Effect of topology and material properties on the imprint quality of the femtosecond-laser-induced surface structures
Effect of topology and material properties on the imprint quality of the femtosecond-laser-induced surface structures
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DOI：
10.1007/s10853-017-1805-z
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发表时间：
2018-03
影响因子：
4.5
通讯作者：
Yingxiao Song;A. Tsubaki;C. Zuhlke;E. Rezaei;G. Gogos;D. Alexander;J. Shield
中科院分区：
文献类型：
--
作者：
Yingxiao Song;A. Tsubaki;C. Zuhlke;E. Rezaei;G. Gogos;D. Alexander;J. Shield
飞秒激光表面处理（FLSP）是一种可用于改性表面的技术，其赋予许多期望的性质，例如改善的润湿性、热传递和减阻。FLSP表面的形态沿着与表面化学是强烈影响所产生的表面的润湿行为的关键因素。以经济的方式在大面积上再现FLSP原始表面是一个挑战。本文研究了在无氧铜上压印FLSP表面。基于FLSP钛表面的拓扑结构，建立了一个由自组织结构之间的粗糙度和周期定义的土丘拓扑结构模型。这种拓扑结构影响由坯料中的塑性变形指示的压印质量，并且被定义为目标材料样本。无氧铜和不锈钢304都被用作本研究中的空白靶材料，并代表软材料和硬材料试样。应力-位移关系被用来确定压印参数的灵敏度。通过比较等效压印模型与纳米压痕实验结果，验证了压印模型的正确性。模型结果表明，模具的形态，特别是模具粗糙度周期比（指的峰谷高度和峰峰距离），有更大的影响比坯料材料本身。
Femtosecond laser surface processing (FLSP) is a technique that can be used to modify surfaces imparting many desirable properties, such as an improved wettability, heat transfer, and drag reduction. The morphology of the FLSP surface along with surface chemistry is critical factors that strongly influences the wetting behavior of surfaces produced. Reproducing the FLSP original surface over a large area in an economic manner is a challenge. In this paper, imprinting the FLSP surface on oxygen-free copper is investigated. Based on the topology of an FLSP titanium surface, a model has been established to investigate the topology of the mounds, which is defined by the roughness and period between the self-organized structures. This topology affects the imprint quality indicated by the plastic deformation in the blank and is defined as the target material specimen. Both oxygen-free copper and stainless steel 304 were used as blank target material in this study and represent both soft and hard material specimens. The stress–displacement relationship was used to determine the sensitivity of imprint parameters. The imprint model was verified by comparing an equivalent imprint model with nanoindentation experimental results. The model results showed that the die’s morphology, in particular the die roughness-to-period ratio (referring to the peak-to-valley height and the peak-to-peak distance), had greater influence than the blank material itself.