Journal of Northeastern University Natural Science ›› 2014, Vol. 35 ›› Issue (10): 1422-1426.DOI: 10.12068/j.issn.1005-3026.2014.10.013

• Materials & Metallurgy • Previous Articles     Next Articles

Effect of Multipass Friction Stir Processing on Microstructures and Mechanical Properties of 5083O Aluminum Alloy

CHEN Yu1, LI Xiaohua2, FU Mingjie2, DING Hua1   

  1. 1. School of Materials & Metallurgy, Northeastern University, Shenyang 110819, China; 2. AVIC Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, China.
  • Received:2013-11-18 Revised:2013-11-18 Online:2014-10-15 Published:2014-05-19
  • Contact: DING Hua
  • About author:-
  • Supported by:
    -

Abstract: Multipass friction stir processing (3pass FSP with 100% overlap) was conducted under different diameters of shoulders, rotation speeds and travel speeds to investigate the effect of processing parameters on the microstructures and the mechanical properties of 5083O aluminum alloy. The results showed that the fine and dynamically recrystallized grains are observed in the FSP zone. With increasing the number of passes, the grain size and the tunnel defects decrease, the second phase particles are refined and distributed uniformity, the ultimate tensile strength reaches up to 360 MPa, and the elongation is higher than that of the base metal. The effect of the 2ndpass on the microstructures and mechanical properties is most obvious.

Key words: multipass, friction stir processing, 5083O aluminum alloy, microstructure, mechanical property

CLC Number: