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I think I have an explanation for the mysterious effects noticed in the copper wire fragments in the magnetoforming experiments. Copper wire is formed by extrusion through a die (as is most wire) and this places a lot of stress on the crystalline structure. The dies used can introduce a fold in the metal as it's formed that are not apparent in the final piece of wire.. a real problem sometimes as this can weaken the wire. The shattering is purely breaks at the crystalline boundaries of the wire and occur during really high speed shock. The folds in the wire are the folds introduced during wire forming that have "unravelled", so to speak. That takes one hell of a lot of mechanical power and speed to do.. neat trick Me, I just love testing extremely high voltage power interrupters on 384KV multimegawatt power grids.. something about that deep throated hum and 30 foot arcs like gigantically insane Jacobs ladders
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