Journal
APPLIED SURFACE SCIENCE
Volume 257, Issue 5, Pages 1550-1555Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2010.08.094
Keywords
Titanium alloys; Surfaces; Microcrack; Wear resistance; Microstructure
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Funding
- Development Project of Science and Technology of Shandong Province [2006GG2204010]
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Laser cladding of the Al + TiC alloy powder on Ti-6Al-4V alloy can form the Ti3Al/TiAl + TiC ceramic layer. In this study, TiC particle-dispersed Ti3Al/TiAl matrix ceramic layer on the Ti-6Al-4V alloy by laser cladding has been researched by means of X-ray diffraction, scanning electron microscope, electron probe micro-analyzer, energy dispersive spectrometer. The main difference from the earlier reports is that Ti3Al/TiAl has been chosen as the matrix of the composite coating. The wear resistance of the Al + 30 wt.% TiC and the Al + 40 wt.% TiC cladding layer was approximately 2 times greater than that of the Ti-6Al-4V substrate due to the reinforcement of the Ti3Al/TiAl + TiC hard phases. However, when the TiC mass percent was above 40 wt.%, the thermal stress value was greater than the materials yield strength limit in the ceramic layer, the microcrack was present and its wear resistance decreased. (c) 2010 Elsevier B.V. All rights reserved.
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