A study on wear resistance and microcrack of the Ti3Al/TiAl + TiC ceramic layer deposited by laser cladding on Ti-6Al-4V alloy

作者：Li, Jianing^*; Chen, Chuanzhong; Squartini, Tiziano; He, Qingshan

来源：Applied Surface Science, 2010, 257(5): 1550-1555.

DOI：10.1016/j.apsusc.2010.08.094

• Titanium alloys
• Surfaces
• Microcrack
• Wear resistance
• Microstructure

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.

• 出版日期2010-12-15
• 单位山东大学