Laser Beam Machining of Titanium Alloy-A Review

This study investigates the laser beam machining mechanism, surface formation mechanisms, heat-affected zone, taper formation, and the dimensional deviation of the titanium alloy, based on the information available in literature. The heat induced by the laser beam melts and vaporises titanium alloy, which is removed by a high pressure-assisted gas. The machined titanium alloy surface is expected to have craters and resolidified materials which were contributed by the low thermal conductivity of the titanium alloy. Taper and circularity error can be minimised by optimising the laser parameter, but it cannot be avoided in the laser beam machining of titanium alloy. Laser beam machining induces a non-diffusion phase transformation, which slightly changes the surface mechanical properties of the titanium alloys. Laser beam machining is gaining popularity as a way to improve the surface finish quality and properties of titanium components manufactured by additive manufacturing processes. To enhance the machining efficacy of titanium alloys, several hybrid machining processes were proposed.

Automated summary

This study investigates the mechanism of laser beam machining on titanium alloy, including surface formation, heat-affected zone, taper formation, and dimensional deviation. The study also explores the possibility of improving surface finish quality and properties of titanium components by using laser beam machining. Several hybrid machining processes were proposed to enhance the machining efficacy of titanium alloys.