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