Gas Blow Forming of Nanocrystalline Ni Foil Assisted by Two-Dimensional Pulse Current
Source abstract
Abstract
In order to increase the gas blow formability of Ni foil, a two-dimensional pulse current auxiliary gas blow forming is proposed. In this paper, general free bulging tests, one-dimensional current auxiliary bulging tests, and two-dimensional current auxiliary bulging tests are carried out. The result indicates that the gas blow formability is improved by the two-dimensional pulse current. The ratio of height to diameter is up to 43.75% when the peak current density is 30 A/mm2. The ratio of height to diameter is 20.27% higher than that under the one-dimensional current, 44.63% higher than that under general free bulging forming. The mechanism of the two-dimensional pulse current on the deformation is studied. The result shows that the formability is improved more when the current direction is parallel to the radial strain direction. The pulse current can enhance the dislocation activity. Therefore, the formability of the Ni foil during gas blow forming can be increased.
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Research context
OpenAlex topics: Electromagnetic Effects on Materials · Microstructure and mechanical properties · High-Velocity Impact and Material Behavior
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References (26)
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