Altering the surface wettability of copper sheet using overlapping laser shock imprinting

Shen, Zongbao; Zhang, Lei; Пин, Ли; Liu, Huixia; Li, Kai; Lin, Youyu; Zhou, Guoyang; Wang, Yang; Zhang, Jindian; Wang, Xiao

doi:10.1016/j.apsusc.2020.148736

Cited by 14 publications

(2 citation statements)

References 28 publications

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“…In the bulging zone, local necking often occurs at the position with uneven grain size distribution and large difference in grain orientation. The difference is that grain refinement only occurs on the upper surface of the workpiece, because the laser shock wave attenuates along the thickness direction when acting on the workpiece [ 33 ]. The closer the bulging center, the greater the plastic strain, and the easier it is for local necking to develop into cracks.…”

Section: Resultsmentioning

confidence: 99%

Mold Size Effect in Microscale Laser Dynamic Flexible Bulging Assisted by Laser Pre-Shocking

et al. 2022

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The size effect seriously affects the forming quality of micro-formed parts in the field of micro-forming. This paper focuses on the influence of the mold size effect in microscale laser dynamic flexible bulging (μLDFB). The experimental results indicate that, for the copper foil with a given thickness, there are suitable mold characteristic sizes to obtain better forming quality. The surface quality of bulging parts is poor when the mold characteristic size is small. However, the forming symmetry and forming uniformity of bulging samples are reduced when the mold characteristic size is large. As the laser pulse energy increases, the plastic strain increases, and the bulging samples experience five stages: uniform plastic deformation, local necking, cracks in the bulging zone, complete fracture in the bulging zone and complete rupture at the mold entrance zone. The increase of the surface roughening rate caused by the increase of grain size and mold characteristic size makes local necking easier, which further leads to fracture. On this basis, in this paper laser pre-shocking (LPS) is introduced to improve the forming quality. Comparative experiments show that LPS has a positive effect on improving the surface quality and the forming performance of bulging samples. The forming limit of bulging samples is increased and the occurrence of local necking is delayed.

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Section: Resultsmentioning

confidence: 99%

Mold Size Effect in Microscale Laser Dynamic Flexible Bulging Assisted by Laser Pre-Shocking

et al. 2022

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“…Stafford et al [17] fabricated microwrinkle characteristics with anisotropic wettability using the surface wrinkling technique. Compared with other processing methods, the laser shock imprinting (LSI) technology, as a surface microforming process, has been gradually applied to the field of microstructure processing in recent years, with higher processing accuracy, controllable cost, high processing efficiency, and stronger mechanical properties of its surface because it is obtained through plastic deformation [18,19]. Jin et al [20], successfully fabricated the surface profile of bamboo leaf blades on aluminum foil by LSI, which can improve the application of friction nanogenerators.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of biomimetic anisotropic crescent-shaped microstructured surfaces by laser shock imprinting

Ji,

Meng,

et al. 2023

Materials Science-Poland

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The crescent-shaped microstructure bionic to the slip zone of the slippery zone of the carnivorous plant genus Nepenthes was fabricated on the surface of copper foil by laser shock imprinting (LSI). The microstructure of crescent-shaped grooves was initially fabricated on the surface of the micro-mold by etching, and then the microstructure was replicated on the surface of copper foil through plastic deformation under laser shock loading. Increasing the laser shock energy or the number of shocks can increase the degree of replication of the crescent-shaped microstructure, the height of the crescent-shaped microstructure, and the contact angle of water droplets on the surface. The wettability of the surface of the crescent microstructure is anisotropic and increases with an increase in offset distance. The anisotropy of the crescent-shaped microstructure causes the solid–liquid contact line in the direction of the bottom of the arc to become a long and approximately straight line. According to the rule that controlling LSI processing parameters can fabricate surfaces with different heights and wettability, a gradient wetting surface consisting of crescent-shaped microstructures was designed to achieve the directional spreading of droplets. By altering the distribution of crescent-shaped microstructures, a type-I flow channel with the ability to limit the spreading range of water droplets was fabricated.

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Fabricating micro-dent on the surface of ultrafine-grained pure copper by laser-induced shock wave and its deformation behavior

Zheng

Zhao

et al. 2022

Int J Adv Manuf Technol

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Altering the surface wettability of copper sheet using overlapping laser shock imprinting

Cited by 14 publications

References 28 publications

Mold Size Effect in Microscale Laser Dynamic Flexible Bulging Assisted by Laser Pre-Shocking

Mold Size Effect in Microscale Laser Dynamic Flexible Bulging Assisted by Laser Pre-Shocking

Fabrication of biomimetic anisotropic crescent-shaped microstructured surfaces by laser shock imprinting

Fabricating micro-dent on the surface of ultrafine-grained pure copper by laser-induced shock wave and its deformation behavior

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