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Study of the interplay of vaporisation, melt displacement and melt ejection mechanisms under multiple pulse irradiation of metals

机译:金属多脉冲辐照下汽化,熔体位移和熔体喷射机理的相互作用研究

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摘要

A threefold study combining profilometry, high speed imaging and recoil momentum measurements is used to deconvolve the relative contributions to material removal attributable to vaporisation, melt displacement and explosive melt ejection. The interplay of these three mechanisms is studied as a function of the number of laser pulses incident on an aluminium target and pulse repetition frequency. This study shows cumulative heating affects matter removed as both vapour and liquid melt, and highlights the influence of the vapour plume and ablation crater morphology on the proportions of material removed as melt displacement and melt ejection.
机译:结合轮廓分析,高速成像和反冲动量测量的三方面研究用于消除因汽化,熔体位移和爆炸性熔体喷射而对材料去除的相对贡献。根据入射在铝靶上的激光脉冲数量和脉冲重复频率来研究这三种机制的相互作用。这项研究表明,累积的热量会影响蒸气和液体融化时去除的物质,并强调蒸气羽和烧蚀坑口形态对随着熔体位移和喷出而去除的材料比例的影响。

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