Formaplode: Processing

High Velocity Metal Forming

We want to explain why metals can be strained to a greater extent before failureat high rates of strain, but also why when the rate of strain becomes to high, the metals fail more quickly.

Within some range of velocities, effects of inertia in the metal suppress the formation of voids and defects that normally lead to reduction of cross-sectional area or "necking", which leads to failure.

We find the concept of Phonon Drag most useful in explaining what we describe in the first paragraph. Currently, this is presented in our presentation from April 10, 2003, but it will be written up here later.

Materials Processing in the assembly of our apparatus.

To make the pressure vessel, we've generally used conventional machining methods without numerical control. The exception is the hemispherical cavity of our pressure vessel, which was bored out on a CNC lathe at the MIT Central Machine Shop.

We made our die by lost-wax casting of a 3D-printed starch positive, and by convntional machining methods on the resulting bronze casting.

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