About an inch deep all along one side of the sheet, it split in half.
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Internal stresses. I believe it鈥檚 annealing that can remove those stresses. I think the internal stresses are caused by the cold rolling process.
Oh, cool.
So those stresses create an internal plane where it fails?
From what I鈥檝e seen yes. I鈥檓 by no means an expert. I鈥檝e seen slices cut from larger blocks that then warp like a banana.
Any metallurgists around here? Be interesting to hear how this happens.
I鈥檓 not a metallurgist, but I am good at educated guesses.
knowing how those sheets are made, they are cast poured into an ingot and then sent thru a series of progressive rollers at a high temp. Basically the cross section of the ingot simply gets smashed and stretched into a sheet of X thickness. I鈥檒l bet there was a discontinuity in the ingot pour (possibly a stop-start due to a short run, or machine/human error, accidental splash of water, etc) that resulted in an contaminated layer of the pour. Then when it was rolled out that discontinuity is maintained at the same point in the cross section.
My work produces aluminum in various thicknesses. Can you tell me where you purchased the sheet from? If it was my employer, I鈥檓 sure they鈥檇 want to hear about it. Feel free to PM me.
We already reached out to our supplier, and they are replacing the whole pallet. I鈥檒l pm u tho