Abstract
The type and extent of residual stresses within laser surface modified alumina ceramic were investigated. Macro stresses were predicted with the help of the OOF2 simulation package, developed at the National Institute of Standards and Technology. The software utilizes a meshing technique to discretize the surface microstructure into a mesh suitable for finite-element analysis, which leads to stress determination. Micro stresses were estimated by the prediction of full width at half-maximum of the peaks from the X-ray diffraction patterns of processed samples. Under the present set of laser processing parameters, the ceramic was devoid of any major cracks, making it ideal for several applications. This study provides a tool for rapid evaluation and hence for controlling the stresses through tailoring the laser process parameters to suit a particular application.
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