural properties ; Multi-pass ; Stir zones ; Tool rotations ; Travel speed ; Ultimate strength ; Ultimate tensile strength ; Yield strength ; Friction ; Hardness ; Rotation ; Tensile strength ; Mechanical properties
  6. Source: Welding in the World ; Volume 53, Issue SPECIAL ISSUE , 2009 , Pages 253-258 ; 00432288 (ISSN)