HIGH POWER FIBER LASER EFFUSION HOLE DRILLING APPARATUS AND METHOD OF USING SAME

摘要

A fiber laser-treated workpiece is configured with a body having a discontinuous surface which defines a plurality of spaced through-going passages so that each passage is delimited by a peripheral layer having a surface characteristic which, includes a recast layer or o»e or as ore microcracks or a combination thereof. The passages are provided by a high power Yb fiber laser operating la a pulsed regime and configured to output either a single pulse per an entire passage or a train of pulses per the passage. The Yb fiber laser is so configured that, if formed, the recast layer and micro-crack each are smaller than respective standards in as airspace industry.