Laser-driven flyer application in thin film dissimilar materials welding and spalling |
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| Institution: | 1. Department of Materials Science and Engineering, The Ohio State University, 2041 College Rd., Columbus, OH 43210, United States;2. Robotics Institute, School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, PR China;1. Northwestern Polytechnical University, 127 Youyixi road, Shanxi province, Xi''an 710072, China;2. Xidian University, 2 Taibaisouth road, Shanxi province, Xi''an 710071, China;1. School of Physics, Shandong University, Jinan 250100, China;2. School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China;3. Department of engineering mechanics, Dalian University of Technology, Dalian 116024, China;4. School of civil engineering and architecture, Jinan University, Jinan 2250020, China;1. Ultrasound Elasticy Imaging Laboratory (UEIL), Department of Biomedical Engineering, Columbia University, 51 Engineering Terrace 1210 Amsterdam Avenue, New York 10031, USA;2. Biophysics and Biomedical Physics Laboratory (Bimef), Department of Physics, Antwerp University, 171 Groenenborgerlaan; Antwerp, Antwerp 2020, Belgium;3. Laser and Fiber Electronics Group (LFEG), Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, Lower Silesia, Wroclaw 50-372, Poland;1. University of Chinese Academy of Sciences, Beijing 100049, China;2. School of Computer Science & Technology, Sichuan University, Chengdu 610064, China;3. The Institute of Optics and Electronics, Chinese Academy of Science, Chengdu 610209, China |
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| Abstract: | This paper applied a low cost method to pack and drive laser-driven flyer in the applications of welding and spalling. The laser system has the maximum energy of 3.1 J, which is much lower than that used in the previous study. The chemical release energy from the ablative layer was estimated as 3.7 J. The flying characteristic of laser-driven flyer was studied by measuring the flyer velocity at different locations with photonic Doppler velocimetry (PDV). The application of laser-driven flyer in welding Al and Cu was investigated at different laser spot size. Weld strength was measured with the peel test. Weld interface was characterized with optical microscopy (OM) and scanning electron microscopy (SEM). The study of application of laser-driven flyer in spalling was carried out for both brittle and ductile materials. The impact pressure was calculated based on the Hugoniot data. The amount of spalling was not only related to the impact pressure but also related to the duration of impact pressure. The fractography of spalled fracture surface was studied and revealed that the fracture mode was related to the strain rate. The spall strength of Cu 110, Al 1100 and Ni 201was measured and was consistent with the literature data. |
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