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MICROSTRUCTURE AND DRY SLIDING WEAR RESISTANCE OF LASER CLADDING Ti-Al-Si COMPOSITE COATING

Author

Listed:
  • H. X. ZHANG

    (Suzhou Institute, Shandong University, Suzhou 215123, P. R. China‡Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Ji’nan 250061, Shandong, P. R. China§School of Mechanical and Electronic Engineering, Qingdao Binhai University, Qingdao 266555, P. R. China)

  • H. J. YU

    (Suzhou Institute, Shandong University, Suzhou 215123, P. R. China†Key Laboratory of High-efficiency and Clean Mechanical Manufacture, (Shandong University), Ministry of Education, School of Mechanical Engineering, Shandong University, Ji’nan 250061, Shandong, P. R. China)

  • C. Z. CHEN

    (Suzhou Institute, Shandong University, Suzhou 215123, P. R. China‡Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Ji’nan 250061, Shandong, P. R. China)

  • J. J. DAI

    (Suzhou Institute, Shandong University, Suzhou 215123, P. R. China‡Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Ji’nan 250061, Shandong, P. R. China§School of Mechanical and Electronic Engineering, Qingdao Binhai University, Qingdao 266555, P. R. China)

Abstract

In order to improve the wear resistance of Ti alloys, different mass ratios of Ti-Si-Al powders were designed to fabricate hard phases reinforced intermetallic matrix composite coatings on the Ti-6Al-4V substrate by laser cladding. The corresponding coatings were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and high resolution transmission microscopy (HRTEM). The HV-1000 hardness tester and MM200 wear test machine were employed to test the hardness and the wear resistance of the composite coatings, respectively. The composite coatings mainly consisted of the reinforcements of Ti5Si3, Ti3AlC2 and Ti7Al5Si12 and the matrix of Ti3Al, TiAl, TiAl3 and α-Ti. The micro-hardness of the Ti-35Al-15Si coating was from 956 HV0.2 to 1130 HV0.2, which was approximately 3–4 times of the substrate and the highest in the three samples. The wear rate of the Ti-35Al-15Si coating was 0.023cm3⋅min−1, which was about 1/4 of the Ti-6Al-4V substrate. It was the lowest in the three samples.

Suggested Citation

  • H. X. Zhang & H. J. Yu & C. Z. Chen & J. J. Dai, 2017. "MICROSTRUCTURE AND DRY SLIDING WEAR RESISTANCE OF LASER CLADDING Ti-Al-Si COMPOSITE COATING," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 24(Supp01), pages 1-10, November.
    • Handle: RePEc:wsi:srlxxx:v:24:y:2017:i:supp01:n:s0218625x18500099
    DOI: 10.1142/S0218625X18500099
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