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Influence Of Microstructure Of Friction Stir Welded Joints On Growth And Properties Of Microarc Oxidation Coatings On Az31b Magnesium Alloy

Author

Listed:
  • TINGFANG CHEN

    (Key Laboratory for Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, P. R. China;
    Beijing Radiation Center, Beijing 100875, P. R. China;
    Department of Physics, Beijing Normal University, Beijing 100875, P. R. China)

  • YONGLIANG LI

    (Analytical and Testing Center, Beijing Normal University, Beijing 100875, P. R. China)

  • WENBIN XUE

    (Key Laboratory for Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, P. R. China;
    Beijing Radiation Center, Beijing 100875, P. R. China)

  • CHAOLIN YANG

    (Key Laboratory for Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, P. R. China;
    Beijing Radiation Center, Beijing 100875, P. R. China)

  • YAO QU

    (Key Laboratory for Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, P. R. China;
    Beijing Radiation Center, Beijing 100875, P. R. China)

  • MING HUA

    (Key Laboratory for Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, P. R. China;
    Beijing Radiation Center, Beijing 100875, P. R. China)

Abstract

Ceramic coatings on friction stir welded (FSW) joints of AZ31B magnesium alloy were fabricated by microarc oxidation (MAO) method in silicate electrolyte. Microstructure, phase constituents, microhardness and electrochemical corrosion behaviors of bare and coated magnesium alloys at different zones of FSW joints for different oxidation time were investigated. The influence of microstructure at different zones on the growth of MAO coatings was analyzed. The results show that the MAO coatings on FSW joints are uniform, and they have almost the same morphology, phase constituents, hardness and corrosion resistance at base metal, stir zone and heat-affected zone. The properties of MAO coatings are independent on the microstructures of AZ31B alloy. In addition, the microstructures of magnesium alloy near the coating/alloy interface at different zones of FSW joint was not changed by microarc discharge process.

Suggested Citation

  • Tingfang Chen & Yongliang Li & Wenbin Xue & Chaolin Yang & Yao Qu & Ming Hua, 2015. "Influence Of Microstructure Of Friction Stir Welded Joints On Growth And Properties Of Microarc Oxidation Coatings On Az31b Magnesium Alloy," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 22(02), pages 1-9.
    • Handle: RePEc:wsi:srlxxx:v:22:y:2015:i:02:n:s0218625x15500298
    DOI: 10.1142/S0218625X15500298
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