Experimental investigation on laser shock micro hydraulic bulging of copper foil

This paper reports on a novel microforming technique, Flexible-Pad Laser Shock Forming (FPLSF) which uses laser-induced shock waves and a flexible pad to induce plastic deformation on metallic foils. Thickness distribution at the cross-section of the craters formed by FPLSF is analyzed experimentally with respect to laser fluence, which is a significant process variable that controls the deformation pressure. Furthermore, hardness of the deformed samples at the cross-section is measured by nanoindentation testing. It is found that the thinning of copper foil by FPLSF ranges from 7% to 25% for laser fluence ranging between 7.3 J/cm2 and 20.9 J/cm2. Thinning is maximum at the crater center, which can be attributed to the maximum compressive stresses in the thickness direction, and minimum at the edge portions. With increase in laser fluence, thinning of the foil increases whereas minimum change in hardness is observed. The variation in thinning across different crater locations ranges between 6% and 8% only, which indicates that FDLSF can be developed as a competitive technique to produce components with uniform thickness distribution.

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Effects of laser power density and initial grain size in laser shock punching of pure copper foil

Optics and Lasers in Engineering ◽

10.1016/j.optlaseng.2017.12.009 ◽

2018 ◽

Vol 105 ◽

pp. 35-42 ◽

Cited By ~ 4

Author(s):

Chao Zheng ◽

Xiu Zhang ◽

Yiliang Zhang ◽

Zhong Ji ◽

Yiguo Luan ◽

...

Keyword(s):

Grain Size ◽

Power Density ◽

Laser Power ◽

Copper Foil ◽

Pure Copper ◽

Laser Power Density ◽

Laser Shock

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Research on Laser Shock Induced Composite Forming of Copper Foil Flyer

Chinese Journal of Lasers ◽

10.3788/cjl201239.0703009 ◽

2012 ◽

Vol 39 (7) ◽

pp. 0703009

Author(s):

周建忠 Zhou Jianzhong ◽

高彬 Gao Bin ◽

黄舒 Huang Shu ◽

刘会霞 Liu Huixia ◽

陈寒松 Chen Hansong ◽

...

Keyword(s):

Copper Foil ◽

Laser Shock ◽

Composite Forming

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Laser Shock Induced Deformation of Copper Foil on Diverse Molds and the Cross-Sectional Microstructure Changes

Coatings ◽

10.3390/coatings10121264 ◽

2020 ◽

Vol 10 (12) ◽

pp. 1264

Author(s):

Di Huang ◽

Jiaxiang Man

Keyword(s):

Copper Foil ◽

Laser Energy ◽

Three Dimensional ◽

Element Model ◽

Hexagonal Structure ◽

Residual Stress Distribution ◽

Laser Shock ◽

Cross Sectional ◽

Forming Mechanism ◽

Pulse Laser Energy

The microscale structures prepared on copper foil by laser shock deformation was introduced in the paper. The various sizes of hexagonal structures were successfully fabricated on copper foil with different molds. The influence of laser energy on the deformation depth of a hexagonal structure was studied using experiments. The morphology of the hexagonal structures on copper foil was observed by a three-dimensional profilometer, and mechanical property were characterized by a nanoindenter. A finite element model was established in order to describe the copper foil forming mechanism on mold and calculate the residual stress distribution. The microstructures and cross-section deformation of copper foil on different molds were also observed. The results indicated that the depth of hexagonal structures on 50# mold was higher than that of the structures on 100# mold and 230# mold, and the depth of hexagonal structures increased with the increasing of pulse laser energy. The copper foil above the mold hexagon side was bent and thinned after laser shock, and the grains of copper foil were also refining. The mechanical properties of copper foil were improved after laser shock was performed on the mold.

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Experimental Investigation of Oblique Laser Shock Processing on Aero-engine Fan Shaft

Proceedings of the International Symposium on Mechanical Engineering and Material Science ◽

10.2991/ismems-16.2016.56 ◽

2016 ◽

Author(s):

Peiyu Zhang ◽

Cheng Wang ◽

Yan Chai

Keyword(s):

Experimental Investigation ◽

Laser Shock ◽

Laser Shock Processing ◽

Aero Engine ◽

Shock Processing

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Forming Al and Mg Alloy Sheet and Tube at Elevated Temperatures

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.344.317 ◽

2007 ◽

Vol 344 ◽

pp. 317-324 ◽

Cited By ~ 3

Author(s):

Taylan Altan ◽

Serhat Kaya ◽

Yingyot Aue-u-Ian

Keyword(s):

Experimental Investigation ◽

Magnesium Alloys ◽

Elevated Temperatures ◽

Tube Hydroforming ◽

Alloy Sheet ◽

Effect Of Temperature ◽

Punch Velocity ◽

Aluminum And Magnesium Alloys ◽

Blank Size ◽

Hydraulic Bulging

Experimental investigation on the formability limits of aluminum and magnesium alloys are conducted through hydraulic bulging and deep drawing. New tube hydroforming tooling was designed and the submerged tool concept is introduced. Tube hydroforming experiments were conducted with and without axial feed by using AA6061 tubes. The formability of Mg AZ31-O sheets are determined by hydraulic bulging using similar submerged tool. Finally the effect of temperature and initial blank size on the attainable highest punch velocity is investigated and round cups from Mg AZ31-O were successfully formed in a heated tool with punch speeds up to 300 mm/s.

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