Laser drilling of stainless steel with nanosecond double-pulse |
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| Authors: | XD Wang A Michalowski D Walter S Sommer M Kraus JS Liu F Dausinger |
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| Institution: | aWuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Luoyu Road 1037, 430074 Wuhan, China;bInstitut für Strahlwerkzeuge (IFSW), University of Stuttgart, Pfaffenwaldring 43, 70569 Stuttgart, Germany;cForschungsgesellschaft für Strahlwerkzeuge mbH (FGSW) , Pfaffenwaldring 43, 70569 Stuttgart, Germany |
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| Abstract: | Nanosecond double-pulse laser drilling is reported in this paper. The double-pulse herein represents two closely conjoint pulses with 21 ns pulse duration and about 52 ns interpulse separation, which are acquired by temporal pulse shaping. Percussion drilling with such double-pulse is performed in stainless steel samples with different laser fluences, sample's thickness, repetition rates and ambient pressures. The experimental results show that the drilling rates of double-pulse drilling are more than one order of magnitude higher than that of conventional single-pulse drilling in air. Differences in the processing results between single-pulse and double-pulse with various processing parameters are investigated. In addition the ablation mechanisms of the double-pulse drilling are discussed. |
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| Keywords: | Laser drilling Double-pulse Pulse shaping |
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