Mechanical properties of a laser peened Ti-6Al-4Vcladding

Ti-6Al-4V/WC metal matrix composite (MMC) coatings provide an adequate solution for high wear resistance application of Ti-6Al-4V. Laser cladding process, which has been extensively researched as an advanced repairing and strengthening technology, is considered to be an important candidate to combin...

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Bibliographic Details
Published in:Optics and laser technology 2019-11, Vol.119, p.1
Main Authors: Umapathi, A, Swaroop, S
Format: Article
Language:English
Subjects:
Diamond pyramid hardness
Laser beam cladding
Lasers
Maintenance
Mechanical properties
Metal matrix composites
Microscopy
Morphology
Optical microscopy
Protective coatings
Solution strengthening
Surface properties
Titanium base alloys
Tungsten carbide
Wear resistance
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Summary:Ti-6Al-4V/WC metal matrix composite (MMC) coatings provide an adequate solution for high wear resistance application of Ti-6Al-4V. Laser cladding process, which has been extensively researched as an advanced repairing and strengthening technology, is considered to be an important candidate to combine the ductile metal matrix and high surface properties. In this study, the powder-presetting laser cladding technology was employed to fabricate WC particles reinforced MMC coatings applying pre-placed pure WC powder layers and Ti-6Al-4V/WC powder layers, respectively. These experiments were performed to investigate the influence of the pre-placed powder layers on the Ti-6Al-4V/WC MMC coatings. The morphology, microscopic characteristics and microhardness of the coatings were scrutinized using optical microscopy, X-ray diffractometer, scanning electron microscopy and Vickers hardness tester. The experimental results show that the coatings fabricated from pre-placed Ti-6Al-4V/WC powder are enhanced more obviously in comparison with pure WC powder, which is related to the more uniform distribution of WC, smooth morphology of coatings and homogeneous distribution of microhardness.
ISSN:0030-3992
1879-2545
DOI:10.1016/j.optlastec.2019.105572