Abstract
Several surface coatings on Ti-6Al-4V alloy using
laser treatment technique have been investigated in this paper.
A hybrid Ti-6Al-4V based metal matrix composites system was
also successfully fabricated. This was possible using three
hoper system which contained 3.8 vol. % of Ti-6Al-4V and a
small amount 0.1 B4C and 0.1 BN respectively. Two different
laser powers “2000 W and 1400 W with scanning speed of 1.0
were employed. The idea of these powder coatings and reason
for investigating the different Laser power is to evaluate the
influence of laser power on the surface morphology and
hardness property of Ti-6Al-4V/B4C/BN alloy systems. The
hardness result of experimental showed a general
improvement. The hardness revealed that the Ti-6Al-
4V/B4C/BN system fabricated at 2000W showed a hardness
improvement as high as 640.4 HVO.5 compared to the as receive
Ti-6Al-4V substrate Hardness value of about 357.3 HVO.5 and
that of 1400W recorded a hardness value of 886 HVO.5. The
percentage increase from the as received Ti-6Al-4V alloy was
147.9% and 79.2% respectively. Problems to be solved and the
prospective application of laser modification of the hybrid
titanium alloy formed were also highlighted.