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Title: Oxygen-assisted multipass cutting of carbon fiber reinforced plastics with ultra-short laser pulses

Deep multipass cutting of bidirectional and unidirectional carbon fiber reinforced plastics (CFRP) with picosecond laser pulses was investigated in different static atmospheres as well as with the assistance of an oxygen or nitrogen gas flow. The ablation rate was determined as a function of the kerf depth and the resulting heat affected zone was measured. An assisting oxygen gas flow is found to significantly increase the cutting productivity, but only in deep kerfs where the diminished evaporative ablation due to the reduced laser fluence reaching the bottom of the kerf does not dominate the contribution of reactive etching anymore. Oxygen-supported cutting was shown to also solve the problem that occurs when cutting the CFRP parallel to the fiber orientation where a strong deformation and widening of the kerf, which temporarily slows down the process speed, is revealed to be typical for processing in standard air atmospheres.
Authors:
; ;  [1] ;  [2] ;  [3] ;  [4] ; ; ;  [3]
  1. Natural Sciences Center, General Physics Institute, Vavilov str. 38, 119991 Moscow (Russian Federation)
  2. (Russian Federation)
  3. Universität Stuttgart, Institut für Strahlwerkzeuge (IFSW), Pfaffenwaldring 43, 70569 Stuttgart (Germany)
  4. (Germany)
Publication Date:
OSTI Identifier:
22277878
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; CARBON FIBERS; CUTTING; DEFORMATION; GAS FLOW; HEAT AFFECTED ZONE; LASER RADIATION; NITROGEN; OXYGEN; PULSED IRRADIATION; REINFORCED PLASTICS