Product Code: ICA10_M105

Laser Micromachining of CFRP by Ultra-Short Pulse Lasers
Authors:
Masayuki Fujita, Institute for Laser Technology; Osaka Japan
Toshihiro Somekawa, Institute for Laser Technology; Suita Japan
Takumi Ozaki, Kinki University; Higashiosaka Japan
Minoru Yoshida, Kinki University; Higashiosaka Japan
Noriaki Miyanaga, Osaka University; Suita, Osaka Japan
Yutaka Mitooka, Industrial Technology Center of Okayama Prefecture; Okayama Japan
Kazuhisa Mikame, Laserx Co.,Ltd.; Chiryu Japan
Hideyasu Shamoto, Laserx Co.,Ltd.; Chiryu Japan
Presented at ICALEO 2010

CFRP (Carbon Fiber-Reinforced Plastic), which is a composite material consisted of carbon fiber and polymer matrix, has attractive features like high strength and light weight. We have been investigating micromachining of CFRP by ultra-short laser pulses in order to minimize material damages and HAZ. The laser system used in this study was a commercially available Ti:Sapphire laser (Spectra Physics, Hurricane). The fundamental wavelength, pulsewidth, rep. rate were 800nm, 100fs and 1kHz, respectively. For comparison, we also used 200ps stretched pulses from the Ti:Sap. laser and output from a 200ns pulsed fiber laser. Various samples of CFRP were supplied by Japanese leading manufacturing companies, which included uni-directional and cross-ply composite laminates, short and long carbon fiber pellet composites. Optimizations of the laser parameters were investigated.