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Making "small change"...
An older style Washington clad quarter before and after shrinking with an ultrastrong pulsed magnetic field. Notice that the coin's detail is preserved, even though the coin is now smaller in diameter than a dime. The mass and density of the coin stays the same - the coin becomes thicker in the process.
Comment
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Comment by Bert Hickman on June 24, 2011 at 5:50pm -
Making shrunken coins is simply a novelty. However, the technology of high energy rate forming is a process that's used in many industries, and appears to have good future potential in forming aluminum sheet for automotive applications. A similar technology is used in the aerospace industry - the electromagnetic hammer.
Some examples and more info:
http://www.youtube.com/watch?v=5inJ7sDndBI
http://mse-gsd1.matsceng.ohio-state.edu/~glenn/hyperplasticity/Hyperplasticty Main Page.html
http://mse-gsd1.matsceng.ohio-state.edu/~glenn/hyperplasticity/Publications.html
Bert
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Comment by Thomas M. Cunningham on June 24, 2011 at 5:25pm -
Any actual use for this process?
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