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Making Line Undercut Structure by Incremental Laser Shock Forming
Shuxin You,Xiangying Wang,Zhong Ji,Chao Zheng,Guofang Zhang,Ren Liu 한국정밀공학회 2019 International Journal of Precision Engineering and Vol.20 No.8
A novel technology to plastically deform line undercut structures by pulsed laser, named as incremental laser shock forming (ILSF) of sheet metal, is presented in this paper and is investigated by experiments and numerical simulations. The deformation of a line undercut structure can be considered as the accumulation of several point undercuts, the shape evolution during ILSF of copper foils was observed, and the thickness distribution on a cross-section was measured. The influences of laser energy E, forming height H, and laser spot overlap rate η on the process were studied and a process window was established to avoid deformation failure. The results show that the plastic deformation at η = 0% is less uniform and more vulnerable than that at η = 50%. Three typical failure modes were concluded and discussed. Finite element method simulation was conducted to verify the feasibility of forming line undercut structure by ILSF, and to analyze its deformation mechanism.
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You Li,Mulan Tang,Shuxin Xu,Shuchao Zhang,Yuxin Zhai,Jiarong Yin,Zhengguang Zou 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.114 No.-
The NASICON-type solid electrolyte structure of Li1.3Al0.3Ti1.7(PO4)3 (LATP) exhibits good electrochemicalperformance and thermal stability, and has been promising as a solid electrolyte. Here, a stable goodstabilityLATP precursor spinning solution was prepared using the sol–gel method for the first time. A linearLATP solid electrolyte with an oriented ordered structure was obtained using improved electrostaticspinning equipment. The sintering process regime of the LATP-ordered construction was determined. Theionic conductivity of the prepared LATP-PEO/LiClO4-PEG composite solid-state electrolyte with anordered structure was as high as 2.05 10-4 Scm1 at room temperature (25 C), one order of magnitudehigher than the ionic conductivity of the LATP composite solid-state electrolyte reported so far. Organicsolid-state electrolytes to protect LATP-ordered structured solid-state electrolytes yield excellent electrochemicalstability in lithium-metal batteries.
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