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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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In Reply to: RE: Cable terminations posted by geoffkait on November 7, 2022 at 04:38:09:
Late to the conversation, sorry for intruding, but consider annealing.
Copper wire starts life as 1000+ pound wire bars that are passed (essentially, extruded) through stages of hot rolling and 'roughing' to a moderate (~10 mm) diameter rod. So it's reasonable to think there might be longitudinal structure, but directionality seems unlikely since the mill passes alternate direction.
The rod is pickled and shaved to remove surface impurities and inclusions, then drawn (stretched, not compressed) into wire in multiple stages. Because copper work-hardens, it is annealed several times through the drawing process before it reach the desired gauge.
At that point, if the copper is to be used for electrical wire, it is finally annealed to a "dead soft" state. Could 'directionality' even exist in that state?
Sorry for my ignorance, but are there readily measurable characteristic changes?
-Paul
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