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IN-SITUSYNTHETICTiB2PARTICULATE REINFORCED METAL MATRIX COMPOSITE COATING ON AA2024 ALUMINUM ALLOY BY LASER CLADDING TECHNOLOGY

Author

Listed:
  • JIANG XU

    (Department of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing 210016, P. R. China;
    Laser Processing Research Center, Mechanical Engineering Department, Tsinghua University, Beijing 10084, P. R. China)

  • YIDE KAN

    (Laser Processing Research Center, Mechanical Engineering Department, Tsinghua University, Beijing 10084, P. R. China)

  • WENJIN LIU

    (Laser Processing Research Center, Mechanical Engineering Department, Tsinghua University, Beijing 10084, P. R. China)

Abstract

In order to improve the wear resistance of aluminum alloy,in-situsynthesizedTiB2andTi3B4peritectic composite particulate reinforced metal matrix composite, formed on a 2024 aluminum alloy by laser cladding with a powder mixture ofFe-coated Boron,TiandAl, was successfully achieved using 3-KW CWCO2laser. The chemical composition, microstructure and phase structure of the composite clad coating were analyzed by energy dispersive X-ray spectroscopy (EDX), SEM, AFM and XRD. The typical microstructure of the composite coating is composed ofTiB2,Ti3B4,Al3Ti,Al3Feandα-Al. The surface hardness of cladding coating increases with the amount of addedFe-coatedBandTipowder which determines the amount ofTiB2andTi3B4peritectic composite particulate. The nanohardness and the elastic modulus at the interface of theTiB2andTi3B4peritectic composite particulate/matrix were investigated using the nanoindentation technique. The results showed that the nanohardness and the reduced elastic modulus from the peritectic composite particulate to the matrix is a gradient distribution.

Suggested Citation

  • Jiang Xu & Yide Kan & Wenjin Liu, 2005. "IN-SITUSYNTHETICTiB2PARTICULATE REINFORCED METAL MATRIX COMPOSITE COATING ON AA2024 ALUMINUM ALLOY BY LASER CLADDING TECHNOLOGY," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 12(04), pages 561-567.
    • Handle: RePEc:wsi:srlxxx:v:12:y:2005:i:04:n:s0218625x05007438
    DOI: 10.1142/S0218625X05007438
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