The behavior of laser micro-drilling of an Al-Li/SiC metal matrix composite was studied using a pulsed Nd:YAG laser. The concept of critical intensity was employed to predict the profile and the diameter of the drilled hole. The dimension of the hole was found to be related to the relative position of the laser focal spot to that of the workpiece. In the case of through hole drilling of thin sheet material, the diameter of the hole can be best controlled by the beam intensity. Moreover, a moving laser source, by nature of its tunnelling action, can improve on the uniformity of the dimension of the processed hole, this is particularly valid for thick materials.
|Title of host publication||NIST Special Publication|
|Number of pages||5|
|Publication status||Published - 1 Jun 1993|
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