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Surface modification of titanium alloy with the Ti3Al + TiB2/TiN composite coatings

Li, J. N. and Chen, C. Z. and Cui, B. B. and Squartini, Tiziano Surface modification of titanium alloy with the Ti3Al + TiB2/TiN composite coatings. Surface and Interface Analysis, 43 (12). pp. 1543-1548. ISSN 0142-2421 (2011)

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Abstract

Laser cladding of the Ti3Al + TiB2 pre-placed alloy powder on the Ti–6Al–4 V alloy in nitrogen protective atmosphere can form the Ti3Al + TiB2/TiN composite coating, which can dramatically improve the wear resistance of the Ti–6Al–4 V alloy surface. In this study, the Ti3Al + TiB2/TiN composite coatings on the Ti–6Al–4 V alloy have been researched by means of X-ray diffraction, SEM and energy dispersive spectrometry. It was found that there is a metallurgical combination between the Ti3Al + TiB2/TiN composite coating and the substrate. The microhardness of the Ti3Al + TiB2/TiN composite coatings were 3 ~ 4 times higher than that of the Ti–6Al–4 V alloy because of the actions of the Ti3Al + TiB2/TiN hard phases and the grain refinement strengthening. Moreover, the wear mass losses of the Ti3Al + TiB2/TiN composite coatings were much lower than that of the substrate. Copyright © 2011 John Wiley & Sons, Ltd.

Item Type: Article
Identification Number: 10.1002/sia.3809
Uncontrolled Keywords: Laser cladding technology, Interface, surfaces, Composite coating
Subjects: Q Science > QC Physics
Research Area: Economics and Institutional Change
Depositing User: Caterina Tangheroni
Date Deposited: 05 Nov 2015 11:11
Last Modified: 05 Nov 2015 11:11
URI: http://eprints.imtlucca.it/id/eprint/2811

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