Three-dimensional finite element modelling of laser surface modification

A three-dimensional finite element modelling of laser surface modification is presented. The design capabilities of the ANSYS parametric design langua ge (APDL) were employed for this purpose. The model calculates transient te mperature profiles and the dimensions of fusion and the heat-affected zone (HAZ). Model simulations are compared with experimental results, acquired o n-line using an ultra-high shutter speed camera which is able to acquire we ll-contrasted images of the molten pool, and off-line, using metallographic al analysis, that show very good agreement. The results are further discuss ed to provide directions for feedback and process control.