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Open AccessFeature PaperArticle

Laser Powder Cladding of Ti-6Al-4V α/β Alloy

National Institute of Laser Enhanced Sciences (NILES), Cairo University, Giza 12611, Egypt
Faculty of Engineering, Cairo University, Giza 12611, Egypt
Central Metallurgical Research and Development Institute (CMRDI), Helwan 11731, Egypt
Author to whom correspondence should be addressed.
Materials 2017, 10(10), 1178;
Received: 10 August 2017 / Revised: 30 September 2017 / Accepted: 11 October 2017 / Published: 15 October 2017
(This article belongs to the Special Issue Laser in Nanotechnology and Biomedical Applications)
Laser cladding process was performed on a commercial Ti-6Al-4V (α + β) titanium alloy by means of tungsten carbide-nickel based alloy powder blend. Nd:YAG laser with a 2.2-KW continuous wave was used with coaxial jet nozzle coupled with a standard powder feeding system. Four-track deposition of a blended powder consisting of 60 wt % tungsten carbide (WC) and 40 wt % NiCrBSi was successfully made on the alloy. The high content of the hard WC particles is intended to enhance the abrasion resistance of the titanium alloy. The goal was to create a uniform distribution of hard WC particles that is crack-free and nonporous to enhance the wear resistance of such alloy. This was achieved by changing the laser cladding parameters to reach the optimum conditions for favorable mechanical properties. The laser cladding samples were subjected to thorough microstructure examinations, microhardness and abrasion tests. Phase identification was obtained by X-ray diffraction (XRD). The obtained results revealed that the best clad layers were achieved at a specific heat input value of 59.5 J·mm−2. An increase by more than three folds in the microhardness values of the clad layers was achieved and the wear resistance was improved by values reaching 400 times. View Full-Text
Keywords: laser surface treatment; co-axial laser cladding process; titanium alloys; microhardness; wear resistance laser surface treatment; co-axial laser cladding process; titanium alloys; microhardness; wear resistance
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Al-Sayed Ali, S.R.; Hussein, A.H.A.; Nofal, A.A.M.S.; Hasseb Elnaby, S.E.I.; Elgazzar, H.A.; Sabour, H.A. Laser Powder Cladding of Ti-6Al-4V α/β Alloy. Materials 2017, 10, 1178.

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