The Precision Machining group of the Institut für Strahlwerkzeuge (IFSW) continues investigate the topic of heat accumulation during ultra-short pulsed laser processing. Hereby, carbon fiber reinforced plastics (CFRP) are of particular interest since they are very heat sensitive. On this topic the IFSW cooperates with the General Physics Institute (GPI) in Moscow.
As a result of this cooperation four peer-reviewed papers were published within the last year addressing heat accumulation effects and their influencing factors:
- “Influence of pulse repetition rate and pulse energy on the heat accumulation between subsequent laser pulses during laser processing of CFRP with ps pulses” published in Applied Physics A (https://doi.org/10.1007/s00339-018-1891-z).
- “Heat accumulation between scans during multi-pass cutting of carbon fiber reinforced plastics” published in Applied Physics A (https://doi.org/10.1007/s00339-018-1647-9).
- “Residual heat generated during laser processing of CFRP with picosecond laser pulses” published in Advanced Optical Technologies (https://doi.org/10.1515/aot-2018-0001).
- “Influence of pulse repetition rate on percussion drilling of Ti-based alloy by picosecond laser pulses” published in Optics and Lasers in Engineering (https://doi.org/10.1016/j.optlaseng.2017.12.003).
With these publications the IFSW and the GPI lay the scientific foundations for the successful upscaling of the ultra-short pulsed laser processes to high average laser powers which is one of the current challenges in micro materials processing.