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5 March 2018 Simulation of vaporization in low fluence nanosecond laser ablation of aluminum alloy
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Proceedings Volume 10710, Young Scientists Forum 2017; 1071041 (2018)
Event: Young Scientists Forum 2017, 2017, Shanghai, China
This paper presents a multi-phase flow model for the nanosecond laser ablation of aluminum alloy at a low fluence based on finite volume method, considering gravity, recoil pressure, buoyancy and surface tension to describe vaporization. Actual morphology of ablation crater was measured by a laser scanning confocal microscope to verify the model. Results show that vaporization is the main ablation mechanism for 100ns laser ablation at low fluences, and the peak temperature is only 50% of critical temperature. Both the experimental and calculated crater have a wall-like bulge around the rim, as a result of impact of recoil pressure and resolidification of pushed liquid metal. The calculated depth and diameter of crater are in good agreement with the corresponding experimental measurement indicating the feasibility of the model.
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Chaoqun Song, Shiyun Dong, Shixing Yan, Enzhong Li, Binshi Xu, and Peng He "Simulation of vaporization in low fluence nanosecond laser ablation of aluminum alloy", Proc. SPIE 10710, Young Scientists Forum 2017, 1071041 (5 March 2018);

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