A STUDY ON MICROSTRUCTURE CHARACTERISTICS OFIN SITUFORMEDTiCREINFORCED COMPOSITE COATINGS

Peng Liu (), Wei Guo and Hui Luo
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Peng Liu: School of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, P. R. China
Wei Guo: School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100191, P. R. China
Hui Luo: School of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, P. R. China

Surface Review and Letters (SRL), 2012, vol. 19, issue 02, 1-7

Abstract: In situsynthesizedTiCreinforced composite coating was fabricated by laser cladding ofAl-Ni-Cr-Cpowders on titanium alloys, which can greatly improve the surface performance of the substrate. In this study, theAl-Ni-Cr-Claser-cladded composite coatings have been researched by means of X-ray diffraction, scanning electron microscope (SEM) and electron probe micro-analyzer (EPMA). There was a metallurgical combination between theAl-Ni-Cr-Claser-cladded coating and theTi-6Al-4Vsubstrate, and the micro-hardness of theAl-Ni-Cr-Claser-cladded coating was in the range of ~1200–1450 HV0.2, which was ~3–4 times higher than that ofTi-6Al-4Vsubstrate. Furthermore,the reinforcement of theAl-Ni-Cr-Claser-cladded coating were mainly contributed to the action of theTiC,Ti3Al,Cr7C3,Al8Cr5phases and the solution strengthening.

Keywords: In situ; surfaces; coatings; microstructures (search for similar items in EconPapers)
Date: 2012
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DOI: 10.1142/S0218625X12500163

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